Our Multi-purpose with John Innes has been comprised of a nutrient rich composition based on a traditional recipe of loam, peat and horticultural grit with added nutrients. By including loam it adds increased water retention and nutrients to plants in the compost. Our multi-purpose with John Innes has a pH of 5.5-6.0 and added with a base fertiliser which creates an optimum medium for most plants to grow apart from the acid loving Camellias etc