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Hands holding a vibrant assortment of fresh mushrooms, including pink oyster, lion's mane, and other varieties, set against a natural outdoor background. The image symbolizes the diversity and quality of cultivated mushrooms.

Discover the Wonderful World of Mushrooms with Out Grow

Discover the Wonderful Worlds of Mushrooms with OutGrow. Grow your own food at home with gourmet mushroom cultures, premium mushroom substrates and mushroom supplies.

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A large, clear plastic bag filled with sterilized grain substrate, placed on a marble table with more grain spread around the base. The image highlights the ready-to-use mushroom substrate designed for inoculation.

Sterilized and Pasteurized Mushroom Substrates

Premium mushrooms substrates ready to use. We do the work, so you don’t have to.

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A syringe filled with liquid culture next to a petri dish containing a growing mushroom mycelium, placed on a sterile, light blue surface. The image highlights mushroom culture cultivation for laboratory and commercial use.

Choose from hundreds of mushroom different cultures, mushroom spawn and more!

Out Grow offers hundreds of different mushroom cultures for you to choose from.

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Discover OutGrow®: Your Source for Mushroom Cultivation Supplies

Welcome to OutGrow® LLC, where we pride ourselves on being the foremost authority in providing high-quality mushroom substrates, growing media, and comprehensive mushroom cultivation supplies. Established in 2009, OutGrow® has evolved into the go-to destination for enthusiasts and professionals alike, seeking not just products but solutions that empower and enhance the mushroom cultivation journey.

Featured Products

Sale

Myco Mix: Cow Manure Mushroom Substrate

1 review

$21.60 ~~$27.00~~

Out-Grow 50/50 Horse Manure and Wheat Straw Substrate - 5 lb Bag Display

Sale

50/50 Horse Manure and Straw Mushroom Substrate (5lb Bag)

16 reviews

$21.60 ~~$27.00~~

5lb Manure-Based Mushroom Substrate Bag on Substrate Pile

Sale

Manure Based Mushroom Substrate - 5lb Bag

27 reviews

$21.60 ~~$27.00~~

Pasteurized Manure-Based Mushroom Substrate Bag - 1lb Mushroom Grow Bag With Filter Patch

Sale

Manure Based Mushroom Substrate - 1lb Bag

1 review

$6.00 ~~$7.50~~

1lb Pasteurized Mushroom Casing Mix - Ready-to-Use in Grow Bag

Sale

Pasteurized Mushroom Casing Mix

5 reviews

$5.60 ~~$7.00~~

5lb Bag of Sterilized Hardwood Mushroom Substrate on Substrate Pile

Sale

Wood-Based Mushroom Substrate Bag

2 reviews

$21.60 ~~$27.00~~

Bag of Pasteurized Straw Mushroom Substrate

Sale

Pasteurized Wheat Straw (5lbs)

1 review

$16.00 ~~$20.00~~

Directions for Inoculating Spawn Bags

A mushroom grow bag with clusters of oyster mushrooms growing out of it, set on a kitchen countertop. The image showcases a home mushroom cultivation setup, often used for research or experimentation in mushroom growth.

Learn About Mushrooms

A person wearing gloves fills a glass jar with mushroom substrate using a scoop, with additional substrate in a plastic container nearby. The image illustrates the process of storing mushroom substrates in airtight containers to maintain freshness and prevent contamination.

How to Store Mushroom Substrates

A team member holding up a large mushroom, obscuring their face, with an outdoor forest setting in the background. The image represents the passion for mushrooms shared by the Out-Grow team.

Meet the OutGrow Team

New Products

5 Pounds Pasteurized Manure Mushroom Substrate (5 x 1lb Bags)

New in

5 Pounds Pasteurized Manure Mushroom Substrate (5 x 1lb Bags)

$39.00

Five sealed rectangular blocks of 50/50 horse manure and straw mushroom substrate, each weighing five pounds. The blocks are tightly packed in clear plastic, showing a dark mixture of organic material with visible straw strands throughout.

50/50 Horse Manure and Straw Bulk Substrate (25 lbs)

$130.50

All In One Mushroom Grow Bags 8-Pack

$140.00

Twelve half-pint jars filled with a sterilized mix of brown rice flour and vermiculite substrate, arranged in a grid. The jars feature self-healing injection ports on the lids, ideal for easy inoculation and efficient mushroom cultivation.

BRF Bulk Substrate Jars (12-Pack)

$63.00

Five sealed rectangular blocks of manure-based mushroom substrate, each weighing five pounds. The blocks are tightly wrapped in clear plastic, showing a dark, finely textured organic material. Ideal for bulk mushroom cultivation.

Manure Based Bulk Substrate (25 lbs)

$130.50

Twelve quart-sized jars filled with a sterilized mix of grains, including rye, milo, and popcorn. The jars are arranged in a grid and feature self-healing injection ports on the lids, designed for easy inoculation and optimal mushroom cultivation.

Mega Mix Bulk Substrate Jars (12-Pack)

$116.25

Five sealed mushroom grow bags filled with fully hydrated and sterilized popcorn grains, each weighing five pounds. The bags are tightly wrapped in clear plastic and feature self-healing injection ports, perfect for inoculation and bulk mushroom cultivation.

Popcorn Bulk Substrate Grain Bags (25 lbs)

$130.50

Twelve quart-sized jars filled with fully hydrated and sterilized popcorn grains, arranged in a grid. The jars feature self-healing injection ports on the lids, making them ideal for easy inoculation and efficient mushroom cultivation.

