Earthworm Casting Mushroom Substrate

$25.99

Give your mushrooms the nutrients they need for a high-yield, healthy culture! With our premium manure-based mushroom substrate, your bountiful harvest is only a few steps away. Combine each bag with 1 of our Sterile Mushroom Grain Spawn Bags for a 50/50 mix, and you can easily get started on your mycology journey.

Fully sealed and sterile substrate (not pasteurized)
Perfectly hydrated and ready to use in a mono-tub
Clear usage instructions for beginner mushroom growers
Packed with nitrogen, phosphorus, potassium, and plenty of other nutrients that facilitate mycelial growth
Sold in 5-pound bags

Why Use Our Mushroom Substrate?

When it comes to mushroom growing, the type of substrate you use can make or break your mushroom culture.

Get started right away

All 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!

Minimal contamination risk

Each 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 mushrooms

Manure 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.

Intentional design

We make things that work better and last longer. Our products solve real problems with clean design.

Quality first

We obsess over the details and strive to deliver the best products at the best prices, every time.

Customer care

We're always on your side: keeping our loyal customers happy is our top priority and number one goal.

Feature 1

Made with care and unconditionally loved by our customers, this signature bestseller exceeds all expectations.

Feature 2

Made with care and unconditionally loved by our customers, this signature bestseller exceeds all expectations.

At the heart of every product lies a unique story, driven by our passion for quality and innovation. Each item enhances your everyday life and sparks joy.