Gear guide
Best outdoor mushroom growing kits and spawn for garden beds
Picked from Amazon listings, not hands-on tests. How we pick
An outdoor mushroom growing kit is not a box that fruits on a counter. It is spawn, the living mycelium you mix into a mulched bed or tap into a log, and the wait is measured in months and depends on the weather. For garden beds the usual species is wine cap: sawdust spawn is layered into 3 to 5 inches of hardwood chips or 6 to 8 inches of straw, a 5 lb bag covers about 16 to 25 square feet, and beds fruit in 2 to 10 months. Grain spawn exists too, but grain used outdoors attracts animals, which is why beds are normally planted with sawdust spawn. The other outdoor route is plug spawn: wooden dowels tapped into holes drilled in fresh hardwood logs, with a spawn run (the colonization period) of about a year. This guide compares five listings by species, spawn form, what the seller says to grow it on and the stated time to first harvest. Nothing here was grown by us: the details come from the listings. Golden oyster is left out because it is an indoor species.
Compare the picks
| Pick | Species | Form | Grown on | First harvest | Price | Link |
|---|---|---|---|---|---|---|
 North Spore organic wine cap sawdust spawn | Wine cap | Sawdust spawn | Outdoor bed, hardwood chips | As little as 2 months | - | Amazon |
 North Spore lion's mane outdoor log kit, 100 plugs | Lion's mane | Plug spawn kit, 100 plugs | Hardwood logs | About 12 months to colonize | - | Amazon |
 2funguys grey dove oyster plug spawn, 100 count | Grey dove oyster | Plug spawn, 100 count | Hardwood logs or stumps | 6-15 months | - | Amazon |
 Root Mushroom Farm wine cap sawdust spawn | Wine cap | Sawdust spawn | not stated | not stated | - | Amazon |
 Liquid Fungi wine cap grain spawn, 1 lb | Wine cap | Grain spawn, 1 lb | Pasteurized straw | not stated | - | Amazon |
Facts are taken from each Amazon listing. Prices are checked daily and shown with their date.
If you just want one
- Closest match for the jobNorth Spore organic wine cap sawdust spawnListing states wine cap can fruit in as little as two months and will produce in the same bed for several years.
- Most for the money on paperNorth Spore lion's mane outdoor log kit, 100 plugsKit contains a drill bit, log sealing wax, a wax applicator, 100 ct plug spawn and an instruction guide.
- Most complete listing2funguys grey dove oyster plug spawn, 100 countListing states you receive 100+ mycelium infused plugs and a detailed instruction pamphlet.
The picks in detail
Pick 1 · North Spore
North Spore organic wine cap sawdust spawn
See price on AmazonOrganic sawdust spawn of wine cap, also called the garden giant, sold for outdoor beds only. The listing says it can fruit in as little as two months and keeps producing in the same bed for several years.
What the listing offers
- Listing states wine cap can fruit in as little as two months and will produce in the same bed for several years.
- Seller says fresh woody material such as hardwood chips can be added each year to maintain the bed.
- Listed as organic sawdust spawn made for wine cap beds, with storage steps for the filter patch bag in the listing.
Limits to know
- The listing text does not state the bag weight or the bed area it covers, so check the product page before planning a bed.
- Outdoor beds only: the seller says wine cap does not grow on logs and the spawn is recommended only for outdoor use.
Pick 2 · North Spore
North Spore lion's mane outdoor log kit, 100 plugs
See price on AmazonAn outdoor log kit for lion's mane (lions mane): 100 plugs of plug spawn with a drill bit, log sealing wax, a wax applicator and an instruction guide. You supply the fresh hardwood logs.
What the listing offers
- Kit contains a drill bit, log sealing wax, a wax applicator, 100 ct plug spawn and an instruction guide.
- Listing names the wood to use, including beech, hard maple, birch, oak and sweetgum.
- Seller states the plug spawn can be refrigerated for up to 6 months if it is not used right away.
