Key Takeaways
- North Spore is a good supplier. Growers look elsewhere for four reasons: price, stock-outs, no mid-volume discount, and genetics it doesn’t carry.
- For cheaper liquid culture, Out-Grow ($12), Booming Acres ($12) and Midwest Grow Kits ($12.50) all undercut North Spore’s $19.99.
- For volume spawn and log growing, Field & Forest Products drops sawdust spawn from $28 to $18 a bag at 16+ bags.
- For liquid culture with lab results you can read before you order, that’s us. We match North Spore’s $19.99 on three species.
- If you grow outdoors, want USDA organic spawn, or live in Canada, stay with North Spore.
North Spore is hard to beat.
Founded in 2014 in Portland, Maine. USDA organic spawn. Same-day fulfillment on most orders. The broadest catalog of mushroom growing supplies in home cultivation.
So this isn’t a takedown. If you’re happy there, stay.
But growers search for North Spore alternatives for four specific reasons: price, stock-outs, no discount at mid-volume, and genetics North Spore doesn’t carry.
The short answer? Out-Grow, Booming Acres and Midwest Grow Kits for cheaper cultures. Field & Forest Products for volume spawn. Mushroom Grow Kit Co. for bigger countertop kits. SporesMD (that’s us) for lab-documented liquid culture.
Most lists of sites like North Spore give you names and nothing else. Below, we compare six mushroom suppliers on real prices, shipping thresholds and honest weak spots.
Why Growers Look Beyond North Spore
None of these are quality complaints. They’re gaps, and each one is checkable. The figures come from MushroomGrowLab’s North Spore profile and North Spore’s own site.
1. Premium pricing. Liquid culture is $19.99 a syringe, live grain spawn is $29.99 a bag, and plate cultures are $74.99. The premium buys USDA organic certification on all spawn, but other suppliers sell liquid culture from $12.
2. No price break between two and seven bags. Discounts only arrive through 8-pack bundles. Buy five bags and you pay the single-bag price five times.
3. Popular species sell out. Restock alerts exist on each product page, but timing isn’t guaranteed. That hurts when you’ve planned a grow around one species.
4. No microscopy specimens. North Spore doesn’t sell spore specimens for microscopy. If your interest is spore morphology and taxonomy under a scope, that’s a different catalog.
If none of those is a dealbreaker, close this tab and keep ordering from North Spore. If one is, here are six options.
North Spore Competitors at a Glance
Here’s how the main North Spore competitors stack up on what growers ask about first: what each one is best for, what liquid culture costs, and where free shipping kicks in.
| Vendor | Best for | Liquid culture price | Free shipping over | Standout |
| North Spore | One-cart breadth, outdoor growing, Canada | $19.99 (22 species) | $150 | USDA organic spawn, same-day fulfillment |
| SporesMD | Lab-documented liquid culture; microscopy specimens | $19.99 to $24.99 (6 species) | | Public lab results, 20% subscription discount |
| Field & Forest Products | Log and outdoor growers; volume spawn | $15 to $25 | $200 | Sawdust spawn falls from $28 to $18 at 16+ bags |
| Out-Grow | Widest culture library at a low price | $12 (200+ species) | $150 | Plate cultures at $24.95 |
| Midwest Grow Kits | Indoor bags, monotubs, lab gear | $12.50 (most species) | $99 (continental US) | All-in-one bags from $22.99 |
| Mushroom Grow Kit Co. | Bigger countertop kits | Not sold | $125 | 5 lb kits at $35 |
| Booming Acres | Budget grain and substrate | $12 | $150 | Sterilized grain bags from $9 |
Prices were checked in September 2026 and change often. Verify before you budget around them.
Notice the pattern: nobody beats North Spore on everything. Each alternative wins on one product line. So the real question is which line you’re replacing.
1. North Spore: When to Stay Put
Stay if you grow on logs or in garden beds and want spawn, tools and kits in one cart. Nobody else on this list matches that breadth, and we sell no spawn or outdoor supplies at all.
Stay if USDA organic certification on spawn matters to you, or if you need same-day shipping or delivery to Canada. North Spore’s QA policy also promises free replacement of damaged or contaminated products within 30 days.
Their honest weak spot is the one above: price and stock. Everything that follows is a way around one of those two problems.
2. SporesMD
Best for: lab-documented liquid culture, plus genetics North Spore doesn’t carry.
