{"title":"Potassium sources","description":"\u003cp\u003eSulphate of potash, \u003ca href=\"\/products\/potassium-silicate\"\u003epotassium silicate\u003c\/a\u003e, humates and kelps. Test before you add: excess potassium blocks magnesium.\u003c\/p\u003e","products":[{"product_id":"kelp-meal","title":"Acadian Kelp Meal","description":"\u003ch2\u003eAcadian Kelp Meal\u003c\/h2\u003e\n\u003cp class=\"sc-lede\"\u003eAcadian Kelp Meal is dried, milled Ascophyllum nodosum seaweed. It is a biostimulant for soil mixes, pots and garden beds, not a fertiliser: a top dress brings only a small share of the nitrogen and potassium a crop uses.\u003c\/p\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: amendment, biostimulant (dried seaweed meal)\u003c\/li\u003e\n\u003cli\u003eSupplier certificate on file: OMRI listing. \u003ca href=\"\/pages\/organic-certificates#kelp-meal\"\u003eSee the certificate and its dates\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eAnalysis: N 0.80%, P\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e5\u003c\/sub\u003e 0.23% (P 0.10%), K\u003csub\u003e2\u003c\/sub\u003eO 1.81% (K 1.50%), S 2.00%, Na 3.50% (supplier specification)\u003c\/li\u003e\n\u003cli\u003eUse for: soil mixes, top dressing, garden beds\u003c\/li\u003e\n\u003cli\u003eRate: 125 g per square metre as a top dress; up to 190 g per 50 L of mix\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eAscophyllum nodosum is a brown seaweed of the North Atlantic coasts. Acadian Kelp Meal is the whole plant, dried and milled. Like other brown seaweeds it carries alginic acid, the gel forming compound of the cell walls.\u003c\/p\u003e\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKelp is a biostimulant: its compounds act on the plant's own growth hormones and help it ride out stress. Most of the trials behind that used liquid extracts rather than meal.\u003c\/li\u003e\n\u003cli\u003eKelp meal is about one percent nitrogen. At 125 g per square metre it brings about 1 g of nitrogen and 1.9 g of potassium. A tomato crop takes up about 19 g of nitrogen and 23 g of potassium per square metre. Feed the crop first, then add kelp.\u003c\/li\u003e\n\u003cli\u003eIts trace elements arrive in milligrams: at 125 g per square metre, about 11 mg of boron and 2.5 mg of zinc.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAnalysis\u003c\/h3\u003e\n\u003cp\u003eTypical analysis (supplier specification), % by weight:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNitrogen (N): 0.80%\u003c\/li\u003e\n\u003cli\u003ePhosphorus as P\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e5\u003c\/sub\u003e: 0.23% (0.10% elemental P)\u003c\/li\u003e\n\u003cli\u003ePotassium as K\u003csub\u003e2\u003c\/sub\u003eO: 1.81% (1.50% elemental K)\u003c\/li\u003e\n\u003cli\u003eSulphur (S): 2.00%\u003c\/li\u003e\n\u003cli\u003eCalcium (Ca): 1.20%\u003c\/li\u003e\n\u003cli\u003eMagnesium (Mg): 0.70%\u003c\/li\u003e\n\u003cli\u003eSodium (Na): 3.50%\u003c\/li\u003e\n\u003cli\u003eIron (Fe): 0.01%\u003c\/li\u003e\n\u003cli\u003eCopper (Cu): 2.0 ppm\u003c\/li\u003e\n\u003cli\u003eManganese (Mn): 20.0 ppm\u003c\/li\u003e\n\u003cli\u003eZinc (Zn): 20.0 ppm\u003c\/li\u003e\n\u003cli\u003eBoron (B): 90.0 ppm\u003c\/li\u003e\n\u003cli\u003eCobalt (Co): 0.0 ppm\u003c\/li\u003e\n\u003cli\u003eMolybdenum (Mo): 0.0 ppm\u003c\/li\u003e\n\u003cli\u003eSelenium (Se): 1.0 ppm\u003c\/li\u003e\n\u003cli\u003eIodine (I): 300.0 ppm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSoil mix: up to 190 g (2 cups) per 50 L of mix.\u003c\/li\u003e\n\u003cli\u003eBeds: up to 560 g (6 cups) per square metre.\u003c\/li\u003e\n\u003cli\u003eTop dress: 125 g per square metre of soil.\u003c\/li\u003e\n\u003cli\u003eMeasures: 3\/4 cup is about 70 g; 4 kg is about 44 cups or 10 L.\u003c\/li\u003e\n\u003cli\u003eKelp meal is not a nitrogen source. Do not rely on it to feed a crop.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLearn more in fifteen seconds\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-68-kelp-is-not-fertiliser\"\u003eKelp is not fertiliser\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-77-every-amendment-brings-passengers\"\u003eEvery amendment brings passengers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHandling and storage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWear a mask to avoid inhaling particles and open in a well ventilated area.