EC Fertilizer 6% iron-based solution (sulphate) enriched with aluminium sulphate, permitted in organic farming. It is a specific product to prevent and treat the leaves yellowing (iron-induced chlorosis). The product helps also getting brighter colours of the flowers, more specifically the addition of aluminium sulphate encourages the pigmentation of hydrangeas. Use: dilute the content of one cap in 3 litres water and evenly water the soil with this solution.