Mushroom Spawn Store
Earthworm Casting Substrate for Mushrooms
Earthworm Casting Substrate for Mushrooms
Earthworm Casting Substrate for Mushrooms delivers a premium manure-based substrate designed for a high-yield, healthy culture. Each 5-pound bag is fully sealed and sterile (not pasteurized) and perfectly hydrated, ready to use in a mono-tub. Combine each bag with 1 Sterile Mushroom Grain Spawn Bags for a 50/50 mix to get started on your mycology journey.
The mix uses organic materials blended with coco coir for aeration, gypsum, and water to create an effective substrate. It is packed with nitrogen, phosphorus, potassium, and other nutrients to support mycelial growth. The bag is sterilized and sealed to minimize contamination risk and includes a self-healing injection port to improve safe inoculation. It supports growing a wide variety of dung-loving mushrooms, including button and portabello varieties and some medicinal mushrooms; always check local regulations to see what you can grow.
📋 Product summary:
- 5-pound bags of manure-based substrate that are fully sealed and sterile (not pasteurized)
- Ready-to-use, perfectly hydrated substrate designed for mono-tubs
- Organic materials combined with coco coir, gypsum, and water for aeration and a simple mix
- Contains nitrogen, phosphorus, potassium, and other nutrients to support mycelial growth
- Self-healing injection port on each bag to improve safe inoculation rates
- Supports growing a wide variety of dung-loving mushrooms, including button and portabello, plus medicinal varieties
- Can be combined with Sterile Mushroom Grain Spawn Bags for a 50/50 mix to start quickly
- Minimal contamination risk due to sterilization and sealing
- Sold in 5-pound bags
Get started right awayAll nutrients your mushrooms need, ready-packed in a 5-pound bag. We use organic materials mixed in with coco coir for aeration, gypsum, and water, for a simple yet effective mix bound to keep your mushrooms growing plenty! |
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Minimal contamination riskEach mushroom manure substrate bag is fully sterilized and sealed inside a durable bag. Each bag is also equipped with a self-healing injection port that improves safe inoculation rates. |
Grow a wide variety of mushroomsManure mushroom substrates nutrient-rich composition works great for lots of common dung-loving mushroom species like the button mushroom or portabello and your favorite medicinal variety too;) Always check your local regulations to learn about what you can and can’t grow. |
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🇺🇸 Free shipping nationwide
🇺🇸 Free shipping nationwide
Some free shipping products may be limited to the lower 48 states. All of the shipping estimator tools and the checkout cart will notify you of such a result.
📦 Shipping policy & returns
📦 Shipping policy & returns
NATIONWIDE SHIPPING:
Some free shipping products may be limited to the lower 48 states, as indicated by our shipping estimator tools and checkout cart. Outdoor living, home, and garden items ship nationwide. Standard shipping fees are confirmed at checkout based on your address and provider selection. Free shipping items incur zero fees at checkout. Tracking details are emailed instantly upon order fulfillment.
NATIONWIDE SHIPPING RETURNS: 30 day returns.
We accept returns of unused products that are defective or not defective. Your return must be processed within 30 days of the date of purchase. We do not process exchanges. We will provide a shipping label by email, you are responsible for bringing the return to the shipping provider.
FREIGHT PRODUCT RETURNS: no returns or exchanges.
There are no returns, exchanges or refunds for products delivered via freight. REFUNDS: The cost of the return shipping and a 6% credit card processing/restocking fee will be deducted from your refund amount. The refund balance will be distributed to you once the returned product is received and processed.
NATIONWIDE PRODUCT REFUNDS:
The cost of the return shipping and a 6% credit card processing/restocking fee will be deducted from your refund amount. The refund balance will be distributed to you once the order is canceled and the returned product is received and processed.
Let customers speak for us
Really nice soil and awesome service
Never used because I ordered the wrong Water Filter. Mike was very helpful with the return and refund. Excellent Customer Service.
Great service. Soil is what I wanted and it off loaded exactly where I asked.
Plants are doing really well with this soil. Deep and rich looking soil, plants seem really happy. Much more cost effective (and no plastic bag waste) compared to buying bags of soil mix from a store.
The quality of the craftsmanship is superb! My formula one fan absolutely loves it!!!!
Worked like an absolute charm!
These markers were perfect for ones that we were replacing. The quality is great and they seem sturdy. The gold detail stands out and is visible from a distance. Shipping was very fast.
Good solution. The little flies have disappeared. We were sure to mist/moisten the surface of each plant once a day for 4 or 5 days, after the initial application of the nematodes, to keep the little guys mobile and able to get to any remaining eggs. So, go for it!
Plant was well packed and shipment was very fast. Received a very nice fully rooted plant in the pot!
The organic garden soil is doing very well in my garden bed. The company was professional, nice, and accommodating to my needs. They provide many types of things for your landscaping at a reasonable price.
Product was delivered promptly and the quality of the product was very good, as hoped for. I was thrilled to receive the product so quickly! Thank you!
Product is great. Didn't care for having to pay am extra $17 tariff to UPS to get it delivered, but I guess that's not your doing. Thank you Mr. President.
