This material is produced under carefully controlled conditions and is a by-product of the mushroom growing industry. The basic ingredients of this compost are horse manure, poultry manure and wheat straw. Before collection from the mushroom farm, the compost is steam sterilised by the mushroom grower.
This guarantees that the compost will contain no pests, diseases or weed seed that would otherwise cause problems to the landscaper or gardener. The material is approximately neutral with a pH of 6.3 to 6.8. It is a first class soil conditioner for all types of soil.
Recommended rate of use for general soil improvement a 50mm layer should be spread over the area to be treated, then forked or rotavated in. A 75mm layer could be considered with very poor soils.