\u003c\/li\u003e\n\u003cli\u003eWear gloves and eye protection, and wash hands after use.\u003c\/li\u003e\n\u003cli\u003eOnce opened, keep sealed and dry.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Seacliff Organics","offers":[{"title":"500g","offer_id":39264942489623,"sku":"SCOKELP0500G","price":22.0,"currency_code":"NZD","in_stock":true},{"title":"25kg","offer_id":32585657876585,"sku":"SCOKELPMEAL","price":385.0,"currency_code":"NZD","in_stock":true},{"title":"1.5kg","offer_id":44241293541399,"sku":null,"price":49.5,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9104\/0361\/files\/SeacliffMockBags-KelpPowder1WM.jpg?v=1747707987"},{"product_id":"potassium-sulfate-sulphate-of-potash","title":"Potassium Sulphate","description":"\u003ch2\u003ePotassium Sulphate (Sulphate of Potash)\u003c\/h2\u003e\n\u003cp class=\"sc-lede\"\u003ePotassium Sulphate, also known as Sulphate of Potash, is a soluble potassium and sulphur fertiliser, 42.00% potassium (50.60% K\u003csub\u003e2\u003c\/sub\u003eO) and 17.00% sulphur, that is virtually chloride free. It suits fruiting and flowering plants and growers who want potassium without the chloride load of potassium chloride.\u003c\/p\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: mineral fertiliser (soluble salt)\u003c\/li\u003e\n\u003cli\u003eSupplier certificate on file: BioGro licence 297. \u003ca href=\"\/pages\/organic-certificates#potassium-sulfate-sulphate-of-potash\"\u003eSee the certificate and its dates\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eAnalysis: NPK = 0 - 0 - 50.6 (N, P\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e5\u003c\/sub\u003e, K\u003csub\u003e2\u003c\/sub\u003eO); potassium 42.00% elemental; sulphur 17.00%\u003c\/li\u003e\n\u003cli\u003eUse for: fruiting and flowering plants; potassium top-ups from a soil test\u003c\/li\u003e\n\u003cli\u003eRate: 50 to 75 g per square metre before planting; 50 g per established plant at the dripline\u003c\/li\u003e\n\u003cli\u003eBulk: 500 kg and 1000 kg quantities available, email store@seaclifforganics.nz for a quote\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003ePotassium sulphate (sulphate of potash) is a mined and refined mineral salt. It is virtually chloride free and has a lower salt index than potassium chloride (muriate of potash), so it is the potassium source most used in the organic sector. The potassium and sulphur are in sulphate form, readily available to the plant, and it mixes well with other fertilisers.\u003c\/p\u003e\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePotassium regulates water movement in the plant and drives bud and fruit density. Deficiency shows as burnt edges on old leaves.\u003c\/li\u003e\n\u003cli\u003eSulphur is used for proteins, oils and flavour compounds.\u003c\/li\u003e\n\u003cli\u003eBoth are supplied in soluble form, so they are available as soon as they are watered in.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAnalysis\u003c\/h3\u003e\n\u003cp\u003eNPK = 0 - 0 - 50.6 (N, P\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e5\u003c\/sub\u003e, K\u003csub\u003e2\u003c\/sub\u003eO)\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePotassium (K\u003csub\u003e2\u003c\/sub\u003eO) 50.60%\u003c\/li\u003e\n\u003cli\u003ePotassium (K, elemental) 42.00%\u003c\/li\u003e\n\u003cli\u003eSulphur (S) 17.00%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSeedlings and transplanting: before planting apply 50 to 75 g (about 2 and a half to 3 and a half tablespoons) per square metre of garden. Mix thoroughly into the soil and water in well.\u003c\/li\u003e\n\u003cli\u003eEstablished plants: apply 50 g (about 2 and a half tablespoons) per plant around the dripline. Lightly fork into the soil and water in well, taking care to wash any product off the foliage.\u003c\/li\u003e\n\u003cli\u003eBulk is available in 500 kg and 1000 kg quantities; email store@seaclifforganics.nz for a quote.