I just top dress my fruit trees, flower plants twice a year, spring and fall. Right now I buy G&B Soil Building Conditioner every year to do that.
Here's the breakdowns of their mushroom compost
================
Compost Composition
Compost ingredients used may include:
Straw
Straw horse bedding
Cottonseed meal
Peat moss
Pistachio shells or almond shells
Gypsum
May contain wood chips/sawdust
pH 6.62
bulk density 574.73 lbs./cubic yards
Relative Value of Compost to Commercial Fertilizers
Numbers are calculated from a wet volume basis.
1 ton MC (equivalent to 3.5 cubic yards)
Nitrogen = 22.27 lbs./ton
Phosphate = 13.29 lbs./ton
Potash = 24.70 lbs./ton
Approximate weight: 30-35 lbs per cubic foot. 810-945 lbs per cubic yard
