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Sterilized Mushroom Grain Spawn (Multiple Sizes)

Grow Supplies

Price range: $21.99 through $199.99

In stock · Free shipping on orders over $75 · Live arrival guaranteed

Kickstart your mushroom cultivation with sterilized grain spawn made from a nutrient-rich blend of organic grains. Choose your weight and quantity, from home grows to larger batches.
Clear
Buy with
Or 4 interest-free payments. Ships from Longmont, CO.
Live arrival guarantee

Arrives healthy or we replace it free

Lab-tested clean

Every lot checked for contamination

Fast nationwide shipping

Free over $75 · 1–2 day handling

Colorado small-batch

Grown with care, never at scale

What's included & how it works

Each kit arrives as a fully-colonized block ready to fruit — no sterile technique, no extra gear.

  • Cut the marked window and mist 2–3× daily
  • First pins appear in days; harvest in 1–2 weeks
  • Re-mist for a second and third flush
  • Includes step-by-step printed instructions + a link to our video guide

Additional information

Weight

3 lbs, 6 lb
Quantity

Single Pack, 2 Pack, 4 pack, 8 pack

We ship Monday–Wednesday to keep your order moving over the weekend. Orders over $75 ship free. If your living product arrives unhealthy, send us a photo within 48 hours and we’ll replace it free — no questions asked.

Verified reviews

What growers are
saying

Share your experience

4.7
★★★★★
Based on 20 reviews
5 ★ 70%
4 ★ 30%
3 ★ 0%
2 ★ 0%
1 ★ 0%
★★★★★
December 21, 2025

Arrived well packaged and works flawlessly. Truly remarkable quality!

EH
Ella H.
Verified
★★★★★
April 18, 2026

Beautifully made and arrived earlier than expected. Absolutely delighted!

MT
Michael T.
Verified
★★★★☆
November 24, 2025

It works, but the quality feels a little cheap.

LH
Laura H.

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