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  • Blue Oyster Colonized Grain Spawn — 3 lb

Blue Oyster Colonized Grain Spawn — 3 lb

Colonized Grain Spawn

$24.99

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

Grain fully colonized with vigorous Blue Oyster mycelium. Mix directly into your bulk substrate. Longmont, CO lab-grown.
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 3.75 lbs

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

5.0
★★★★★
Based on 24 reviews
5 ★ 100%
4 ★ 0%
3 ★ 0%
2 ★ 0%
1 ★ 0%
★★★★★
February 13, 2026

Wonderful! My whole family loves it and uses it daily.

ZD
Zoe D.
Verified
★★★★★
August 24, 2026

Just alright. Might look elsewhere next time.

SG
Steven G.
★★★★★
August 24, 2026

Top notch. Better than I expected, honestly.

BK
Brian K.

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