Left Continue shopping
Your Order

You have no items in your cart

You might like
Black Poplar Mushroom Spawn, 1 Quart Jar
Black Poplar Mushroom Spawn, 1 Quart Jar
$24.95
2 Sterilized Rye Bags with Injection Port & 1 Bag of 5lb Manure Substrate
2 Sterilized Rye Bags with Injection Port & 1 Bag of 5lb Manure Substrate
$26.73
Free Shipping Order Over $150

Mushroom Spawn

Mushroom Spawn From Out Grow

Below you can find our mushroom spawn collection, ready to inoculate substrate the day it arrives. Every jar is first generation, started from our own agar cultures in our northwestern Illinois lab and vacuum sealed before it ships. One quart holds roughly two pounds of colonized rye, enough to expand into twelve more quart jars or to run five pounds of bulk substrate.

Oyster Mushroom Spawn

King, Blue, Pink, Pearl, Golden, Phoenix, Brown, and Black Pearl King. Fast colonizers with wide temperature tolerance, and the group to start with if you are new to bulk substrate work.

Gourmet Mushroom Spawn

Shiitake, Maitake, Enoki, Beech, Nameko, Chestnut, Black Poplar, Morel, and Cauliflower. Longer spawn runs than oysters, higher market value at the other end.

Medicinal Mushroom Spawn

Reishi, Antler Reishi, Turkey Tail, Cordyceps, and Lion's Mane. Antler Reishi is Ganoderma multipileum, a separate species from Reishi, and fruits to a different form.

Outdoor Mushroom Spawn

Wine Cap and Chicken of the Woods, for garden beds, wood chip mulch, and stumps. Both establish outdoors and produce across multiple seasons once set.

Storage, expansion ratios, and contamination questions are answered in our mushroom spawn FAQ. If you would rather sterilize and inoculate your own, see our grain spawn bags, and our mushroom substrate is ready to use on arrival.

King Oyster mushroom grain spawn in a one quart jar, smooth even white colonization, microscope in the background
1 in stock
King Oyster Mushroom Spawn, 1 Quart Jar
$24.95
Chestnut mushroom grain spawn in a one quart glass jar, colonized rye grain visible through the glass
3 in stock
Chestnut Mushroom Spawn, 1 Quart Jar
$24.95
Blue Oyster mushroom grain spawn in a one quart jar, densely colonized with thick white mycelium, Out-Grow lab
Blue Oyster Mushroom Spawn, 1 Quart Jar
$24.95
Chicken of the Woods grain spawn in a one quart jar, dense creamy white colonization, Out-Grow lab bench
2 in stock
Chicken of the Woods Mushroom Spawn, 1 Quart Jar
$24.95
Pearl Oyster mushroom grain spawn in a one quart jar, fully colonized with dense bright white mycelium
3 in stock
Pearl Oyster Mushroom Spawn, 1 Quart Jar
$24.95
Lion's Mane mushroom grain spawn in a one quart jar, clumpy white mycelium across the colonized grain
Lion's Mane Mushroom Spawn, 1 Quart Jar
$24.95
Shiitake mushroom grain spawn in a one quart glass jar, white mycelium threaded through the colonized grain
4 in stock
Shiitake Mushroom Spawn, 1 Quart Jar
$24.95
Pink Oyster mushroom grain spawn in a one quart jar, white mycelium covering colonized rye grain
3 in stock
Pink Oyster Mushroom Spawn, 1 Quart Jar
$24.95
Golden Oyster mushroom grain spawn in a one quart glass jar, white mycelium clumping across the rye grain
Sold Out
Golden Oyster Mushroom Spawn, 1 Quart Jar
$24.95
King Oyster mushroom grain spawn in a one quart jar, smooth even white colonization, microscope in the background
Sold Out
Black Pearl King Oyster Mushroom Spawn, 1 Quart Jar
$24.95
Cauliflower mushroom grain spawn in a one quart jar, white mycelium binding rye grain, on a stainless steel lab bench
2 in stock
Cauliflower Mushroom Spawn, 1 Quart Jar
$24.95
Beech mushroom grain spawn in a one quart jar, dense colonized grain on a stainless steel bench
2 in stock
Beech Mushroom Spawn, 1 Quart Jar
$24.95
Nameko mushroom grain spawn in a one quart jar, white mycelium speckled through colonized rye grain
2 in stock
Nameko Mushroom Spawn, 1 Quart Jar
$24.95
Black Poplar mushroom grain spawn fully colonized in a one quart glass jar, white mycelium over rye grain, on a stainless steel lab bench
2 in stock
Black Poplar Mushroom Spawn, 1 Quart Jar
$24.95
Maitake mushroom grain spawn in a one quart glass jar, tan and white colonized grain on a lab bench
3 in stock
Maitake Mushroom Spawn, 1 Quart Jar
$24.95
Cordyceps militaris grain spawn in a one quart jar showing the distinctive golden orange colonized grain
3 in stock
Cordyceps Mushroom Spawn, 1 Quart Jar
$24.95
Wine Cap mushroom grain spawn in a one quart jar, white mycelium running through the rye grain, also sold as King Stropharia
1 in stock
Wine Cap Mushroom Spawn, 1 Quart Jar
$24.95
Turkey Tail mushroom grain spawn in a one quart jar, white mycelium across fully colonized rye grain
1 in stock
Turkey Tail Mushroom Spawn, 1 Quart Jar
$24.95
Morel mushroom grain spawn in a one quart jar showing the distinctive dark rust coloured colonized grain
2 in stock
Morel Mushroom Spawn, 1 Quart Jar
$24.95
Enoki mushroom grain spawn in a one quart glass jar, white mycelium speckled through the rye grain
2 in stock
Enoki Mushroom Spawn, 1 Quart Jar
$24.95
Reishi mushroom grain spawn in a one quart jar, white mycelium over darker rye grain, Out-Grow lab
3 in stock
Reishi Mushroom Spawn, 1 Quart Jar
$24.95
Reishi mushroom grain spawn in a one quart jar, white mycelium over darker rye grain, Out-Grow lab
2 in stock
Antler Reishi Mushroom Spawn, 1 Quart Jar
$24.95
Brown Oyster mushroom grain spawn in a one quart glass jar, white mycelium across colonized rye grain, petri dishes in the background
2 in stock
Brown Oyster Mushroom Spawn, 1 Quart Jar
$24.95
Phoenix Oyster mushroom grain spawn in a one quart glass jar, even white colonization across the grain
2 in stock
Phoenix Oyster Mushroom Spawn, 1 Quart Jar
$24.95