Mushroom compost can often be bought cheaply in bulk for use as a soil conditioner or mulch. However, it often contains some peat which is no longer recommended for horticultural use due to the damage to peatland ecosystems which contribute to climate change. It is usually available as ‘spent’ mushroom compost, referring to the fact it is the compost left over from mushroom farming.
Use it in the vegetable and ornamental garden
It is alkaline in nature
Avoid using mushroom compost around ericaceous (acid-loving) plants
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.