CULINARY CULTIVATION
GROW GOURMET AT HOME
Oyster, lion's mane and shiitake, from grain spawn to harvest. Culinary species only.
Shopping for your first grow?
The Oyster Mushroom Starter Shopping List lists everything for about $150, in the order you'll use it.
Clean work & sterile technique
Contamination is the #1 failure. Work in still air (a still-air box or a flow hood), wipe surfaces, tools and gloves with 70% isopropyl alcohol and let it dry completely before flame-sterilizing tools (never bring a flame near wet alcohol), and keep lids closed. Sterilize grain and supplemented substrates in a pressure cooker. Simple pasteurization is fine for straw.
Grain spawn
Hydrate grain (rye, millet or oats), drain it to surface-dry, jar it with a filter patch, then pressure-sterilize. Inoculate with liquid culture or agar from a reputable culinary-culture supplier. Shake when about 30% colonized.
Substrates by species
- Oyster: pasteurized straw or a hardwood + soy hull mix. Forgiving and fast.
- Lion's mane: supplemented hardwood sawdust. Fruits best from a small hole in the bag.
- Shiitake: supplemented sawdust blocks or hardwood logs. Needs a long "browning" stage.
Fruiting conditions
High humidity, plenty of fresh air (too much CO₂ gives long stems and small caps), and indirect light. Mist without flooding. Harvest oysters just before the cap edges flatten, and lion's mane while the spines are short and white. To keep a big flush, slice and dry it at low heat in a food dehydrator (the one I use).
Contamination field guide
- Green mold (Trichoderma): toss the block outside the grow area. It spreads.
- Sour smell, slimy grain (bacteria): grain was too wet. Dry it better next time.
- Fuzzy grey "cobweb": raise fresh air exchange and lower surface wetness.
- Yellow liquid (metabolites): often harmless stress. Watch for mold.
Written from general gourmet cultivation practice. Photos are coming soon. Not covered here: anything psychoactive, spores, or Amanita.
Gear we'll recommend
Our equipment guides: starter kits by budget, gear by category and what a grow tent costs to run.
Starter kit guide