We sell six organic culinary liquid cultures in 10 ml syringes. Lion’s Mane liquid culture (Hericium erinaceus), Golden Oyster (Pleurotus citrinopileatus) and King Oyster (Pleurotus eryngii) are $19.99, the same as North Spore. Blue Oyster liquid culture, Pink Oyster and Antler Reishi are $24.99. Subscribe and save takes 20% off any of them.
The real difference is paperwork. We run an ISO-7 cleanroom and post batch results on a public lab results page. North Spore describes a serious QA program too, including a clean lab built to ISO 7 standards. What we couldn’t find is a page where you can read results before you order.
For a first grow, our mushroom grow bags and all-in-one kits cover gourmet and functional species. Functional Mushroom Kits come in six species at $44.99, and the All-in-One Gourmet Grow Bag for wood lovers is $39.99. Buying for a shop or a farm stand? There’s a wholesale program and white label.
Separately, we carry 39 microscopy liquid cultures, plus prints and swabs. These are sold for microscopy, taxonomy and education only. We don’t ship spore products to California, Georgia, Idaho or Florida. Read up on the legality of mushroom spores for research before you order.
Where we fall short: six culinary species against North Spore’s 22. No spawn, outdoor supplies or equipment. And we cost $5 more on three species, so if price is your only filter, keep reading.
3. Field & Forest Products
Best for: log and outdoor growers, and anyone buying spawn in volume.
Field & Forest has sold spawn from Wisconsin since 1983, and it’s certified organic. It’s the closest match to North Spore’s outdoor range, with one big difference: volume pricing.
Sawdust spawn starts at $28 a bag and drops to $18 at 16 or more bags. No bundle required. That fixes the mid-volume gap from earlier. Liquid culture runs $15 to $25.
Where they fall short: free shipping starts at $200, the highest threshold on this list. Orders ship within five business days rather than same day, and live products can be held during extreme heat or cold. Plan ahead.
4. Out-Grow
Best for: the widest culture library at the lowest price.
Out-Grow lists 200+ species, with liquid culture at a flat $12 and plate cultures at $24.95. Compare that with $19.99 and $74.99 at North Spore. The plate gap alone is $50.
It’s a family-run shop in Illinois, operating since 2009. If North Spore’s 22 species don’t include what you want to grow, look here first.
Where they fall short: cultures are made to order, so add one to three days before anything ships. US delivery only. And the plug spawn range is narrow, so log growers should look at Field & Forest instead.
5. Midwest Grow Kits
Best for: indoor growers who want bags, automated monotubs and lab gear from one shop.
Founded in 2011 in Illinois, Midwest Grow Kits is built around indoor growing. Liquid culture is $12.50 for most species, all-in-one bags run $22.99 to $28.99, and 5 lb kits cost $19.99 to $34.99. Free shipping starts at $99, the lowest bar on this list.
Not sure whether a tub or a bag suits your space? Our grow tub vs grow bag guide covers the trade-offs.
Where they fall short: perishables carry a seven-day return window, so inspect orders the day they land. Free shipping covers the continental US only.
6. Mushroom Grow Kit Co.
Best for: countertop kit buyers who want a bigger block.
The math is simple. Mushroom Grow Kit Co. sells 5 lb kits at $35. North Spore’s Spray & Grow kits are 4 lb at $29.99. That’s $7 a pound against roughly $7.50.
The company also advertises its kits as “100% guaranteed to grow.”
Where they fall short: four species only: lion’s mane plus blue, pink and gold oyster. No cultures, spawn or substrates, so it replaces one North Spore product line and nothing more. The yield figures on its site are the vendor’s own claims, so treat them as marketing until your own block proves them.
7. Booming Acres
Best for: budget grain and substrate at any quantity.
This is where the per-bag math gets interesting. Sterilized grain bags start at $9. Live grain spawn is $15 to $20, against $29.99 at North Spore. CVG substrate runs $11.50 to $19, and liquid culture is $12.
The best part? No bundles or bulk tiers needed. The low price applies to bag one. Free shipping starts at $150.
Where they fall short: it’s a smaller brand with less track record to check. Start with a small order, see how it performs, then scale.
Other Sites Like North Spore Worth a Look
Four more names, one line each:
- Redwood Mushroom Supply: several monotub tiers and a 30-day kit replacement policy.
- Back to the Roots: small retail kits you’ll often find on store shelves.
