Growmore Multi purpose Compost with added John Innes 60L

John Innes composts weigh much more than other types of potting compost as the key ingredient is loam, or soil, along with peat or peat substitute, sand, and fertilizer. Loam used in compost is usually made of a mix of sand, silt, and clay, and is sterilised to kill weed seeds, pests, and diseases.

The advantage of loam is that it provides a steady supply of nutrients and water, is free draining, with good structure and aeration. This good absorption and release of water and nutrients is sometimes referred to as having a high level of “buffering”.