Limits to know
- Slow: the listing says a log takes approximately 12 months to colonize fully before it fruits.
- Logs are not included: you need freshly cut hardwood, and this is a log project, not a mulched garden bed.
Pick 3 · 2funguys
2funguys grey dove oyster plug spawn, 100 count
See price on Amazon100 or more plugs of grey dove oyster plug spawn, sold as a cold weather fruiter for hardwood logs, stumps or bolts. Dowels are 5/16 inch and the listing gives 6 to 15 months to first fruiting.
What the listing offers
- Listing states you receive 100+ mycelium infused plugs and a detailed instruction pamphlet.
- Dowels are 5/16 inch in diameter, the standard hole size drilled for plug spawn.
- First fruiting is stated as 6 to 15 months depending on wood type, and the strain is sold as a cold weather fruiter.
Limits to know
- No drill bit or sealing wax is listed, so those are separate purchases before you can inoculate a log.
- One bullet mentions shiitake mycelium although the product is sold as grey dove oyster, so the listing text is not fully consistent.
Pick 4 · Root Mushroom Farm
Root Mushroom Farm wine cap sawdust spawn
See price on AmazonWine cap sawdust spawn from Root Mushroom Farm, described as second generation spawn. A second brand to compare for a chip or straw bed, with a very short listing.
What the listing offers
- Title states wine cap sawdust spawn, the form that is layered into outdoor beds of hardwood chips or straw.
- The listing describes the product as second generation mushroom spawn.
- The seller describes the spawn as clean and full of mycelium, which is the only other detail given.
Limits to know
- The listing does not state the bag weight, the bed area it covers or the time to first harvest.
- No growing instructions, mulch type or planting season appear in the listing, so the bed has to be planned from a separate guide.
Pick 5 · Liquid Fungi
Liquid Fungi wine cap grain spawn, 1 lb
See price on AmazonA 1 lb bag of wine cap grain spawn that arrives fully colonized. The listing names pasteurized straw inoculation as a use, so it suits a small straw bed rather than a large chip bed.
What the listing offers
- Listing states the 1 lb bag arrives fully colonized and ready to use.
- Pasteurized straw inoculation is named in the title as an intended use.
- Seller states fridge storage of up to 6 months; storage times differ by seller, so follow the label.
Limits to know
- It is grain spawn, not the sawdust spawn usually sold for beds, and grain used outdoors attracts animals.
- The listing gives no bed area, planting season or time to harvest, and 1 lb is a small amount for an outdoor bed.
Read before you buy
- What wood do mushrooms grow on? Tree chart for lion's mane, shiitake and oysterTree-by-species chart for mushroom logs: lion's mane on beech and maple, shiitake on oak, oysters on poplar and willow, plus cherry, walnut and conifers.
- How to grow shiitake mushrooms on logs, from cutting to first harvestShiitake log growing in numbers: 4 to 6 inch oak logs, 30 to 50 holes 1 inch deep, about a year of spawn run, then a 12 to 24 hour soak to fruit.
- How to grow oyster mushrooms outdoors on logs, straw and in bucketsThree ways to grow oyster mushrooms outdoors, compared: logs fruit in 4 to 12 months, straw beds often the same season, buckets in 3 to 5 weeks.
- Growing mushrooms in the garden: how to build a wine cap bedBuild a wine cap bed in the garden: 3 to 5 in of hardwood chips, one 5 lb bag of spawn per 16 to 25 sq ft, 1 in of water a week, mushrooms in 2 to 10 months.
- Grain spawn vs sawdust spawn vs plug spawn: which one for your projectGrain, sawdust and plug spawn compared by best use, tools, speed and storage life (3 to 6 months refrigerated), with a chooser for straw, blocks, logs and beds.
More gear for the logs and outdoor beds stage
Spawn Run chooses every product independently from what its Amazon listing states. We may earn a commission from the links above. As an Amazon Associate I earn from qualifying purchases.