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Jack Frost — Ready-to-Grow Bag XL — Cloud920®
Jack Frost is the most potent Psilocybe cubensis in our catalogue — a deliberate cross between True Albino Teacher and Albino Penis Envy, bred by Dave Wombat in 2018. Snow-white mushrooms, flat caps that curl upwards, and a psilocybin content of 10–12mg per gram: this strain is reserved for growers who are ready for it.
First pins typically appear between 3 and 5 weeks. This is by design. Adjust your dose accordingly.
Availability: Coming back soon
€52.50
Product Description
Details
Jack Frost is not for the impatient — and that's exactly why it has a cult following. This snow-white Psilocybe cubensis is the strongest cubensis in our catalogue, bred for extraordinary potency and a frosty appearance unlike anything else you have grown. It takes its time. It rewards patience. And once it fruits, it does not disappoint.
Part of the Cloud920® Genetic Series — Hybrid Fusion
Origin & Genetics
Jack Frost is a deliberate cross between two albino legends: True Albino Teacher (TAT) and Albino Penis Envy (APE). From TAT it inherits reliable yields, strong flush potential, and a forgiving temperament. From APE it inherits its concentrated potency and slow, methodical growth. The result is a strain that looks like both parents — fully white, frostbitten stems and caps that curl upwards like snowflakes — and hits harder than either of them alone.
Why Choose Jack Frost?
- Strength: ★★★★★★ (6/6) — the strongest cubensis we carry. Even experienced users recommend starting low at 1–1.5g and working up from there.
- Documented genetics — unlike most cubensis whose origins are folklore, Jack Frost has a traceable breeder and verified parentage. You know exactly what you are growing.
- Multiple heavy flushes — expect 400–800g fresh across multiple flushes from one kit.
- Built for the bag format — Jack Frost's slow colonisation style suits the sealed Cloud920 bag perfectly. Minimal intervention, maximum result.
⚠️ Jack Frost takes longer than most strains — and that's a feature, not a bug. First pins typically appear between 3 and 5 weeks after setup. This is not a sign of a failed kit. Jack Frost grows slowly because it puts its energy into density and potency rather than speed. Growers who stay patient are consistently rewarded with heavy, thick-stemmed flushes. If you're at week 3 with no pins yet: you're exactly on schedule.
What's in the Box
- 1x Cloud920 Grow Bag — 2000cc pre-colonised substrate with active Jack Frost mycelium. Integrated micron filters provide passive air exchange and contamination protection.
- 1x Large bag clip — to seal the bag securely between ventilation sessions.
- 1x Rubber band — place around the substrate block to prevent unwanted side growth.
How the Cloud920 Grow Bag Works
- Open once — fold the bag open in a clean space to allow fresh air in and trigger pinning.
- Place and wait — put the bag in indirect light at 23°C. No soaking, no misting required in the first phase.
- Air daily from week 2 — briefly open and refold the bag once a day to encourage pin development.
- Harvest and repeat — twist and pull mushrooms at the base before caps open fully. Rehydrate and repeat for additional flushes.
Instructions
The Cloud920 Ready-to-Grow bag does not include printed instructions. Find the full step-by-step guide here: Cloud920 Grow Bag Instructions.
Additional Info
Additional Info
| Productcode | MCS.GKC920.JFRO-XL |
|---|---|
| Weight (KG) | 1.4000 |
| Mushroom Strain | Jack Frost |
| Brand | Cloud920® Grow Bag |
| Difficulty | Very Easy |
| Size | Extra Large |
| Species | Psilocybe cubensis |
| Origin | United States |
| Potency | High |
| Optimum cultivation temperature | 23ºC |
| Yield (from) | 200 grams |
| Yield (to) | 800 gram |
| Water Spray Needed | Yes |
Customer Reviews
- Perfect Jack Review by Raven
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I love this kit. Super easy to grow. First two flashes are growing with no problem, no watering, no doing anything. From first two flushes i got 300gr of wet weight.Rating
Now waiting third flush after watering the cake
I took 3,5 grams for the first time with jack! I tell you that was the best geometrical super knowledgeable trip ever. Next time i want to try to take Jack Frost + Golden Teacher.
Guys from support helped and answered all my questions.
