EastScape Wikibuilt from the game itself
Void morel spawn
“Plant it in a fungus bed in your cellar (Fungiculture 80) with 3 compost. It grows void morel, and gives spawn back.”
How to get it
- Scraped up with the shroom 35% of the times you pick wild Void morel (Fungiculture 80), and given back by every bed you harvest.
Grows
Plant it in a fungus bed in your cellar (Fungiculture 80, 3 compost): grows 
Void morel in about 300 minutes, and gives spawn back.