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Organic Discount Mushroom Grain Spawn

Certifications | USDA certified organic |
Bag size | 6 lbs |
All spawn listed in this collection is discounted because it is overstocked or slightly older, but still healthy and viable!
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Lentinula edodes. Our favorite commercial strain for indoor shiitake block production. This strain fruits best at colder temperatures and tends to produce mushrooms with large caps and smaller stems. Yield averages are .75-1.5 lb first flush off of 5 lb supplemented sawdust blocks.
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Lentinula edodes. A variation on commercial indoor shiitake genetics. We've had similar results from this strain as from our '207' strain listed above. (We like having multiple varieties of the same species to ensure genetic diversity and reduce the odds of crop failure!)
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Hypsizygus tessellatus. Our favorite brown beech mushroom strain. Great for commercial production. A slow-growing, cool-weather mushroom (55-65 degrees) that produce delicate, nutty clusters.
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Pleurotus eryngii. An alternative king trumpet strain with larger fruiting bodies than our PE1. Fruits best in cold temps.
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Grifola frondosa. A reliable commercial strain from the West Coast for indoor cultivation on sawdust blocks. Hen of the Woods or "maitake" is slow and difficult to grow but prized both for its distinct taste and medicinal properties.
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Pleurotus eryngii. This mushroom is a favorite of chefs and mushroom cultivators alike. The strain originates from Japan and is a cross between oyster and king trumpet. It produces brown marbled caps and soft stems and is a reliable commercial strain that is more tolerant of warmer temperatures.
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Hericium corralloides. From a commercially productive lion's mane strain of comb tooth from Mossy Creek in Tennessee. Unlike the dense "pom poms" of H. erinaceus, this strain produces large, coral-like fruiting bodies with branching spines.
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Pleurotus ostreatus. This is a very productive commercial strain of blue oyster from Pennsylvania. It produces dense clusters with dark gray/blue caps. It produces best in cooler temperatures but also performs well during the warmer months. Averages 1-2 lbs first flush off of 5 lb supplemented sawdust blocks but will also produce off sterilized straw substrate.
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Pholiota nameko. A reliable indoor producer that is covered in a layer of natural gelatin when grown with proper humidity. Flushes are large and caps have a spotted appearance when ready to harvest. This species requires cooler temperatures to fruit, and is a good commercial strain if given adequate humidity and proper gas exchange.
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Hericium erinaceus. A very productive commercial lion's mane strain that forms dense "pom pom" fruiting bodies. Fruits best in cooler temperatures, 1/2-1 lb yield on first flush off of 5 lb supplemented sawdust with consistent subsequent flushes over several months.
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Pleurotus citrinopileatus. A vigorous commercial golden oyster strain and customer favorite. Known for having denser fruit bodies that are less brittle than other citrinopileatus strains.
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Pleurotus ostreatus. Produces highly branched clusters of off-white/tan mushrooms that yield well in both cold and warm temperatures.
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Pleurotus djamor. This pink oyster species produces large flowery clusters of bright pink caps. This strain is very fast growing and tolerant of non-sterile cultivation techniques. Fruits best at warmer temperatures and is not recommended for cold season production.
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Ganoderma lucidum. Our favorite indoor reishi strain. Produces dense and colorful antlers when grown indoors in bags. Best grown using filter patch bags with minimal air exchange.
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Pleurotus citrinopileatus. This commercial strain of golden oyster produces relatively dense clusters of bright yellow caps and fruits best at warmer temperatures. Its showy mushrooms are great for farmers' markets and local accounts but are generally too brittle for long distance transport.
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Pleurotus ostreatus. An alternative blue oyster strain. Darker and denser than our PO1 with a more impressive first flush but a lower tolerance for warm temperatures. A serious Oyster with a serious name.
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Pleurotus ostreatus. A vigorous, high-yield commercial strain that produces very dense clusters of fleshy, firm, pure white caps. They have a sweeter flavor and aroma than other oysters and hold their shape and texture when cooked. This strain performs very well during the coldest months of the year but is not recommended for outdoor warm weather production.
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Pholiota adiposa. A reliable, visually striking commercial strain from the West Coast. This species produces dense clusters of scruffy, tan-colored mushrooms that are highly prized by chefs. First flushes average 1-2 lbs off of 5 lb supplemented sawdust blocks.
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Pleurotus eryngii. A beloved commercial king trumpet mushroom strain originating from Japan that produces mushrooms with large stems and small tan caps. This strain is more tolerant of warm temperatures but still fruits best in cooler weather.
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Hericium erinaceus. A "showy" strain of Lion's Mane that produces commercially viable flushes of less uniformed fruiting bodies adding variation to your lion's mane boxes.
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Pleurotus pulmonarius. A dense Italian oyster species that produces wavy, brown-capped mushrooms with a relatively low moisture content. They are a great farmers' market oyster and add nice variety to mixed mushroom boxes.
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Agrocybe aegerita. A reliable commercial pioppino strain that produces flushes of velvety-capped mushrooms with snappy stalks. These mushrooms are relatively sturdy and are not too brittle for distance shipping or delivery.
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No worries
The web site is one of the best sites I’ve ever used to learn a new process. The fact that all the things you need can be purchased as soon as you learn how is so helpful. I really like the grain spawn bags for starting mycelium. I used a different method in the past but it was more problematic. I also love that I can support research and development in the field.
Don’t discount this spawn!
Sure, this spawn is discounted, but don’t make the mistake of discounting this spawn! I have purchased a total of 17 bags of various strains of discounted spawn from North Spore now - as you can tell, I am very happy with my purchases - I will continue to buy them when I see them offered. It allows me the opportunity to be generous and experimental, without breaking the bank. Thanks, North Spore!

Great grain spawn!
Bought a bag of discount spawn. I didn’t have any issues with shipping at all. Great service! Overall I definitely recommend this grain spawn. Thank you !

What a deal
Bought a couple bags of discount spawn. Both arrived quickly and looked very healthy. I love seeing what strains will be available in the discount bin. Always quality products. Thank you!

A rare case of being disappointed.
I usually purchase the discount grain spawn bags as a way to introduce a little variety at a good price point. Unfortunately, the 'basic beech' variety I recently got has been a disappointment. I understand that these sale bags are usually a little older and/or overstocked, but my most recent purchase just isn't flourishing. Mycelium growth has just fizzled. You win some, you lose some, I guess. Nevertheless, I still love the North Spore!