Fine, odourless and fully stabilised, so it can go straight into a pot mix without burning roots. Improves structure as much as it feeds.

Feeds slowly and suppresses soil nematodes and grubs as it breaks down. The standard basal amendment before a vegetable crop.

A fast-acting organic nitrogen source. Most growers steep it in water for a week and use the strained liquid as a feed.

Slow-release phosphorus and calcium for flowering and root crops. Works over months rather than weeks, so apply at planting.

Bulk organic matter for opening up heavy soil and holding moisture in light soil. Fully composted, so it will not scorch.

Richer in nitrogen than cow manure and pelleted for clean handling. Apply two weeks before sowing rather than at sowing.