\u003c\/li\u003e\n\u003cli\u003ePotassium competes with magnesium and calcium for uptake, so heavy potassium applications can induce a magnesium deficiency even when the soil has enough. It is a soluble salt, so keep it off foliage and water it in, and apply from a soil test rather than by habit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLearn more in fifteen seconds\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-44-potassium\"\u003ePotassium: what it does\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-47-sulphur\"\u003eSulphur: what it does\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-86-mulders-chart-what-blocks-what\"\u003eMulder's chart: what blocks what\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHandling and storage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWear a mask to avoid inhaling particles and open in a well ventilated area.\u003c\/li\u003e\n\u003cli\u003eWear gloves and eye protection, and wash hands after use.\u003c\/li\u003e\n\u003cli\u003eOnce opened, keep sealed and dry.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Seacliff Organics","offers":[{"title":"1kg","offer_id":39315491684375,"sku":"SCOPOTA01KG","price":17.0,"currency_code":"NZD","in_stock":true},{"title":"4kg","offer_id":39315491717143,"sku":"SCOPOTA04KG","price":45.0,"currency_code":"NZD","in_stock":true},{"title":"10kg","offer_id":39315491749911,"sku":"SCOPOTA10KG","price":80.0,"currency_code":"NZD","in_stock":true},{"title":"25kg","offer_id":39315492077591,"sku":"SCOPOTA25KG","price":175.0,"currency_code":"NZD","in_stock":true},{"title":"500kg","offer_id":39957382692887,"sku":"SCOPOTA500KG","price":3500.0,"currency_code":"NZD","in_stock":true},{"title":"1000kg","offer_id":39957382758423,"sku":"SCOPOTA1000KG","price":6750.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9104\/0361\/files\/SeacliffMockBags-PotassiumSulfate1WM.jpg?v=1747707980"},{"product_id":"tri-kelp","title":"Tri-Kelp (ACC Organic)","description":"\u003ch2\u003eTri-Kelp (ACC Organic)\u003c\/h2\u003e\n\u003cp class=\"sc-lede\"\u003eTri-Kelp is a freeze dried, fully water soluble kelp powder blended from three seaweeds: Laminaria, Sargassum and Ascophyllum nodosum. A soluble seaweed extract for foliar sprays, fertigation, cutting dips and the watering can.\u003c\/p\u003e\n\u003cp\u003eNote: the latest batch is more grainy than the earlier powder. All other information is unchanged.\u003c\/p\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: biostimulant, soluble seaweed extract powder\u003c\/li\u003e\n\u003cli\u003eOrganic input status: ACO registered farm input 456AI (NTS). \u003ca href=\"\/pages\/organic-certificates#tri-kelp\"\u003eSee the details and dates\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eAnalysis: NPK = 0.9 - 0 - 18.1 (N, P\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e5\u003c\/sub\u003e, K\u003csub\u003e2\u003c\/sub\u003eO); elemental 0.89 - 0 - 15.03; alginic acid 18%\u003c\/li\u003e\n\u003cli\u003eUse for: foliar sprays, fertigation, rooting and seedling dips\u003c\/li\u003e\n\u003cli\u003eRate: 10 g (about 1 tablespoon) per 10 L of water as a foliar; 1 teaspoon per 9 L watering can in the home garden\u003c\/li\u003e\n\u003cli\u003eCertification: ACC Organic (as stated in the product name)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eTri-Kelp blends three kelp species, Laminaria, Sargassum and Ascophyllum nodosum, freeze dried into a 100% water soluble powder. Because it dissolves fully it suits sprayers, drip lines and watering cans.\u003c\/p\u003e\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKelp is a biostimulant: its compounds act on the plant's own growth hormones and help it ride out stress. Most of the trials behind that used soluble extracts like this one.\u003c\/li\u003e\n\u003cli\u003eIt is not a fertiliser at these rates. A 10 g dose brings about 1.5 g of potassium and under 0.1 g of nitrogen.