Popcorn Bulk Substrate Jars (12-Pack)

$116.25

Twelve quart-sized jars filled with fully hydrated and sterilized red milo grains, arranged in a grid. The jars feature self-healing injection ports on the lids, making them ideal for easy inoculation and efficient mushroom cultivation.

Red Milo Bulk Substrate Jars (12-Pack)

$116.25

Five sealed mushroom grow bags filled with fully hydrated and sterilized rye berries, each weighing five pounds. The bags are tightly wrapped in clear plastic and feature a self-healing injection port, ideal for inoculation and bulk mushroom cultivation.

Rye Berry Bulk Substrate Grain Bags (25 lbs)

$130.50

Twenty-five sealed mushroom grow bags, each filled with one pound of fully hydrated and sterilized rye berries. The bags are neatly arranged in a grid, wrapped in clear plastic with visible filter patches, perfect for large-scale mushroom cultivation.

Rye Berry Bulk Substrate Grain Bags (25-Pack)

$147.50

Twelve quart-sized jars filled with fully hydrated and sterilized rye berries, arranged in a grid. The jars feature self-healing injection ports on the lids, making them ideal for mushroom cultivation and inoculation in bulk.

Rye Berry Bulk Substrate Jars (12-Pack)

$116.25

Twelve quart-sized jars filled with fully hydrated and sterilized white millet grains, arranged in a grid. The jars feature self-healing injection ports on the lids, making them ideal for easy inoculation and efficient mushroom cultivation.

White Millet Bulk Substrate Jars (12-Pack)

$116.25

Twelve quart-sized jars filled with fully hydrated and sterilized white milo grains, arranged in a grid. The jars feature self-healing injection ports on the lids, making them ideal for easy inoculation and efficient mushroom cultivation.

White Milo Bulk Substrate Jars (12-Pack)

$116.25

Five sealed mushroom grow bags filled with wood-based mushroom substrate, each weighing five pounds. The bags are tightly wrapped in clear plastic, displaying the finely textured wood fibers used for growing wood-loving mushrooms. Ideal for bulk cultivation.

Wood Based Bulk Substrate (25 lbs)

$130.50

Best Selling

Medium Mushroom Grow Bag with 0.2 Micron Filter (3T)

1 review

$0.55

Large Mushroom Grow Bags with 0.2 Micron Filter (XLST)

7 reviews

$0.70

All-in-One Mushroom Grow Bag on white background

Sale

Manure Based All in One Mushroom Grow Bag

8 reviews

$14.36 ~~$17.95~~

Sale

Pasteurized Mushroom Casing Mix

5 reviews

$5.60 ~~$7.00~~

Sale

Mini All in One Mushroom Grow Bag

23 reviews

$9.60 ~~$12.00~~

Sale

Inoculate and Wait® Manure Based Mushroom Substrate

8 reviews

$14.36 ~~$17.95~~

Sale

Wood-Based All-In-One Mushroom Grow Bag

2 reviews

$14.36 ~~$17.95~~

Mini Wood-Based All-In-One Mushroom Grow Bag

Sale

Mini Wood-Based All-In-One Mushroom Grow Bag

1 review

$9.60 ~~$12.00~~

Become a VIP from Day One:

Unlock Exclusive Rewards with Out Grow

Start with a Bonus: Join our Loyalty Rewards Program now and kick off with 500 points on us. It's our way of welcoming you to the family.

More Points, More Joy: Earn 15 points for every dollar you spend. The more you engage, the more you earn— from shopping to reviews and referrals.

Level Up Your Experience: Climb through our tiers to unlock even greater rewards. Each level brings you closer to exclusive perks and additional points.

A Thank You for Growing with Us: Our Loyalty Program is our handshake to you, celebrating our journey together. Sign up today and transform your purchases into rewards.

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Liquid Cultures

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Sale

Gourmet Mushroom Cultures 5 Pack

$34.36 ~~$42.95~~

Sale

Medicinal Mushroom Cultures 5 Pack

$47.96 ~~$59.95~~

Sale

Oyster Mushroom Cultures 5 Pack

$47.96 ~~$59.95~~

Sale

Abalone Mushroom (Pleurotus cystidiosus)

$9.60 ~~$12.00~~

Sale

ABM Mushroom (Agaricus Blazei-murrill)

$9.60 ~~$12.00~~

Sale

Agarikon (Fomitopsis officinalis)

1 review

$9.60 ~~$12.00~~

Sale

Almond Agaricus (Agaricus subrufescens)

$9.60 ~~$12.00~~

Amber Jelly Mushroom (Exidia crenata)

$12.00

Sale

Aniseed Toadstool (Clitocybe odora)

$9.60 ~~$12.00~~

Oyster Mushroom, Apple (Pleurotus ostreatus)

Sale

Apple Oyster Mushroom (Pleurotus ostreatus)

$9.60 ~~$12.00~~

Sale

Apricot Jelly Mushroom (Guepinia helvelloides)

$9.60 ~~$12.00~~

Sale

Armillaria nabsnona

$9.60 ~~$12.00~~

Sale

Artists Conk (Ganoderma applanatum)

$9.60 ~~$12.00~~

Sale

Aspen Oyster (Pleurotus populinus)

$9.60 ~~$12.00~~

Sold Out

Australian Shiitake (Lentinula leteritia)

$9.60 ~~$12.00~~

THE SUSTAINABILITY OF MUSHROOMS: HEALTHY FOR PEOPLE AND THE PLANET

Mushrooms are incredible organisms; they grow efficiently and can be used for so many different things, from nourishment to a substitution for plastic.