Love this website, respect team and love the products (Posted on 1/7/2025) - Horrible did grow Review by Morgane
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Didn’t grow at allRating
(Posted on 12/20/2024) - Big shrooms Review by Esmeralda
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So for this grow bag i had some issues, the mycelium went upwards up onn the bag and nothing was hapennig,so i wrote to support and,Frank was great with instructions,so i just had my first harvest around 160g fresh. Now set up to dry them,and set the bag for next round. Havent tried them yet tho,so i cant say anything about how they work :) (Posted on 12/9/2024)Rating - Kit works really well! Review by Chris
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Sweet! I got around 450-480g fresh weight from 3 flushes. After the 2nd and 3rd flush i soaked the cake and left it in the fridge over night. Now waiting for the 4th flush :)Rating
Very easy to handle growing process overall, especially for beginners! Doesn't need extra water or airing for the first 2 flushes. Love this kit and will buy again for sure! (Posted on 12/7/2024) - Top! Review by Walter
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While my first kit had an overgrow mycel and did not perform, had slow growth and not more than 2 pins, thanks to the great support team of magic mushroom shop it was replaced. The replacement gave me a first flush of wet 447g - nearly half a kilo. Dry approx a tenth so 45g. So a really good performance. After that it was a little dry and broke out while harvest. It is soaked currently for 4 to 8h. I am happy with that initial performance an will see how man flushes there will be. One good hint. Frost like it a little colder. Don't go under 21°C but they love 22 more than 24 if you can't hold the 23°C. Work clean as usual. Thank you MMS! You are simply the best in terms of great kits and customer service. (Posted on 11/18/2024)Rating - Impressive and beautiful Review by Evo.Cata
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I placed them in a selfmade growbox. Ventilated and with a self-adjusting heater. From 23°C to 24°C was the temperature which the Kit had all the time. They grew quickly, first flush was 27g (harvested after 12h when the first velum broke up; completely dried, even the biggest shroomigos) - massive and impressive.Rating
And Jack Frost is pretty potent. I would definitely recommend to try first 0,5g before doing higher doses. (Posted on 10/24/2024) - Best Review by Filip
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Very very good. (Posted on 10/23/2024)Rating - New purchase Review by Boris
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This was something new i tried and it's good but i liked Amazonian PES better although this was not bad just diffrent. (Posted on 10/19/2024)Rating - Top !!! Review by Mirko
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I was on them continuously for 10 days, 3 grams every day. A really great species. I did all the work, and had the visuals at the same time. Lots and lots of energy (Posted on 10/14/2024)Rating - White beauties Review by Nikola
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Extremely easy to nurture, practically no effort needed.Rating
Unfortunately received a slightly contaminated kit, however still managed to get 2 flushes out of it, which shows their power ;D (Posted on 10/7/2024) - very satisfied Review by Alex
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didnt try them myself yet but my friends said it was great experience not mush difficulty with growing aswell so they are very good strain to get (Posted on 9/29/2024)Rating - Lätt odlade och mycket potenta svampar. Review by carlos
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Bästa och enklaste growkits bara packa upp ventilera på med klämman och sen bara att vänta på första skörden. Massiva crame vita svampar och riktig potenta tyckte till och med att ruset varade ett par timmar längre än normalt. (Posted on 9/10/2024)Rating - Best grow kits Review by carlos
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Very eazy grow kits, just set upp and wait.Rating
Very potent will defently bye thoes again. (Posted on 9/10/2024) - !!!! Review by Luke
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Really good product and very helpfull staff love it (Posted on 9/7/2024)Rating - Hohe Qualität Review by Irene
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Die Growbox ist 1A. Das Jack Frost Grow Kit entspricht exakt der Beschreibung. Es war noch nie so einfach Zuhause zu züchten. Die Menge die da raus kommt ist unglaublich. Der erste Pilz wog ungetrocknet allein schon 250 Gramm und die Wirkung ist mega! Ich finde die Intensität genau perfekt, sowohl feelings wie auch Optiks. Das Auge nach innen richten hat damit super geklappt. Ich bin gespannt auf die nächste Zeremonie in Gesellschaft.Rating
Die Endausbeute kann ich noch gar nicht angeben, weil es noch nicht aufgehört hat nachzuwachsen. Aber es ist sehr viel bis jetzt und es sind noch viele Pilze zu sehen, die gerade anfangen heranzuwachsen.
Klare Kaufempfehlung! (Posted on 9/4/2024) - Why not... Review by Al
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Very easy to grow and wonderful harvest! Also the strenght of this mushroom is really particular and beauty. I reccomend this product (more easy to grow, more shrooms, more strenght...)Rating
So, why not? (Posted on 9/4/2024) - Top!! Review by Alis
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Potentissimi e magici, con 0,8 bellissimi viaggi, 2g viaggio extrim!! (Posted on 8/30/2024)Rating - Snow White Review by Tony
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I love this grow kit.Rating
Very easy to use. Effortless growing. All I had to do was release the air into the bag and wait for a week. The first flush i got 300 g. of wonderful snow white shrooms.
The effect is quite pleasant. For me 1g. of dried shrooms is a lift up.
definitely my favorite.
I will buy again. (Posted on 8/22/2024) - Awesome Kit, Awesome support Review by Duarte
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the kits produce the biggest mushrooms i've seen, White as they grow, blue as you pick them up hahaha you know the drillRating
6* review for this one (Posted on 8/15/2024) - After initial problems, towards my favorite growkit! Review by Joshua
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Had a few problems with my first growkit but after a short conversation with the friendly support and the sending of a second growkit, I am more than satisfied. It's easy to grow and since I'm often away for a week due to my work, it's the perfect growkit for me. The variety is very strong but the high is pleasant with many optical effects. It is also a very good variety to make tea or soda in order to reduce the nausea. (Posted on 7/26/2024)Rating
Important information about Jack Frost — Ready-to-Grow Bag XL — Cloud920®
- The purchase of this product is restricted to individuals who are at least 18 years old.
- By initiating a purchase, you confirm knowledge of and compliance with the legal terms regarding the product(s) in your country of residence, as well as your eligibility to acquire and hold them.
- Shipping restrictions apply to this product. Refer to Additional Info to discover our non-delivery zones.
- Engaging in the consumption of magic mushrooms is solely your responsibility, so be certain to thoroughly educate yourself about their usage and consequential effects.
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