\u003c\/li\u003e\n\u003cli\u003eGrowers use it as a foliar through vegetative growth and before flowering, and as a dip for cuttings and seedlings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAnalysis\u003c\/h3\u003e\n\u003cp\u003eSupplier typical analysis:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNPK = 0.9 - 0 - 18.1 (N, P\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e5\u003c\/sub\u003e, K\u003csub\u003e2\u003c\/sub\u003eO); elemental 0.89 - 0 - 15.03\u003c\/li\u003e\n\u003cli\u003eNitrogen (N): 0.89%\u003c\/li\u003e\n\u003cli\u003ePhosphorus (P): 0.00%\u003c\/li\u003e\n\u003cli\u003ePotassium as K\u003csub\u003e2\u003c\/sub\u003eO: 18.11% (15.03% elemental K)\u003c\/li\u003e\n\u003cli\u003eSulphur (S): 1.05%\u003c\/li\u003e\n\u003cli\u003eCalcium (Ca): 0.45%\u003c\/li\u003e\n\u003cli\u003eMagnesium (Mg): 0.17%\u003c\/li\u003e\n\u003cli\u003eIron (Fe): 1.07%\u003c\/li\u003e\n\u003cli\u003eAlginic acid: 18%\u003c\/li\u003e\n\u003cli\u003eSilicon (Si): 445 ppm\u003c\/li\u003e\n\u003cli\u003eManganese (Mn): 92 ppm\u003c\/li\u003e\n\u003cli\u003eZinc (Zn): 48 ppm\u003c\/li\u003e\n\u003cli\u003eBoron (B): 46 ppm\u003c\/li\u003e\n\u003cli\u003eCopper (Cu): 34 ppm\u003c\/li\u003e\n\u003cli\u003eCobalt (Co): 8 ppm\u003c\/li\u003e\n\u003cli\u003eMolybdenum (Mo): 5 ppm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003cp\u003e10 g is about 1 tablespoon.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFoliar spray, vegetables: 10 g per 10 L of water, up to 750 g per hectare equivalent, every 1 to 2 weeks or as required.\u003c\/li\u003e\n\u003cli\u003eFoliar spray, orchards and vineyards: 10 g per 10 L of water, up to 1 kg per hectare equivalent, just before flowering.\u003c\/li\u003e\n\u003cli\u003eFoliar spray, ornamentals, natives and turf: 10 g per 10 L of water, up to 750 g per hectare equivalent, as required.\u003c\/li\u003e\n\u003cli\u003eFoliar spray, broadacre crops: 100 to 200 g per hectare in 60 to 100 L of water, depending on canopy closure, as required.\u003c\/li\u003e\n\u003cli\u003eFoliar spray, pasture: 100 to 200 g per hectare in 60 to 100 L of water, as required.\u003c\/li\u003e\n\u003cli\u003eFertigation, vegetables: 1 kg per hectare, every 1 to 2 weeks or as required.\u003c\/li\u003e\n\u003cli\u003eFertigation, orchards and vineyards: 1 kg per hectare, just before flowering or as required.\u003c\/li\u003e\n\u003cli\u003eFertigation, ornamentals, natives and turf: 1 kg per hectare, as required.\u003c\/li\u003e\n\u003cli\u003eRooting powder: dip cuttings in a 1:1000 solution (1 g per litre, about 1\/3 teaspoon).\u003c\/li\u003e\n\u003cli\u003eSeedling treatment: dip seedlings in a 1:1000 solution (1 g per litre, about 1\/3 teaspoon), or fertigate straight after planting at 1 kg per hectare.\u003c\/li\u003e\n\u003cli\u003eHome garden: add 1 teaspoon to a 9 L watering can and water in.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLearn more in fifteen seconds\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-68-kelp-is-not-fertiliser\"\u003eKelp is not fertiliser\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-31-foliar-feeding\"\u003eFoliars: fast fixes, then the soil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHandling and storage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWear a mask to avoid inhaling particles and open in a well ventilated area.\u003c\/li\u003e\n\u003cli\u003eWear gloves and eye protection, and wash hands after use.\u003c\/li\u003e\n\u003cli\u003eOnce opened, keep sealed and dry.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Seacliff Organics","offers":[{"title":"50g","offer_id":40050942410775,"sku":"SCOTRIK50G","price":9.9,"currency_code":"NZD","in_stock":true},{"title":"500g","offer_id":32618574479465,"sku":"SCOTRIK500G","price":41.9,"currency_code":"NZD","in_stock":true},{"title":"1kg","offer_id":32618574545001,"sku":"SCOTRIK02KG","price":84.9,"currency_code":"NZD","in_stock":true},{"title":"20kg","offer_id":32618574577769,"sku":"SCOTRIK20KG","price":1580.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9104\/0361\/files\/SeacliffMockBags-Tri-Kelp1WM_1801c2ef-682d-4ef4-aca3-6bf94afa0b54.jpg?v=1747707951"},{"product_id":"potassium-silicate","title":"Potassium Silicate","description":"\u003ch2\u003ePotassium Silicate\u003c\/h2\u003e\n\u003cp class=\"sc-lede\"\u003ePotassium Silicate is a water soluble silica and potassium powder, 53.00% SiO\u003csub\u003e2\u003c\/sub\u003e (24.8% silicon) and 32.00% K\u003csub\u003e2\u003c\/sub\u003eO (26.6% potassium). It suits growers who want to add plant available silicon to irrigation water or foliar sprays, raise the pH of their water, or emulsify neem oil for pest sprays.