Where to Buy Mushroom Growing Supplies

Where to buy mushroom spawn

Mushroom spawn comes in several forms — grain spawn for indoor sterile workflows, sawdust spawn for outdoor logs and garden beds, and plug spawn for log inoculation. The right supplier depends on which form you need and how much you're buying.

• North Spore — broad lineup across every spawn form (grain, sawdust, plug) at $19.99–$29.99 each. 26 species with USDA Organic certification on all spawn.
• Out-Grow — every spawn form plus 200+ liquid cultures. Grain spawn from $16.95 (1 qt jar) to $29.95 (6 lb bag), plug spawn at $12.95 per 100 ct.
• Field & Forest Products — volume discount tiers across every spawn form. Sawdust drops $28 → $18 at 16+ bags; plug spawn $50 → $40 per 1000 ct. Best per-unit pricing if you're buying bulk.

For grain spawn specifically, see the dedicated section below. For log inoculation, see Where to buy mushroom plugs and dowels.

Where to buy grain spawn

Grain spawn — sterilized rye, milo, oats, or BRF inoculated with mushroom mycelium — is the standard input for indoor cultivation workflows. Some suppliers sell sterilized grain bags (you inoculate yourself); others sell live grain spawn (already colonized).

• Booming Acres — among the lowest per-bag pricing. Sterilized grain bags from $9 (3 lb) to $17.95 (rye), live species-specific grain spawn $15–$20 per bag, 30 lb bulk packs at $59.50–$79.50.
• Out-Grow — broadest grain variety. Rye, red milo, white milo, popcorn, BRF, Mega Mix, and oat in 1 lb, 3 lb, and 5 lb formats. Sterilized grain jars from $10.95.
• Field & Forest Products — volume discount tiers on live grain spawn. $25 single, $22 at 6+ bags, $18 at 16+ bags.

Where to buy mushroom plugs and dowels for log cultivation

Plug spawn — mushroom mycelium grown into hardwood dowels — is the standard for inoculating outdoor logs. Drill, tap them in, seal with wax, and let the log fruit for three to five years. The right supplier depends on species selection and quantity.

• Field & Forest Products — 9 plug spawn species (Shiitake, Lion's Mane, Reishi, Oyster, Chestnut, Nameko, Turkey Tail, Comb Tooth, Olive Oysterling). Volume discounts on 1000 ct bags: $50 single, $45 at 6+, $40 at 16+. Pair with their cheese wax, inoculation tools, and drill bits for a complete log toolkit.
• North Spore — 11 plug spawn species at $19.99 per bag. Also sells angle grinder adapters, drill bits, and a Sawdust Spawn Thumb Press tool for higher-volume inoculation.
• Fungi Ally — birch-dowel plug spawn with named cultivar disclosure (Blue Oyster 3015, Shiitake LE 46). From $16.50 per 100 ct bag — useful if you want to compare strain trial notes.

See the shiitake or reishi species guides for the log inoculation process, or the shiitake log cultivation guide for a deeper technique walkthrough.

Where to buy all-in-one mushroom grow bags

All-in-one (AIO) mushroom grow bags combine sterilized grain spawn and bulk substrate in a single injection-port bag. Inoculate with a liquid culture syringe, wait for full colonization, and fruit directly from the bag — no separate substrate transfer needed.

• Booming Acres — the in-house Magical line at $24 single (5 lb), dropping to $19.10/bag in 5-packs and $19.20/bag in 10-packs. The Delicious Master's Mix line covers wood-loving species at $20–$25 single.
• Redwood Mushroom Supply — Wood-Lover AIO at $21.99 and Dung-Loving AIO at $29.99, backed by an in-house lab contamination warranty (free replacement of AIO bags within 30 days of purchase, with photo proof).
• Out-Grow — broad AIO lineup across 8+ substrate types (manure, wood, BRF, mega mix, golden grain, milo, etc.) plus a 10 lb XL bag at $45.

See the grow bags equipment guide for choosing between AIO bags and standard fruiting bags.

Where to buy mushroom liquid cultures

Liquid culture syringes contain live mushroom mycelium suspended in nutrient broth, ready to inject into sterilized grain bags or jars. They're the lab-side input most home cultivators graduate to after their first kit grow.

• Seismic Spore — $10 flat across 6 species (Blue Oyster, King Oyster, Lion's Mane, Pink Oyster, Pioppino, Shiitake). The cheapest legitimate liquid culture available.
• Out-Grow — $12 flat across 200+ species. The deepest liquid culture catalog, including uncommon species like Agarikon, Black Truffle, Giant Puffball, and several Cordyceps variants.
• Booming Acres — $12 across 8 gourmet species.
• North Spore — $19.99 across 22 species. Premium pricing for USDA Organic certification, and pairs with their plate culture line ($74.99) if you're building a culture library.

Where to buy mushroom grow kits

Mushroom grow kits are pre-inoculated and pre-colonized substrate blocks — cut a slit, mist a few times a day, harvest in 7 to 14 days. They're the easiest way to start growing without sterile technique or specialized equipment.

• Cascadia Mushrooms — 10 species at a flat $30, all USDA Organic. The widest kit variety with unusual options like Cosmic Queen Oyster, Italian Oyster, Coral Tooth, and Reishi Antler.
• Redwood Mushroom Supply — 7 species at $29.99 each. Ready-to-fruit kits replaced free if they fail to fruit within 30 days, provided storage and fruiting instructions were followed.
• Out-Grow — wide kit lineup from $14.95 (Quick Kit) to $64.95 (Mono Tub Grow Kit). Single-species kits at $35.95 for Lion's Mane, Pink Oyster, Pearl Oyster, and Brown Oyster.
• North Spore — Spray & Grow kits at $29.99 (4 species) and ready-to-fruit fruiting blocks at $29.99 (10+ species).

See the beginner's growing guide if you're new to kit cultivation.

Frequently asked questions