Seacliff Organics Balanced Bulb Food

Seacliff Organics Balanced Bulb Food

A high phosphorus bulb fertiliser made from fish bone meal, sulphate of potash and BioAg TM-7. It suits spring and summer flowering bulbs in garden beds and pots.

At a glance

• Type: fertiliser blend (dry, high phosphorus, for bulbs)
• Analysis: NPK = 3.5 - 25.4 - 2.7 (N, P₂O₅, K₂O); elemental 3.5 - 11.1 - 2.2, calculated from the recipe
• Also supplies: about 21.7% calcium and 1.3% sulphur
• Use for: flowering bulbs in garden beds, borders, pots and containers
• Rate: half a cup per square metre at planting, mixed with compost

What it is

A simple three ingredient blend made by Seacliff Organics in Otago: fish bone meal, sulphate of potash and BioAg TM-7, which brings humic and fulvic acids with seven chelated trace elements (iron, manganese, zinc, copper, boron, molybdenum and cobalt).

What it does

• Phosphorus and calcium from fish bone meal. Phosphorus is used for energy transfer, root growth and flowering; calcium builds cell walls and root tips.
• A small amount of potassium and sulphur from sulphate of potash.
• Trace elements and humic substances from TM-7.
• The meal releases slowly as soil life breaks it down, so it is placed with the bulb at planting rather than fed often.

Analysis

Typical analysis, % by weight:

• Nitrogen (N) 3.4%
• Phosphorus 25.4% as P₂O₅ (11.1% elemental P)
• Potassium 2.6% as K₂O (2.2% elemental K)
• Calcium (Ca) 21.7%
• Magnesium (Mg) 0.39%
• Sulphur (S) 1.3%
• Iron (Fe) 0.10%
• Manganese (Mn) 0.10%
• Zinc (Zn) 681 mg/kg
• Copper (Cu) 267 mg/kg
• Boron (B) 319 mg/kg
• Molybdenum (Mo) 86 mg/kg
• Cobalt (Co) 43 mg/kg
• Selenium (Se) 0.6 mg/kg

Calculated from the batch recipe and the ingredient certificates (October 2026). A laboratory analysis of the finished blend will differ a little from these figures.

How to use

• Incorporate into soil, or top dress through the growing season.
• Garden beds: when planting, apply half a cup per square metre of garden combined with compost. Mix thoroughly into the soil.
• Established plants: apply half a cup per square metre mixed with compost, and water in well after application.
• Pots and containers: apply half a cup per 30 cm of pot diameter. Spread evenly over the soil, avoiding the plant stem, and water in well after application.

Learn more in fifteen seconds

• Phosphorus: what it does
• Phosphate stays where it lands
• Too much P turns mycorrhizae down

Handling and storage

• Wear a mask to avoid inhaling particles and open in a well ventilated area.
• Wear gloves and eye protection, and wash hands after use.
• Once opened, keep sealed and dry.