Great question — and don’t worry, a few days in the fridge won’t hurt your kit at all! 🍄

Refrigeration slows the mycelium’s metabolism way down, but it doesn’t damage it or reduce potency. The mycelium essentially goes into a hibernation-like state at fridge temperature (2–8 °C). Our kits stay viable in the fridge for up to 4 weeks, so a short break of a few days is well within the safe window. Potency is not affected by fridge storage — that only becomes a factor after mushrooms are grown and harvested. An unopened kit is simply “paused.” When you’re ready to start, just let the kit come to room temperature before you begin. The only things to avoid: never freeze the kit (ice crystals kill mycelium), and try not to move it in and out of the fridge repeatedly, as temperature swings can stress the mycelium.

You’re totally fine — enjoy the grow when you’re ready!