Straw & Oak Pulp Mushroom Substrate Grow Bag (4 lb)
Straw & Oak Pulp Mushroom Substrate Grow Bag (4 lb)
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Warranty & Refund Policy
Warranty & Refund Policy
Substrate Warranty and Refund Policy
Within the first 30 days of placing your order we guarantee that your substrate product is free from defects or we will replace it and ship the replacement product for free. If the product has been already been used we will issue a store credit only for product purchase price minus a 20% processing fee. Shipping fees and sales tax are non-refundable.
To file a claim please take at least 3 close up photos of the injection port and each bag or jar showing us the issue so we can review your claim. We offer replacement products only on defective or damaged products. No need to return products.
Straw Substrate Tips
Straw Substrate Tips
Colonization times can vary widely depending on the species. However straw is the fastest colonizing substrate available so it should colonize pretty fast, much faster than wood based substrate. If you’re a beginner and prefer a faster, more rewarding first grow, consider starting with Pink Oyster Mushrooms. Depending on the species and the viability of your liquid culture, full colonization can take up to 1 1/2 months.
User Guide
User Guide
Download our wood/straw grow bag guide here.
Rewards Program
Rewards Program
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SKU: SKU:STR-WD-GB-4
New Item
Shroomability’s 4 lb Straw & Oak Pulp Mushroom Substrate Grow Bag is a premium, ready-to-use grow bag designed for wood-loving and straw-loving gourmet mushrooms. Each pasteurized bag includes a self-healing injection port and a .2 micron gas-exchange filter, ensuring clean, safe, and reliable colonization. Unlike traditional straw substrates, our substrate features superfine milled straw pulp, eliminating sharp stems that can puncture bags while providing more even colonization and bigger grows since they contain more water than traditional straw substrate.. Perfect for all Oyster mushrooms and Lion’s Mane. Ideal for growers who want consistent results, long shelf life, and a high-quality substrate made with professional precision.
• 4 LB PREMIUM SUBSTRATE BAG – Each grow bag is filled with a professionally blended mix of hardwood sawdust and superfine straw pulp. Ideal for wood-loving and straw-loving gourmet mushrooms.
• SELF-HEALING INJECTION PORT – Features a durable, commercial-grade injection port for clean and easy inoculation using liquid culture or grain-to-bag methods.
• .2 MICRON FILTER PATCH – Built-in air/gas exchange filter maintains proper airflow while helping protect the substrate from airborne contaminants during colonization.
• SUPERFINE STRAW PULP – NO SHARP STEMS – Unlike typical chopped straw, our substrate uses finely milled straw pulp to prevent bag punctures and promote faster, more uniform colonization.
• PERFECT FOR OYSTER & LION’S MANE SPECIES – Formulated for excellent performance with all Oyster varieties (Pearl, Blue, Pink, Golden, Italian) and Lion’s Mane. Great for beginners and experienced growers.
• PASTEURIZED & READY TO USE – Each 4 lb substrate bag is fully pasteurized and sealed in a clean environment, offering excellent shelf life and reliable results.
• MADE BY SHROOMABILITY – Expertly crafted by a trusted U.S.-based brand specializing in gourmet mushroom substrates and grow supplies.
Prep Kit Included: Nitrile gloves, alcohol swabs and a face mask.
