Organic Lion's Mane Mushroom Grow Kit (3.5 lb)
A 3.5 lb pre-colonised organic substrate block that produces a dense, cascading cluster of lion's mane mushrooms in a humid bin on your counter.
The short version
A 3.5 lb pre-colonised organic substrate block that produces a dense, cascading cluster of lion's mane mushrooms in a humid bin on your counter. Open the front panel, mist daily, and cut your first cluster in 10-14 days.
Why grow with us
Watch it grow
From block to harvest in 3D
Scrub the timeline and see exactly what is happening inside the block, day by day.
Day 0
Colonisation
The block arrives alive
Your substrate is already fully colonised with white mycelium. There is nothing to inoculate and nothing to sterilise - open the bag and move on.
Watch it happen
Videos from real growers
Unboxing, planting and harvest footage shot on our own blocks.
How to grow it
Step by step, no guesswork
Open the panel
1 minute
Punch out the front panel and cut a small X into the inner substrate bag. Do not remove the liner - it holds humidity around the cluster.
Mist and cover
30 seconds a day
Mist the opening lightly, fold the bag back over the block and keep the humidity high. Lion's mane likes a humid bin with a little fresh air.
Harvest
Day 10-14
Cut the cluster at the base with a clean knife when the spines are still slightly soft and the whole mass is a single piece. Wait a few extra days if you want the classic dense pom-pom rather than a loose spray.
What is in the box
- One 3.5 lb fully colonised organic substrate block
- Resistive humidity bag liner
- Step-by-step instruction card
- Access to our grow support team
Certificate of Analysis
Lab verifiedNorthwest Analytical Labs · Batch GWM-26-0814 · Tested 2026-08-14
Specifications
| Variety | Lion's Mane (Hericium erinaceus) |
|---|---|
| Weight | 3.5 lbs (1.58 kg) |
| Substrate | Organic hardwood sawdust, wheat straw and rye grain |
| Environment | Indoor, partial shade / indirect room light (all season) |
| Origin | Made in the USA |
| First harvest | 10-14 days after opening |
| Expected harvests | 2-3 flushes per kit |
| Humidity | 85-95% recommended |
| Shelf life | 14 days sealed in the bag |
FAQ
Questions, answered
Verified reviews
What growers say
Reviews from customers who harvested their own mushrooms.
First harvest in nine days
“Bought this as a total beginner and had a full cluster on my counter a week and a half later. The instructions were actually clear.”
Way more than I expected
“The block is heavy and arrived properly colonised. Two flushes so far and the second one was bigger than the first.”
Great, but read the humidity notes
“Support replied the same day with a humidity tip and it solved it. Cluster looked exactly like the photos on the product page.”
Our promise
If it does not grow, we replace it
Mushroom growing depends on temperature, humidity and a little bit of luck. If our block fails, that is on us, so we send another one. We have never refused a replacement request.
Read the guaranteeShips within 2 business days
Packed in breathable mycelium bags with insulation, so your block arrives alive and colonised.
90-day grow guarantee
If it does not fruit, send us a photo and we ship a replacement. Free, no questions, no return needed.
Third-party lab tested
Every batch screened for heavy metals, pathogens and microbial load. Certificate of Analysis published.
Real mycologists on support
Send a photo of your grow and get a specific answer from someone who has run thousands of blocks.
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