\u003c\/p\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: soluble mineral salt (silicon and potassium)\u003c\/li\u003e\n\u003cli\u003eOrganic input status: not certified; a manufactured input. \u003ca href=\"\/pages\/organic-certificates#potassium-silicate\"\u003eSee the note on its organic status\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eAnalysis: NPK = 0 - 0 - 32 (N, P\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e5\u003c\/sub\u003e, K\u003csub\u003e2\u003c\/sub\u003eO); silica 53.00% (24.8% Si); potassium 26.6% elemental\u003c\/li\u003e\n\u003cli\u003eUse for: soluble silicon in irrigation or foliar sprays; raising water pH; emulsifying neem oil\u003c\/li\u003e\n\u003cli\u003eRate: make a concentrate of 148 g per litre of water, then use half a teaspoon of concentrate per 10 litres as a foliar spray\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003ePotassium silicate is one of the few forms of silica that dissolves in water, which is what makes it useful for irrigation and foliar use. Many liquid silica products are potassium silicate dissolved in water; our \u003ca href=\"\/products\/seacliff-organics-liquid-potassium-silicate-1l\"\u003eLiquid Potassium Silicate\u003c\/a\u003e is this powder at 148 g per litre. It is not the same as insoluble silica powders such as diatomaceous earth or rock dust, which release silicon slowly if at all.\u003c\/p\u003e\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSupplies silicon in the soluble form plants take up. Silicon is laid down in cell walls and stems, hardening them, and growers use it for sturdier plants and some resistance to mildew and stress. Build it in early.\u003c\/li\u003e\n\u003cli\u003eSupplies potassium, 26.6% as the element.\u003c\/li\u003e\n\u003cli\u003eThe solution is strongly alkaline, so it is the usual way to raise the pH of irrigation water or a nutrient solution.\u003c\/li\u003e\n\u003cli\u003eWorks as an emulsifier: it lets neem oil mix into water for pest management sprays.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAnalysis\u003c\/h3\u003e\n\u003cp\u003eNPK = 0 - 0 - 32 (N, P\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e5\u003c\/sub\u003e, K\u003csub\u003e2\u003c\/sub\u003eO); elemental potassium 26.6%\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSilica (SiO\u003csub\u003e2\u003c\/sub\u003e) 53.00% (24.8% Si, elemental)\u003c\/li\u003e\n\u003cli\u003ePotassium (K\u003csub\u003e2\u003c\/sub\u003eO) 32.00% (26.6% K, elemental)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConcentrate: dissolve 148 g in 1 litre of water to make a 7.8% liquid solution (7.8% SiO\u003csub\u003e2\u003c\/sub\u003e w\/v) that you can store and dose from.\u003c\/li\u003e\n\u003cli\u003eFoliar spray: half a teaspoon of concentrate per 10 litres of water.\u003c\/li\u003e\n\u003cli\u003eNeem oil emulsifier: add 3 g of potassium silicate to 30 ml of neem oil, then mix into 10 litres of water to make the final spray. Spray once a week over all plant surfaces until it runs off.\u003c\/li\u003e\n\u003cli\u003eSoil drench: use the same concentrate, diluted, through irrigation; see the Liquid Potassium Silicate page for the soil rate (2.5 to 5 ml of liquid per 10 litres).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLearn more in fifteen seconds\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-54-silicon\"\u003eSilicon: what it does\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-30-soil-ph-water-ph\"\u003eSoil pH, water pH: how to move it\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHandling and storage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWear a mask to avoid inhaling particles and open in a well ventilated area.\u003c\/li\u003e\n\u003cli\u003eWear gloves and eye protection, and wash hands after use.\u003c\/li\u003e\n\u003cli\u003eOnce opened, keep sealed and dry.\u003c\/li\u003e\n\u003cli\u003ePotassium silicate is strongly alkaline. Wear gloves and eye protection when making the concentrate, add the powder to the water and not the other way round, and check the pH of the final spray or feed before it goes on; a strong solution will burn leaves and push a soil or nutrient solution well above target. Do not mix it concentrated with acids or with calcium or magnesium salts, which precipitate it out. Test a few leaves first.