Featured
Fungi Ally
Best for: Log growers & intermediate cultivators Maine-based mushroom farm founded in 2012 by educator Willie Crosby. Sawdust and plug spawn in named cultivar strains, a line of 6 lb grow kit blocks, and bulk 100%-fruiting-body mushroom powders — backed by a deep blog and a Mushroom Academy class program.
Categories: Spawn, Kits
Ships to: US
Price: $$
Maine-based spawn productionNamed cultivar strains (3015, LE 46, AM1)100% fruiting-body bulk powders
Featured
North Spore
Best for: Hobbyists & intermediate growers One of the most recognized names in North American mushroom cultivation. USDA-certified organic spawn, a wide strain catalog from beginner kits to named plate cultures, and same-day fulfillment from their Portland, Maine facility.
Categories: Spawn, Kits, Equipment, Cultures, Substrate
Ships to: US · Canada
Price: $$$
USDA organic certifiedWide strain selectionStrong education content
Featured
Out-Grow
Best for: DIY growers Family-run Illinois supplier operating since 2009. Deep culture library of 36+ liquid culture species at a flat $12, plus grain spawn, plug spawn, bulk substrate, and sterile-lab equipment — the full DIY cultivation stack from one cart.
Categories: Spawn, Substrate, Cultures, Kits, Equipment
Ships to: US
Price: $$
36+ liquid culture species at $12Family-owned since 2009Made-to-order in Illinois
Booming Acres
Best for: Bulk grain & substrate Mundelein, Illinois supplier focused on bulk sterile grain bags, sterilized substrate, and the in-house 'Magical' all-in-one grow bag line. Catalog runs deep on the consumables side — rye, oats, milo, CVG, hardwood sawdust, and Master's Mix in 3 lb, 5 lb, and 25–30 lb pack sizes — at the lowest per-bag pricing of any direct-to-consumer supplier currently in the directory.
Categories: Spawn, Substrate, Kits, Cultures, Equipment
Ships to: US
Price: $
Lowest per-bag grain & substrate pricing in the directory3 lb / 5 lb / 25–30 lb bulk pack ladder on every consumableFree US shipping over $150
Cascadia Mushrooms
Best for: Organic-focused hobbyists & gift buyers Family-run, USDA-certified organic mushroom farm in North Bellingham, Washington. Founded in 2005 by Alex Winstead, it supplies two dozen Pacific Northwest restaurants and grocers alongside a direct-to-consumer line of 6 lb grow kits, plug spawn, dual-extraction tinctures, and dried culinary mushrooms.
Categories: Spawn, Kits, Equipment
Ships to: US
Price: $$
USDA Organic certifiedFamily-run farm since 2005Pacific Northwest (Bellingham, WA)
Field & Forest Products
Best for: Log growers & outdoor cultivators Family-owned Wisconsin spawn producer, founded in 1983 by Joe Krawczyk and Mary Ellen Kozak. Certified-organic sawdust, grain, and plug spawn with deep volume discounts, a full outdoor-log toolkit, and a Table Top Farm line of $28 indoor kits.
Categories: Spawn, Kits, Cultures, Substrate, Equipment, Books
Ships to: US · Canada · Intl
Price: $$
Certified-organic spawn since 1983Pioneered organic log-cultivation standardsDeep bulk discounts across all spawn forms
Midwest Grow Kits
Best for: Equipment & fruiting chambers Illinois-based mushroom cultivation supplier operating since 2011 (with parent company Midwest Organics supplying commercial substrate since 2003). Specializes in growing mediums, fruiting chambers, and lab equipment — not spores. Known for the proprietary MycoClimate automated monotubs, Ecosphere tiered fruiting systems, and a catalog that scales from starter kits up to wholesale and commercial-grade autoclaves.
Categories: Spawn, Substrate, Equipment, Kits, Cultures
Ships to: US · Canada · Intl
Price: $$
No spores sold — growing mediums onlyProprietary MycoClimate & Ecosphere fruiting chambersEquipment up to commercial scale
Seismic Spore
Best for: Budget DIY growers Family-owned Hillsboro, Oregon supplier operating since 2020. Gourmet liquid culture syringes at a flat $10 across six species, a broad grain-spawn range (rye, milo/sorghum, corn, BRF, and house blends), all-in-one grow bags, bulk CVG substrate, and MEA agar plates — all made in-house.
Categories: Spawn, Substrate, Cultures, Kits
Ships to: US
Price: $
Family-owned since 2020Made in-house in Hillsboro OR$10 liquid culture syringes