Little Farm Land
5 minutes
Spent Mushroom Compost Is Alkaline and Salty, So Keep It Off Blueberries
After a mushroom crop the straw-manure substrate holds added gypsum and chalk, so it usually tests about pH 7–8 with high soluble salts. Weathered for a few months it suits a clay vegetable bed; spread on a blueberry bed (wanting pH 4.5–5.5) it raises pH.