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Seacliff Organics","offers":[{"title":"250g","offer_id":39383996530711,"sku":"HMLSILCO250g","price":34.9,"currency_code":"NZD","in_stock":true},{"title":"1kg","offer_id":39383996596247,"sku":"HMLSILCO1kg","price":99.9,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9104\/0361\/products\/Agsil16H_cee17f24-f22c-44f3-864b-4ce5e625368a.jpg?v=1635819562"},{"product_id":"k-humate-potassium-humate","title":"K-Humate (Potassium Humate)","description":"\u003ch2\u003eK-Humate (Potassium Humate)\u003c\/h2\u003e\n\u003cp class=\"sc-lede\"\u003eK-Humate is a soluble potassium humate: humic and fulvic acids carrying potassium, 15% potassium by weight. It dissolves fully in water for drenching and irrigation, or can be raked into topsoil, and is meant to be used alongside organic or mineral fertilisers.\u003c\/p\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: amendment, soluble humate (potassium humate)\u003c\/li\u003e\n\u003cli\u003eSupplier certificate on file: AsureQuality certificate. \u003ca href=\"\/pages\/organic-certificates#k-humate-potassium-humate\"\u003eSee the certificate and its dates\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eAnalysis: NPK = 0 - 0 - 15; potassium (K) 15.00%; potassium humate and fulvate 85 to 95%\u003c\/li\u003e\n\u003cli\u003eUse for: adding humic substances through irrigation or to topsoil, with other fertilisers\u003c\/li\u003e\n\u003cli\u003eRate: 2 to 10 kg per hectare, which is 2 to 10 g per 10 square metres\u003c\/li\u003e\n\u003cli\u003eCertification: AsureQuality Organic Input for Organics, licence 1163 (certificate on file)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eK-Humate is 100% soluble humic acid, suitable for all soil types and irrigation systems. It can be applied as a solution, or scattered and raked into topsoil. The supplier recommends using it with organic or mineral fertilisers rather than on its own.\u003c\/p\u003e\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHumic substances are the dark, stable fraction of soil organic matter. Humic and fulvic acids are chelators. A chelator is a molecule that wraps around a metal ion, such as iron or zinc, and holds it in a soluble form, so the metal stays in solution instead of precipitating out of reach of the root.\u003c\/li\u003e\n\u003cli\u003eAcross trials, humic substances lift plant growth by about a fifth on average, with wide swings between trials. Most of those trials were in pots; field results range from gains to no change. They help most in low organic matter, sandy or saline soils and least in compost rich soil.\u003c\/li\u003e\n\u003cli\u003eGrowers use K-Humate for its humic acids, not as a potassium fertiliser: 10 g per 10 square metres brings 1.5 g of potassium.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAnalysis\u003c\/h3\u003e\n\u003cp\u003eSupplier figures (no laboratory certificate of analysis is on file for the potassium figure):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNPK = 0 - 0 - 15\u003c\/li\u003e\n\u003cli\u003ePotassium (K): 15.00% (more than 15% potassium by weight)\u003c\/li\u003e\n\u003cli\u003ePotassium humate and fulvate: 85 to 95%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2 to 10 kg per hectare, which is 2 to 10 g per 10 square metres.\u003c\/li\u003e\n\u003cli\u003eDissolve in water for irrigation or drenching, or scatter and rake into the topsoil.\u003c\/li\u003e\n\u003cli\u003eWhen dissolving it for mixing with other fertilisers, test for compatibility first with a small batch in a jar.\u003c\/li\u003e\n\u003cli\u003eThe pH of the solution should not drop below 6.0.\u003c\/li\u003e\n\u003cli\u003eHumates drop out of solution in acid mixes. If the pH of a tank mix falls below 6.0 the humate can precipitate, so jar test before mixing with acidic fertilisers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLearn more in fifteen seconds\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-78-humates-modest-not-magic\"\u003eHumates: modest, not magic\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-83-fulvic-acid-the-small-chelator\"\u003eFulvic acid: the small chelator\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHandling and storage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWear a mask to avoid inhaling particles and open in a well ventilated area.\u003c\/li\u003e\n\u003cli\u003eWear gloves and eye protection, and wash hands after use.