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Sterile Grain and Mushroom Substrates

Sterile Grain and Mushroom Substrates

Regular price $17.95 USD
Regular price $25.00 USD Sale price $17.95 USD
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Sterile Grain And Mushroom Substrate

Watch Michael Inoculating Sterilized Grain Spawn Bags with Injection Ports


 Elevate your mushroom growing journey with our Premium Mushroom Cultivation Bundle, now featuring an incredible deal: buy an all-in-one grow bag or a Sterilized Grain Spawn with Injection Port bag, and get a premium liquid culture at 75% off. This offer allows you to create the perfect growing environment for your desired mushroom species.

What’s Included:

  One all-in-one grow bag or Sterilized Grain Spawn with Injection Port bag

Your choice of one premium liquid culture (75% off)

Comprehensive instructions

 Customize your cultivation experience by selecting the most suitable substrate formula for your chosen strain or species. Whether you’re a beginner or an experienced grower, our detailed instructions will guide you through every step, ensuring a successful harvest. Simply add the items to your cart, and the discount will be applied automatically at checkout.

 Take advantage of this special offer and start your personalized mushroom cultivation adventure today with Southwest Mushrooms.

 Sterilized Grain Spawn with Injection Port

Start your mushroom journey with confidence using our ready-to-inoculate sterilized grain spawn. Perfect for both beginners and seasoned cultivators, this product is designed for hassle-free mushroom growing.

  • Pre-sterilized to prevent contamination and save you time.
  • Features a self-healing injection port for easy use with liquid culture syringes.
  • Equipped with a 2 µm filter bag for clean airflow and optimal gas exchange.
  • Ideal for a variety of mushrooms, including those in our Gourmet and Wood Lover blends.

All-in-One Mushroom Growing Bags

Discover the ultimate convenience in mushroom cultivation with our all-in-one bags. This user-friendly product is a must-have for any mushroom enthusiast looking to streamline their growing process.

  • Combines 2 pounds of grain and 3 pounds of substrate in one bag for a balanced growth medium.
  • Includes an injection port and 2 µm filter to maintain sterility and healthy growth.
  • Just inject your choice of liquid culture and watch your mushrooms thrive.
  • Perfect for growing a wide range of species, from Oyster to Lion's Mane.

Premium Sterile Substrate Blends

Choose from our selection of sterile substrate blends tailored for specific mushroom varieties. Each blend is ready to inoculate, ensuring a smooth and successful grow.

  • Wood Lover Blend: Ideal for Shiitake, Reishi, Maitake, and Turkey Tail.
  • Gourmet Blend: Perfect for cultivating Lion's Mane, Chestnut, Pioppino, and more.
  • House Blend: Specially formulated for Oyster and compost-loving mushrooms.
  • Pre-sterilized for convenience and designed for optimal mushroom nutrition.

Mushroom Cultivation Tool Selection

Equip yourself with the best tools for efficient mushroom growing. Our range of quality cultivation tools is designed to support your mushroom projects from spawn to harvest.

  • Sterile grain and substrates minimize prep work and maximize success.
  • Liquid culture tools ensure precise and clean inoculation.
  • All products are designed to be user-friendly, even for those just starting out with mushroom cultivation.
  • Invest in reliable tools to enhance your mushroom growing experience.

Mushroom Spawn for Enthusiasts

Our grain spawn is the heart of your mushroom growing adventure. With our top-quality spawn, you can cultivate a variety of gourmet and medicinal mushrooms right at home.

  • Perfect for use with our sterile substrate blends or your own custom mix.
  • Ensures strong, healthy mycelial growth for a bountiful harvest.
  • Suitable for a range of mushrooms, including our Wood Lover and Gourmet selections.
  • A fundamental component of any mushroom grow kit.



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Customer Reviews

Based on 11 reviews
Rebecca (Bremerton, US)
So SO super

I am a commercial mushroom cultivator and when I am in a pinch and need supplies, I come here. Always reliable, always premium quality.

Great products

Ordered two grow kits from Southwest and both were healthy and bags were sealed very well with great healthy mycelium. The grow kit had very good instructions that come with them. Very happy😁

Customer (Las Vegas, US)
Bags were sealed to the point of separating. Kind of not worth it due the potential contamination.

Bags were sealed to the point of separating. Kind of not worth it due the potential contamination. Can post photos if necessary

We apologize that you were not satisfied with your order, please reach out to us and we'll be happy to make things right and improve your experience.


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It used to be $35 for 6 pounds of grain spawn. But unfortunately now it’s 3 pounds for $20. Unfortunately down sizing and charging more.