Blue Oyster Fruiting Block
Pleurotus ostreatus
Quantity
What's in the box
5lb Colonized Block
Fruiting-Ready Filter Bag
Instruction Card
Viable culture guaranteed. If it arrives damaged, dead, or visibly contaminated, contact us within 48 hours with photos and we'll arrange a replacement or refund.
Cultivation Specs
Colonization Time
Pre-colonized — ready now
Fruiting Temp
55–65°F / 13–18°C
Ideal Substrate
Hardwood sawdust, straw (pre-colonized)
Expected Yield
3–4 flushes, 25%+ BE
Growing Method
Indoor
Key Benefits
Immune Activation
Beta-glucans (25–30% dry weight) bind Dectin-1 receptors on macrophages and NK cells — 300+ peer-reviewed studies
Cholesterol Balance
Natural lovastatin reduces LDL by 7–10% in controlled studies — same mechanism as pharmaceutical statins
Mitochondrial Defense
Ergothioneine concentrates in mitochondria and protects against oxidative damage — a longevity biomarker
Complete Protein
30% protein by dry weight, all essential amino acids, PDCAAS score comparable to beef
Already colonized, already easy — this is the lowest-effort way to grow mushrooms at home. Our Blue Oyster block arrives fully colonized with Pleurotus ostreatus on hardwood sawdust and straw. Cut it open, mist, and get your first pins within a week.
Blue Oyster is famously forgiving — the block tolerates temperature swings and inconsistent misting better than any other species we carry, which is why it's the block we recommend for a first-timer or a gift. Expect 3–4 dense flushes at 25%+ biological efficiency over 6–8 weeks.
Each block: 5lb pre-colonized Blue Oyster substrate, sealed and ready to fruit. Store in a cool spot out of direct sun until you're ready to cut it open.