Keep your magic mushroom grow kit safe from contamination during the cold-water soak. The Soaking Bag is a 50-micron Ziploc PE pouch sized for standard grow kits — sealed dunking in the fridge, with no exposure to leftover food smells or condensation drips. Reusable across multiple soaks.
Read your kit's instructions first
Not every grow kit needs to be dunked. Soaking is the right rehydration method for some kits, but other kits use a different protocol — and dunking the wrong type can damage the kit or kill your harvest. Always check the instructions that came with your specific grow kit before you start soaking.
Why dunk a grow kit?
For grow kits where soaking is the right rehydration method, the substrate dries out as flushes are harvested and the mycelium consumes its moisture reserves. A 12-hour cold-water soak rehydrates the cake and signals the mycelium to fruit again — often coaxing 2–4 flushes from a single kit.
Why use a soaking bag specifically?
The fridge isn't a clean room. Soaking your kit in an open bucket or container exposes the substrate to airborne bacteria, leftover food residue and condensation drips. A sealed soaking bag is the cheapest contamination control you can buy.
Specifications
Soaking Bag specifications| Spec | Value |
|---|
| Outer dimensions | 40 × 40 cm |
| Material | Polyethylene (PE), Ziploc-style |
| Film thickness | 50 micron (50 µm) |
| Seal | Ziploc resealable top |
| Use | Reusable, food-safe PE |
| Best for | Cold-water dunking of grow kits in the fridge |
The dunk protocol — 4 steps
Only use this protocol if your grow kit's own instructions confirm soaking is the right rehydration method.
The dunk protocol — 4 steps| Step | Action |
|---|
| 1 | After a flush is harvested, transfer your grow kit into the soaking bag. |
| 2 | Fill the bag with cold tap water until the kit is fully submerged. Seal the Ziploc top. |
| 3 | Place the sealed bag in the fridge for 12 hours. The cold rehydration triggers the next flush. |
| 4 | Drain off the water, return the kit to its perlite tray and resume fruiting conditions. |
Frequently asked questions
Frequently asked questions| Question | Answer |
|---|
| Do all grow kits need to be dunked? | No — not every grow kit should be soaked. Always read the instructions that came with your specific grow kit before you dunk. Some kits are designed for a different rehydration method, and dunking the wrong kit can damage it. |
| Why dunk a grow kit? | Mushroom grow kits that benefit from soaking dry out as flushes are harvested. A 12-hour cold-water dunk rehydrates the substrate and signals the mycelium that conditions are right for another flush. |
| Why use a soaking bag instead of a bucket? | Household fridges aren't sterile. A sealed soaking bag isolates the kit from leftover food residue, condensation drips and bacteria that live in the fridge environment. |
| How many soaks per kit? | Typically one cold-water dunk between flushes. Most grow kits give 2–4 flushes, so you may dunk 1–3 times over the kit's lifetime. |
| Can I reuse the bag? | Yes — the soaking bag is reusable. Rinse it out with clean water after each dunk, let it air-dry fully, and store it folded for the next soak. |
| Does it work with magic truffles? | Soaking bags are designed for mushroom grow kits with a substrate cake. Truffle grow kits use a different rehydration protocol — check your kit's instructions. |
Reuse and care
The soaking bag is reusable. After each dunk, rinse the bag with clean water, let it air-dry fully before folding, and store it dry until the next use. Replace the bag if it develops tears or pinholes that compromise the seal.