- Forest Origins: California oyster kits at $29.99.
- Fungi Ally: plug spawn from $16.50 per 100.
One name shows up on most lists of sites like North Spore: Fungi Perfecti. It stopped selling grow kits and sawdust spawn in fall 2019, per Fungi Perfecti’s notice on discontinued kits. It’s no longer a like-for-like alternative.
Want the full field? The Cornell Small Farms supplier directory and the North American Mycological Association cultivation links list dozens of US suppliers.
Liquid Culture, Spawn, or Kit: Which One Are You Replacing?
Here’s what most comparison pages skip: the right North Spore alternative depends on which stage you buy.
Penn State Extension’s six steps to mushroom farming runs from culture to spawn to substrate to harvest. Home growers can enter at three points:
- A ready-to-fruit kit. The block arrives colonized, so there’s no sterile work. You cut, mist and harvest. Highest cost per grow, lowest effort. Look at Mushroom Grow Kit Co., Midwest Grow Kits or our Functional Mushroom Kits.
- Grain spawn. This skips the culture step. You mix live spawn into prepared substrate or plug it into logs. Look at Field & Forest for volume and Booming Acres for budget.
- Liquid culture. It costs the least per grow, because one 10 ml syringe can inoculate several bags. The catch? You need sterile grain and clean technique. Look at Out-Grow for range, or us for published lab results.
New to the terms? Start with what liquid culture is and mushroom spores vs spawn.
Switching is easy, by the way. There’s no lock-in with a supplier. Order one item, run it beside your usual source, and compare. All of this applies to gourmet and functional species like oyster, lion’s mane, reishi and shiitake.
How to Vet Any Mushroom Supplier
Five checks work on any vendor, including us:
- Test results you can see before ordering. “Lab tested” is a claim. A public lab results page is proof.
- A written replacement policy. Look for the window in days and what counts as a valid claim.
- How live cultures ship in heat and cold. Ask about holds, ice packs and weekend transit.
- Organic claims you can confirm. Search the vendor in the USDA Organic Integrity Database.
- Lead time from order to dispatch. Same day, five business days and made to order are very different promises.
Any supplier that passes all five is worth a test order.
FAQ
Is North Spore a good company? Yes. Founded in 2014 in Portland, Maine, with USDA organic spawn, same-day fulfillment on most orders and the broadest catalog in home mushroom growing. People compare alternatives over price and stock, not quality.
What is the closest North Spore alternative? It depends on the product line. Field & Forest Products is closest for outdoor and log growing. Midwest Grow Kits is closest for indoor bags and monotubs. For liquid culture, Out-Grow wins on range and SporesMD on published lab results.
Are there other sites like North Spore for liquid culture? Yes. Out-Grow and Booming Acres sell it at $12, Midwest Grow Kits at $12.50, and SporesMD at $19.99 to $24.99 with a 20% subscription discount.
Who are North Spore’s biggest competitors? For full-range supply, Field & Forest Products and Midwest Grow Kits. Automated competitor lists often name unrelated companies, so check that a “competitor” sells mushroom supplies at all.
Does North Spore sell spores for microscopy? No. North Spore focuses on cultures, spawn and supplies for gourmet species. SporesMD carries microscopy specimens, sold for microscopy, taxonomy and education only. We don’t ship spore products to California, Georgia, Idaho or Florida. For that category, see our Premium Spores alternatives, Sporeworks alternatives and Inoculate the World alternatives comparisons.
Is liquid culture cheaper than grain spawn? Per grow, yes. A $12 to $25 syringe can inoculate several grain bags, while live grain spawn costs $15 to $30 a bag. The trade-off is sterile work and a longer wait.
Should I use more than one supplier? At first, yes. Order the same species from two sources and run them side by side. You’ll learn more from that than from any review page.
North Spore Alternatives: Where to Start
If price or paperwork brought you here, start small. A single culinary liquid culture from us is $19.99, the same as North Spore, and you can read the lab results first. That’s a low-risk test.
Never grown before? Skip the sterile work. Our Lion’s Mane grow kit is $44.99, and our guide on how to grow lion’s mane at home walks through every step.
And if you want plug spawn for logs? Go to Field & Forest, or stay with North Spore. We’d rather point you somewhere useful than waste your time.
Questions about species, storage or which format fits your grow? Contact us. A real person answers.
