Substrate & amendments: prices across US vendors
1 species and 35 current listings at 2 vendors, updated July 20, 2026. Every price on this page is per bag, and all of it is one product category — so these numbers are directly comparable. A bag here is never compared to a product in another category.
Bulk growing media and amendments — master's mix, CVG, coco coir, supplemented sawdust. Priced per bag.
By species
| Species | Low | Median | High | Listings | Vendors |
|---|---|---|---|---|---|
| Paddy Straw | $19.52 | $19.52 | $19.52 | 1 | 1 |
Prices are per bag. Each species links to its own page, where this and every other category it sells in is broken out separately.
Species not specified
34 listings in this category don't name a single species (generic substrate & amendments). They're compared here among themselves, per bag.
| Vendor | Listing | Per bag | Listing price | Stock | |
|---|---|---|---|---|---|
| North Spore | 'Myco Coco' Compressed Coco Coir Substrate & Casing Layer | $5.99 | $5.99 | in stock | view → |
| Out-Grow | Manure Based Mushroom Substrate - 1lb Bag | $7.98 | $7.98 | in stock | view → |
Price history (daily median)
This chart is just getting started — we add a new point every day, so check back as the history builds.