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Magic Mushroom Grow Bags
A magic mushroom grow bag is fully colonised Psilocybe cubensis substrate that fruits inside the bag it is delivered in. Our Ready-to-Grow Bag XL comes in one size and 15 strains, arrives closed with a sealing sticker and is started on arrival, with no soaking or transferring first. It suits growers who want to touch the substrate as little as possible. Prefer to pick a size? See our magic mushroom grow kits. New to bags? The Bag Starter Set adds a heat mat and heat guard at a lower price.
What a Ready-to-Grow Bag XL is
The bag is a living product. Inoculation and colonisation are done before it ships, so it is ready to fruit when it arrives. One top corner is cut off for air exchange and closed with the supplied sticker, and an elastic band around the bag helps prevent side pins. Leave the band in place for the whole grow.
Grow bag or grow kit?
| Ready-to-Grow Bag XL | Grow kit | |
|---|---|---|
| Sizes | One size (XL) | Medium 750 cc, Large 1200 cc, Extra Large 2100 cc |
| Strains | 15 | 16 |
| Before the first flush | Start on arrival, no soak | Cold soak in the fridge for 9–12 hours, then into the filter bag |
| Storage before use | None, start straight away | Fridge at 3–5 °C, ideally start within 2 weeks (keeps up to 3 months) |
| Fresh air | Cut corner closed with a sticker | Filter bag, folded and sealed |
| Flushes | Usually 2–4 | Usually 2–4 |
| Heat mat for a cool room | 7 W | 5 W (750 cc) or 7 W (1200 and 2100 cc) |
In short: take the bag if you want the fewest steps and can start the day it arrives. Take a grow kit if you want to choose a size or need to keep it in the fridge for a while. The longer comparison is in grow kits vs grow bags.
Strains available as a grow bag
Nine strains come both as a bag and as a grow kit: Golden Teacher, B+, McKennaii, Mazatapec, Penis Envy, Yeti, Jedi Mind Fuck, Jack Frost and Hillbilly Pumpkin. Six are only available as a bag: Brazil, APE (Albino Penis Envy), Enigma, Makilla Gorilla, MVP and Bluey Vuitton.
For a first grow, Golden Teacher, B+, Mazatapec and Brazil are rated easy. McKennaii, Jedi Mind Fuck and Hillbilly Pumpkin are moderate, while Penis Envy, APE, Yeti and Jack Frost are advanced. The newer strains each have a page in the magic mushroom strain library.
Getting a grow bag started
- Place it in bright, indirect light, never direct sun, at a steady 23–25 °C and below 27 °C.
- Keep the corner sealed until pins appear. From then on, open the sticker for fresh air and press it firmly back afterwards.
- In a cool room, use the 7 W heat mat with a silicone heat guard between mat and bag.
The full routine, including harvesting and further flushes, is in how to use a Ready-to-Grow Bag.
Frequently asked questions
What is a magic mushroom grow bag?
A grow bag is a sealed bag of substrate fully colonised with Psilocybe cubensis mycelium, in which the mushrooms grow without being transferred. Mondo's Ready-to-Grow Bag XL comes in one size and 15 strains and is started on arrival.
Is a grow bag easier than a grow kit?
It has fewer steps: there is no soak and no filter bag to set up before the first flush. The trade-off is less choice in size and timing, because a bag cannot be stored for later. For a first grow, both work well in an easy strain such as Golden Teacher or B+.
Can I keep a grow bag in the fridge and start it later?
No. A Ready-to-Grow Bag is a living product and should be started on arrival. If you need to wait, a grow kit is the better choice: it can be stored closed in the fridge at 3–5 °C and started within 2 weeks ideally, up to 3 months at most.
How many flushes does a magic mushroom grow bag give?
Usually 2–4, with later flushes smaller than the first. Clean handling and a steady 23–25 °C help the bag keep producing.
Why is there an elastic band around the bag?
The band helps prevent side pins, mushrooms that start growing between the substrate and the plastic. Leave it in place throughout the grow.
