Rock phosphate

Natural phosphorus, applied before planting, for strong roots and vigorous flowering.

What it's for: A fully organic source of phosphorus (33% P₂O₅) and calcium (45% CaO). Phosphorus is the element behind root formation and proper, vigorous flowering — the foundation of the plant's yield potential.

Best for: Bed preparation and planting holes. The organic alternative to superphosphate.

When to apply: Before establishing the crop.

How often: 1 time per growing cycle.

Dose: 50 g/m².

How to apply: Spread and work into the soil before planting.

Worth knowing: Slow release — which is why it goes in before, not during. It will not fix a deficiency mid-season.