5-10mm
Pumice is a popular replacement for perlite. Not only does it provide the important aeration needed in healthy soils, it also lasts longer than perlite and has more minerals.
Recommended for use with Potting Mix and other soils, pumice's porous qualities allow for maximum aeration as well as moisture drainage, letting your roots grow freely.
Bulk is available in 500kg and 1000kg quantities, email us at store@seaclifforganics.nz for a quote!
Pumice can be supercharged in a nutrient tea, in much the same way as biochar.
We recommend using between 10% to 30% in most soil mixes for veggies and flowers.