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This compost is a combination of composted straw, horse manure and supplemental nutrients. Originally designed to meet the stringent nutritional and structural media requirements for mushroom growers, this formulation is excellent for soil amendment use in the landscape.
The high nutrient values are excellent for inducing plant growth and health and the structural characteristics are ideal for loosening and improving the heavy soils prevalent in the Chicago area.
The availability of soluble nitrogen in Mushroom Compost is relatively low, which means no burn, but total nitrogen is present in such a form that it will be released as further decomposition takes place. Phosphate, potassium, calcium and magnesium are quite high. Salinity is well below that of typical manure. The micro-element content is good for copper, high for zinc, manganese and iron, and slightly low for boron.