Envirogrow provides your potato plants with everything they need to help produce a healthy and high-yielding crop by releasing nutrients as and when the crop requires it. It contains more Nitrogen, Phosphorus and Potassium than any other potato fertiliser in the marketplace (14-10-18). Biodegradable, water-soluble and leaves no adverse environmental footprint. A 1kg tub is enough for just over 2.5kg of seed potatoes.