Sterilized Grain Spawn

Grow mushrooms at home with our high-quality sterile grain spawn. We’ve perfected the formula, and our collection includes Sterile Mushroom Grain Spawn Bag (5 Pound) and Bulk Grain Spawn with full and half pallets with five injector ports.

Start growing your favorite mushroom varieties and spores today with our collection, which helps you cultivate at home. Discover them below and receive free US shipping.

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What Our Customers Say

Consistency Everytime - We ensure the grain and substrate are separated to facilitate easy monitoring and faster colonization. This is unlike many large suppliers, who mix the grain and substrate to create a homogeneous mixture.
Sealed Before Sterilizing - Through our proprietary process, we seal the bags before sterilization to ensure no contamination. Shelf-stable food products are made the same way, which guarantees product integrity.
Meticulous Attention To Detail - We hand-fill every bag, carefully packing the ingredients and neatly folding the bag to prevent premature mixing. We place these in a perfect-size box and protective liner bag for further protection.
Highest Quality Ingredients - We source local organic ingredients from trusted USA businesses, prioritizing freshness and quality. These are carefully prepared in-house to ensure consistency, purity, flavor, and nutritional value in every batch.
A Superior Result - We use temperature probes to carefully monitor the core bag temperature during sterilization to achieve and maintain the precise time and temperature targets needed for for consistent quality, safety, and reliability in every batch.
Consistency Everytime - We ensure the grain and substrate are separated to facilitate easy monitoring and faster colonization. This is unlike many large suppliers, who mix the grain and substrate to create a homogeneous mixture.

Premium Sterile Grain Spawn For Sale At Affordable Prices

At Mushroom Spawn Store, we supply a wide range of products designed to give you the best results possible. Our sterilized grain spawn collection features all the essentials that are needed to start your mycology journey, including:

Sterile Mushroom Grain Spawn Bag (5 Pound)
Bulk Grain Spawn - Full or Half Pallet - 5# Injector Port Bags

Customer satisfaction is our top priority; we take pride in having thousands of satisfied customers across the USA. With nearly 20 years of experience in mushroom cultivation, our knowledgeable and friendly team is on hand to guide you through every stage of the mushroom growing process, from setting up to harvesting.

You can feel confident in your mushroom cultivation journey with our products and expert support.

Contact us today!

We’ve created the perfect mushroom-growing product and accessories that are guaranteed to give you superior results every single time. Made from the highest-quality organic and food-grade materials, our collection of sterile grain spawn bags is designed to make your life as easy as possible.

Our products are designed for both beginners and experienced mycologists.

Standout features include:

  • Monotub fruiting chambers and all the necessary accessories
  • Four mini all-in-one mushroom grow bags
  • One bag of grain spawn
  • Mushroom substrate
  • Casing mix 

FAQs

While it is possible to reuse mushroom mycelium, it is not recommended due to the high risk of contamination, especially with repeated use.

The recommended spawn-to-mushroom substrate ratio for mushroom growth is around 1:2 to 1:4.

Wood-loving mushrooms, such as oyster mushrooms, grow on decomposing fibres, such as wood chips and coffee grounds.

Spawn colonization time depends on the type of grain, room temperature, and variety of mushroom species. Typically, it takes between one to three weeks for grain spawn to fully colonize.

Using the wrong sterile grain for mushroom cultivation can lead to a number of issues, specifically reduced yield, slower colonization, and an increased risk of contamination.

Yes, all our products at Mushroom Spawn Store are shipped in plain brown boxes, so you can safely and discreetly begin your mushroom cultivation journey.

Yes, we do! You can check our shipping page for further information.

The time it takes to grow mushrooms from our spawn grain varies, but it takes a few weeks for colonization and another for the mushrooms to fruit.

Our collection of sterile grain spawn is suited for first-time growers, as well as mycology enthusiasts. They are a great way to get started in the fascinating world of mushrooms and reap the physical and mental health benefits in no time.

Yes! For orders over $50, you can choose to pay in 4 installments using ShopPay.