Specially designed substrate to achieve maximum drainage with high water holding capacity in small pots. Premium Materials • Coco fibre, perlite, bark and pumice are all premium graded material to specific particle sizes.• Designed to assist with high levels of drainage and air fill porosity. AFP & Drainage • Pumice is a very porous material, this mineral stone is great for buffering water and nutrients. • Perlite has a light weight porous structure that will maintain a high air fill porosity through a range of irrigation systems. Water Holding Capacity• White Peat Fraction 1 means that very fine material has been removed. This makes Fraction 1 great for water holding capacity while maintaining good drainage at the same time.• Irish peat is a coarse peat that has moderate water holding capacity that can maintain good structure for AFP. Composition Per m³ White Peat FR1 0.35m³ Baltic black peat Middle 0.10m³ Coco Fibre 0.15m³ Perlite 3 0.20m³ Bark Fraction 0 0.15m³ Pumice 0.05m³ Lime 5Kg TBF 17:10:14-4 0.50Kg