Demystifying John Innes No. 3 Compost: A Nutrient-Rich Mix for Mature Plants
For gardeners wanting to provide optimal nutrition for container-grown plants, John Innes No. 3 compost is a top choice. Developed in England in the 1930s, the John Innes system features science-based compost blends ideal for potting and repotting. The numbers refer to the formula’s nutrient levels, with No. 3 having the highest fertility for mature … Read more