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  • Blue Oyster Colonized Grain Spawn — 6 lb

Blue Oyster Colonized Grain Spawn — 6 lb

Colonized Grain Spawn

$39.99

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

Large-format Blue Oyster colonized grain. Vigorous mycelium for high-yield substrate runs. Unicorn filter patch.
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 7 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 27 reviews
5 ★ 100%
4 ★ 0%
3 ★ 0%
2 ★ 0%
1 ★ 0%
★★★★★
August 13, 2025

Reliable and well made. No major complaints, highly pleased.

SD
Sophia D.
Verified
★★★★★
February 4, 2026

Better than expected! Sturdy, practical, and well finished.

SB
Steven B.
Verified
★★★★★
August 23, 2026

Decent enough. Had higher hopes but it works.

AC
Andrew C.

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