Two sterilized grain spawn bags with self-healing injection ports on a shelf

Grain Spawn Kit - Choose Your Species

2 Bags + 10cc LC / Reishi / Standard
200.00 SR
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Two sterilized grain spawn bags with self-healing injection ports on a shelf
  • Two sterilized grain spawn bags with self-healing injection ports on a shelf
  • Grain spawn bags in our pressure sterilizer right after a sterilization run
  • Row of sterilized grain spawn bags with filter patches and injection ports on a shelf
  • Sterilized grain spawn bag with filter patch and injection port on a shelf
  • Grain spawn bags filled and ready for sterilization on a cart
  • Grain spawn bags loaded in our pressure sterilizer
  • Grow room shelves with grain spawn bags, liquid culture jars and agar plates
  • Two sterilized grain spawn bags with self-healing injection ports on a shelf
  • Grain spawn bags in our pressure sterilizer right after a sterilization run
  • Row of sterilized grain spawn bags with filter patches and injection ports on a shelf
  • Sterilized grain spawn bag with filter patch and injection port on a shelf
  • Grain spawn bags filled and ready for sterilization on a cart
  • Grain spawn bags loaded in our pressure sterilizer
  • Grow room shelves with grain spawn bags, liquid culture jars and agar plates
Grain Spawn Kit - Choose Your Species

Grain Spawn Kit - Choose Your Species

200.00 SR
Bundle Size
Species
Strain

Ships fresh to order

Satisfaction guaranteed

48-hour damage protection

Build your own grain spawn with our Sterile Grain Spawn Kit. It includes pre-sterilized grain bags with a self-healing injection port, paired with a liquid culture syringe of your chosen species. Simply inject, incubate, and watch it colonize. No cutting the bag open, no exposure risk, just a clean, direct injection into sterile substrate.

Why Buy This Kit:

  • Two bags for the price of one. Each kit includes sterile grain bags plus a liquid culture, so you get much more G1 for your money. A standard 2-bag kit costs the same as a single made-to-order G1 bag, and you incubate it in your own space, on your own schedule.
  • Made for testing. A small batch that's perfect for trying a new strain or dialing in your setup. Once your method is working, contact us and we can add your strain to our production lineup and supply it as G2 grain spawn on a weekly or monthly schedule.
  • True G1 grain spawn. You inoculate the grain straight from our liquid culture, so the first generation on grain is yours to expand however you like.
  • Strains you won't find as pre-colonized Grain Spawn, including Chicken of the Woods, Paddy Straw and Oudemansiella raphanipes.
  • Learn by doing. Inject, incubate, and watch mycelium take over the grain with your own hands, no expensive sterile lab setup required.

What's Included:

  • 2 Bags + 10cc LC: 2 sterile grain bags (~1.5 kg each) with self-healing injection port and 0.2-micron filter patch, 1 × 10 mL liquid culture syringe of your chosen species, 2 sterile needles, 2 alcohol wipes
  • 4 Bags + 20cc LC: 4 sterile grain bags, 1 × 20 mL liquid culture syringe of your chosen species, 4 sterile needles, 4 alcohol wipes

Freshly Prepared:

Every grain bag is sterilized fresh to order. Please allow approximately 1 week for grain preparation, sterilization, quality inspection, and packaging before shipment.

How It Works:

  1. Shake the syringe well.
  2. Swab the injection port with alcohol.
  3. Use a fresh sterile needle for each bag.
  4. Inject 2.5–5 mL of liquid culture per bag through the self-healing port.
  5. Gently tilt and turn the bag so the culture spreads through the grain. There's no need to reopen it.
  6. Incubate at 21–24°C (70–75°F), out of direct light. Colonization time varies by species and strain, so expect roughly 2 to 8 weeks.
  7. Don't break and shake until it's at least 60% colonized. Breaking and shaking too early is the most common cause of contamination in DIY grain spawn. Once it's past 60%, you can gently break up the grains and shake the bag to spread the mycelium and speed up full colonization.
  8. Once fully white, it's ready to use. Treat it exactly like our standard Grain Spawn.

New to this? A good starting point is any of our oyster mushroom varieties. They colonize faster than most other species, giving you quicker results while you get comfortable with the process.

Important Information:

This kit is intended for customers familiar with sterile injection technique and liquid-culture handling. Cultivation instructions and personalized guidance are not included. This product provides the sterile substrate and culture only, and colonization and fruiting are the customer's responsibility.

Storage:

Store the sterile grain bag(s) at room temperature in a clean, dry area until ready to inoculate. Keep the liquid culture syringe refrigerated (2–8°C) and protected from direct light. The culture may be stored for up to 6 months under refrigeration, although we recommend using it as soon as practical for the most vigorous growth. Do not freeze.

A note on cold-sensitive species: most liquid cultures store well under standard refrigeration, but Paddy Straw and Pink Oyster cultures are both damaged by standard refrigeration. Keep both at room temperature (18–30°C / 64–86°F), never in the fridge, and use them relatively promptly for the most vigorous growth.

Quality Guarantee:

Every grain bag is sterilized and inspected before shipment. If your sterile grain bag is confirmed contaminated upon arrival, prior to inoculation, contact us promptly with clear photographs within 24 hours for a replacement at no additional charge. Once inoculated, contamination resulting from handling, injection technique, or storage is outside our control.

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