Your first mushroom grow — a complete kit, start to harvest

What you'll do

Stages

1. 1

   Unbox + inspect

   Day 0 of cycle

   Open the kit, photograph the colonized block, look for any green/black contamination (rare in commercial kits but real). The block should be uniformly white with the species' characteristic mycelial pattern — fluffy for oyster, fuzzy for lion's mane.

   Supplies for this stage

   • Lion's Mane Grow Kit · $35
   • grow-kit-oyster

   Pitfalls

   • •Don't open the inner bag yet — exposing colonized substrate to room air invites contamination
   • •If you see green or black patches >1cm, contact the producer; do not attempt to fruit a contaminated block

   Success signal

   Block is solid white, smells faintly of mushroom (not sour/ammonia)

2. 2

   Cut the fruiting hole + spray

   Day 1 of cycle

   Most kits come with instructions to cut an X-shape or rectangle through the bag where you want fruit bodies to emerge. Do this with a clean knife. Place the kit somewhere with indirect light (a kitchen counter is fine — direct sun cooks them). Spray the cut surface with distilled water 2-3x daily.

   Supplies for this stage

   • Misting Spray Bottle (32 oz, fine mist) · $15
   • Distilled Water (1 gal) · $4

   Pitfalls

   • •Tap water with chlorine can stress mycelium; use filtered or distilled
   • •Don't soak — mist. Standing water on the cut breeds bacteria

   Success signal

   Cut surface stays moist between sprays; mycelium begins to thicken at the edges

3. 3

   Pinning

   Day 7 of cycle

   Within 5-10 days, tiny mushroom primordia (pins) appear at the cut. They're 1-3 mm and look like dense white knots. This is the most exciting moment of your first grow. Don't disturb them. Continue light misting 2-3x daily. Add brief fanning (open a door, wave a magazine) for 30 seconds twice a day to give them fresh air — pinning is a CO2-vs-O2 trigger.

   Pitfalls

   • •Aborting pins (they shrivel and turn blue/grey) usually means too dry or too still — increase misting frequency and FAE

   Success signal

   Pins continue to grow, doubling in size every 24 hours

4. 4

   Fruit body development

   Day 12 of cycle

   Pins become recognizable mushroom shapes — caps for oyster, bushy clusters for lion's mane. Fruit bodies double in size daily under good conditions. Keep humidity high (a clear plastic dome over the kit with vent holes works fine). Mist twice daily.

   Pitfalls

   • •If caps are abnormally long-stemmed and small-capped, your FAE is insufficient — open the dome or add holes
   • •If fruit bodies crack or look dry, increase humidity

   Success signal

   Recognizable mushroom shapes, growing rapidly

5. 5

   Harvest

   Day 18 of cycle

   Harvest just before spore release. Oyster: when caps flatten and edges turn slightly upward. Lion's mane: when spines (the dangling teeth) are 1cm long but before they yellow. Twist gently at the base or cut with a clean knife at substrate level. Weigh your harvest. Most kits produce 1-3 flushes — soak the block in cool water for 12 hours after the first harvest to trigger flush 2.

   Supplies for this stage

   • Digital Kitchen Scale (0.1g resolution) · $22

   Pitfalls

   • •Letting them release spores indoors stains everything with brown/white powder — harvest before this happens

   Success signal

   Fresh harvest in your hand, weighed and photographed