Mushroom compost cheap right now, add to leaves or wait?
I have a raised bed in process, It's filled with finely mulched leaves and used potting soil. I've been adding leftover veggies, coffee/tea grounds and stale bread I started it in Oct. but it hasn't broke down much, too cold. The birds have been adding N while eating the bread. ;)
I bought some mushroom compost from Lowes last week on clearance,cheap, $2 a bag.
Would adding the compost now help or be a waste? Should I wait until planting time?