\u003c\/li\u003e\n\u003cli\u003eOnce opened, keep sealed and dry.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Seacliff Organics","offers":[{"title":"100g","offer_id":40462333739031,"sku":"SCOKHUMAT100","price":9.9,"currency_code":"NZD","in_stock":true},{"title":"500g","offer_id":39802307805207,"sku":"SCOKHUMAT500","price":14.9,"currency_code":"NZD","in_stock":true},{"title":"1.5kg","offer_id":39802307837975,"sku":"SCOKHUMAT1.5","price":27.9,"currency_code":"NZD","in_stock":false},{"title":"4kg","offer_id":39802307870743,"sku":"SCOKHUMAT4","price":83.9,"currency_code":"NZD","in_stock":true},{"title":"10kg","offer_id":39802307903511,"sku":"SCOKHUMAT10","price":165.9,"currency_code":"NZD","in_stock":true},{"title":"25kg","offer_id":39957337178135,"sku":null,"price":409.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9104\/0361\/files\/SeacliffMockBags-K-Humate1WM.jpg?v=1747707850"},{"product_id":"fermented-comfrey-extract-1l","title":"Fermented Comfrey Extract","description":"\u003ch2\u003eFermented Comfrey Extract\u003c\/h2\u003e\n\u003cp class=\"sc-lede\"\u003eFermented Comfrey Extract is a ready to use liquid plant feed made by fermenting comfrey leaves, the traditional potassium rich feed for flowering and fruiting plants. Dilute it as a soil drench or foliar spray at any stage from seedling to flowering.\u003c\/p\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: liquid fermented plant extract (comfrey)\u003c\/li\u003e\n\u003cli\u003eUse for: soil drench and foliar spray, flowering and fruiting plants, compost tea\u003c\/li\u003e\n\u003cli\u003eRate: soil drench 1 part in 100 to 1 part in 500 (10 ml down to 2 ml per litre); foliar 1 part in 500 (2 ml per litre)\u003c\/li\u003e\n\u003cli\u003ePack: 1 litre\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eComfrey (Symphytum) is the gardener's potassium plant: its deep roots pull up potassium and the leaves are cut, covered with water and fermented into a liquid feed. Ours is made that way, strained and bottled ready to dilute.\u003c\/p\u003e\n\u003cp\u003eWe do not have an analysis for the extract, so no figures are stated.\u003c\/p\u003e\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSupplies potassium and other minerals from the comfrey leaf in solution, which is why growers use it on flowering and fruiting plants.\u003c\/li\u003e\n\u003cli\u003eAdds the microbes and metabolites of the ferment to a drench or a compost tea.\u003c\/li\u003e\n\u003cli\u003eSuits any stage from seedling to flowering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSoil drench: dilute 1 part in 100 to 1 part in 500 (10 ml down to 2 ml per litre of water).\u003c\/li\u003e\n\u003cli\u003eFoliar spray: dilute 1 part in 500 (2 ml per litre of water).\u003c\/li\u003e\n\u003cli\u003eCompost tea: add to the brew alongside other plant extracts.\u003c\/li\u003e\n\u003cli\u003eStart at the weaker dilution on seedlings and cuttings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLearn more in fifteen seconds\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-44-potassium\"\u003ePotassium: what it does\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-31-foliar-feeding\"\u003eFoliars: fast fixes, then the soil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHandling and storage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWear gloves and eye protection, and wash hands after use.\u003c\/li\u003e\n\u003cli\u003eOnce opened, keep sealed in a cool dry place.\u003c\/li\u003e\n\u003cli\u003eStrong smell. Spray outdoors or with the extraction on, and foliar with the lights off or in the evening.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Seacliff Organics","offers":[{"title":"1L","offer_id":40856981340183,"sku":"SCOCOMF1LITER","price":30.0,"currency_code":"NZD","in_stock":true},{"title":"5L","offer_id":40856981372951,"sku":"SCOCOMF5LITER","price":119.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9104\/0361\/products\/SeacliffLiquidsFermentedComfreyExtract1_Seacliff.jpg?v=1747707848"},{"product_id":"seacliff-organics-liquid-potassium-silicate-1l","title":"Seacliff Organics Liquid Potassium Silicate","description":"\u003ch2\u003eLiquid Potassium Silicate\u003c\/h2\u003e\n\u003cp class=\"sc-lede\"\u003eLiquid Potassium Silicate is a concentrated solution of soluble silica and potassium, 7.8% SiO\u003csub\u003e2\u003c\/sub\u003e (3.6% silicon) and 4.7% K\u003csub\u003e2\u003c\/sub\u003eO (3.9% potassium) w\/v, ready to dose into irrigation water or foliar sprays. It suits growers who want plant available silicon without mixing the powder themselves.