Substrate & amendments: prices across US vendors
1 species and 36 current listings at 2 vendors, updated September 4, 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 | $19.95 | $19.95 | $19.95 | 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.
Not mapped to a tracked species
35 listings in this category aren't matched to a species this index tracks — either generic substrate & amendments that names no species at all, or a species outside our current coverage. 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 | $7.95 | $7.95 | in stock | view → |