Use Your Spent Grow Block for Compost

You've cared for your mushroom grow block, maybe even attempted to grow a second flush of mushrooms! Now what? What do you do with this ten pound block of sawdust and grain sitting on your kitchen counter? Use it as compost!

Mushroom Compost


3 Beautiful Benefits of Grow Block Compost:

  1. Using your spent grow block as compost minimizes waste. Instead of throwing out your block, use all that healthy fungi to fuel your garden!
  2. The primary ingredient in your grow block is red oak sawdust. Most home compost piles need more brown matter, like this sawdust, to balance the high nitrogen level of the food scraps. 
  3. Compost rich in fungal matter hosts more beneficial nematodes which help make nutrients bio-available for garden plants.  

How to Use Your Block for Compost:

  1. If you have not already, remove the plastic bag surrounding the spent mushroom grow block.
  2. Crumble the grow block into your compost bin. 
  3. Or place the whole block in your garden under a plant. The grow block will act as slow-release fertilizer while the worms slowly decompose it.