\u003c\/p\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: liquid mineral concentrate (silicon and potassium), 1 litre\u003c\/li\u003e\n\u003cli\u003eOrganic input status: not certified; a manufactured input. \u003ca href=\"\/pages\/organic-certificates#potassium-silicate\"\u003eSee the note on its organic status\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eAnalysis: silica 7.8% w\/v (3.6% Si); potassium 4.7% K\u003csub\u003e2\u003c\/sub\u003eO w\/v (3.9% K)\u003c\/li\u003e\n\u003cli\u003eUse for: soluble silicon in irrigation water and foliar sprays; raising water pH\u003c\/li\u003e\n\u003cli\u003eRate: soil 2.5 to 5 ml per 10 litres of water; foliar 2.5 ml per 10 litres\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eThis is our \u003ca href=\"\/products\/potassium-silicate\"\u003epotassium silicate powder\u003c\/a\u003e dissolved in water at 148 g per litre, made up here at Seacliff. Potassium silicate is one of the few forms of silica that dissolves in water, so the silicon in this bottle is in the form roots and leaves can take up straight away.\u003c\/p\u003e\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSupplies silicon in soluble form. Silicon is laid down in cell walls and stems, hardening them. Growers use it for sturdier plants, some resistance to mildew, and better tolerance of heat and water stress. Build it in early; it does not move once deposited.\u003c\/li\u003e\n\u003cli\u003eSupplies a small amount of potassium, 3.9% as the element.\u003c\/li\u003e\n\u003cli\u003eThe solution is alkaline, so a small dose raises the pH of irrigation water or a nutrient solution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAnalysis\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePotassium (K\u003csub\u003e2\u003c\/sub\u003eO) 4.7% w\/v (3.9% K, elemental)\u003c\/li\u003e\n\u003cli\u003eSilica (SiO\u003csub\u003e2\u003c\/sub\u003e) 7.8% w\/v (3.6% Si, elemental)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSoil applications: 2.5 to 5 ml of solution per 10 litres of water.\u003c\/li\u003e\n\u003cli\u003eFoliar spray: 2.5 ml of solution per 10 litres of water. Wet both sides of the leaf, with the lights off or in the cool of the day.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLearn more in fifteen seconds\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-54-silicon\"\u003eSilicon: what it does\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-30-soil-ph-water-ph\"\u003eSoil pH, water pH: how to move it\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-science#sc-31-foliar-feeding\"\u003eFoliars: fast fixes, then the soil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHandling and storage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWear gloves and eye protection, and wash hands after use.\u003c\/li\u003e\n\u003cli\u003eOnce opened, keep sealed and stored out of direct sunlight.\u003c\/li\u003e\n\u003cli\u003eThe concentrate is strongly alkaline: wear gloves and eye protection and keep it off skin. Always dilute it, and check the pH of the final feed or spray before it goes on, because even the label rate will push soft water above target. Do not mix the concentrate with acids or with calcium or magnesium salts, which precipitate the silicate; add it to the full volume of water last. Test a few leaves first.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Seacliff Organics","offers":[{"title":"1L","offer_id":40514988015639,"sku":"SCOLIQPOTSIL1L","price":30.0,"currency_code":"NZD","in_stock":true},{"title":"5L","offer_id":40514988048407,"sku":"SCOLIQPOTSIL5L","price":130.0,"currency_code":"NZD","in_stock":true},{"title":"20L","offer_id":40856796004375,"sku":"SCOLIQPOTSIL20L","price":479.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9104\/0361\/products\/SeacliffLiquidsLiquidPotassiumSilicate1_Seacliff.jpg?v=1670547860"}],"url":"https:\/\/seaclifforganics.nz\/collections\/amendments-potassium.oembed","provider":"Seacliff Organics","version":"1.0","type":"link"}