Return Policy

All sales are final at time of transaction for dried mushroom products including mushroom powders.
We cannot accept returns of food items or supplements.
Tshirts can be exchanged for a different size. Buyer is responsible for the cost of shipping.
No refunds on opened spawn, dowels, or kits.
Herb n Oyster guarantees contaminate free spawn at the time of transaction. We inspect each product before shipping to ensure purity. If there is visible contamination on a unopened bag of grain, sawdust, or plug spawn within 10 days of purchase, please photograph and email a picture to We will review, refund or exchange as necessary.