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Mac Galactic — Ready-to-Grow Bag XL — Cloud920®
Mac Galactic is a JMF × Melmac cross — fast-colonising, thick-stemmed, and rated ★★★★★☆ (5/6) for potency. Created by Denver Spore Company, refined by Full Canopy Genetics. Expect your first pins within two weeks.
Availability: In stock
€52.50
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Product Description
Details
Mac Galactic is the fast one. Where Jack Frost makes you wait weeks, this strain colonises aggressively and throws its first pins in as little as two weeks. It's a cross between Jedi Mind Fuck and Melmac — two strains known for speed and size respectively — and the combination delivers exactly what you'd expect: dense canopies, thick stems, and a potency rating that puts it above most cubensis in the catalogue.
Part of the Cloud920® Genetic Series — Hybrid Fusion
Origin & Genetics
Mac Galactic was originally isolated by Eric Burden of Denver Spore Company as a cross between JMF (Jedi Mind Fuck) and Melmac. Eric selected for a balance of size, potency, and consistency — and then Full Canopy Genetics took it further, refining the isolation for canopy density and biological efficiency. From JMF it inherits its aggressive colonisation speed and reliable flush potential. From Melmac — a strain loved for its massive, phallic fruit bodies and above-average potency — it inherits its sheer size and thick-stemmed morphology. The result is a strain that never drops spores, consistently produces large canopies, and rivals some of the strongest cubensis available.
Why Choose Mac Galactic?
- Strength: ★★★★★☆ (5/6) — high potency that rivals many 6/6 strains. Full Canopy Genetics describes its alkaloid content as "incredibly potent." Not one to underestimate.
- Fast and aggressive — first pins typically appear within 14–21 days. One of the quickest strains in the Cloud920 range.
- Thick, dense flushes — large fruit bodies with caps up to 8 cm and heavy stems. Expect 400–800g fresh across multiple flushes.
- Documented pedigree — created by Eric Burden (Denver Spore Company), refined by Full Canopy Genetics. Traceable genetics, no guesswork.
What's in the Box
- 1x Cloud920 Grow Bag — 2000cc pre-colonised substrate with active Mac Galactic 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.
- Ventilate daily from day 10 — briefly open the bag, press out stale air, let fresh air in, close again (under 30 seconds). Stop when pins appear; resume daily ventilation between flushes.
- Harvest and repeat — see "When to harvest" below for the right timing. Twist and pull at the base. Rehydrate and repeat for additional flushes.
When to harvest Mac Galactic
Mac Galactic is a hybrid strain and does not follow the classic "harvest when veil breaks" rule. Its veils often tear early — sometimes just a day or two after pins form — and this is not the harvest signal. Wait for these two indicators:
- Cap edges curl upward — when the caps have fully opened and the edges start to curl or flip up, growth has completed. Do not pick when caps are still expanding.
- Marshmallow-soft stem — gently squeeze the stipe near the base (through the bag is fine). If it feels like celery or a firm apple, wait. If it gives like a slightly deflated marshmallow — springy but soft — harvest now.
Mac Galactic caps often thicken and stall visibly for a day before the marshmallow stage — that plateau is your cue to start touch-checking.
Picking at veil break means harvesting too early and leaving significant size, weight and potency on the table. For full harvest guidance across all strains, see our harvest guide.
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.MGAL-XL |
|---|---|
| Weight (KG) | 1.4000 |
| Mushroom Strain | Mac Galactic |
| 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
- Fastest I have tried! Review by Karel
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Start growing like second or third day after delivery! Beautiful big shrooms, fast, easy, strong! Will come back for these! Thanks MMS <3 (Posted on 10/26/2026)Rating - Firt time and zerro shrooms Review by Janis
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Something wrong with this one (Posted on 9/19/2026)Rating - Top choice Review by Michal
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For the first time, I harvested 400g+ of fresh fruit. I haven’t even tried its full potential yet, but I’m pretty sure it’s gonna be !!!!. Delivery and customer support were top-notch. It was my first kit and everything went really smoothly. Definitely recommend, and I’ll be ordering again for sure. (Posted on 8/20/2026)Rating - 1st Mac Galactic Growing Experience Review by DK
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This is my first experience growing Cloud920 Mac Galactic. It did not disappoint.Rating
I successfully completed three flushes that yielded 25g cracker dry. I am now on to my fourth.
The harvested fruits are potent. Very strong visuals and colours. (Posted on 7/26/2026) - Very potent. Good yeild, defo recommend Review by Rick
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Beautiful strain, very strong, you will get big beautiful fruits if grown well and I love the potency. Definitely recommend (Posted on 7/19/2026)Rating - Steady Review by George
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These takes more time to grow than jack frost but when they do they are marvelous!! (Posted on 7/18/2026)Rating - Always a good choice Review by Martin
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But 2 of them were from a faulty batch, so got them replaced: 10/10 customer support! (Posted on 7/12/2026)Rating - Strong growth. Use antiseptic and harvest the big ones, maybe spray a little every other day. Just let it know where the sun is. . Review by Robert
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I had a fundamental shift from my masks, too astonished gaze and relish in that I could choose witch version of myself I could be. (Posted on 7/10/2026)Rating - Lovely yield Review by Markus
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Any tips for dehydrating theseRating
MMS edit: You can find more information about how to dry your shoorms here: https://www.magic-mushrooms-shop.com/blog/dry-magic-mushrooms (Posted on 7/2/2026) - Top shelf Review by Nikolas
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This strain sits at the top shelf, checks all the boxes and everyone will want to try it again. Devious kind of mushroom (Posted on 6/15/2026)Rating - Galactic experience Review by Elvijs
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It really does grow fast.Rating
The fruits were few, but massive!
With good level of potency.
Strong stuff.
Recommend. (Posted on 4/30/2026) - Excellent customer service. Review by Afonso
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I bought this kit because I wanted to try something new. The kit arrived quickly, but a few days later I was contacted by customer service, who warned me that there was a possibility my kit was contaminated. After a week, the contamination was confirmed. They gave me instructions on what to do and promptly took care of everything so that I received a replacement kit. Honestly, one of the best customer service experiences I've ever had. Five stars. Very professional, efficient and kind. Thank you and congratulations to the whole team.Rating
MSS Edit: Thank you for your kind review! Unfortunately, it sometimes happens that there is an issue with a particular batch, and when that happens, we do our best to reach out quickly and help you out as best as we can. We're very happy to hear that your overall experience was positive nonetheless!
(Posted on 4/17/2026) - Absolutely incredible Review by Melinda
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I absolutely will buy these again. (Posted on 4/7/2026)Rating - Joined the 100g club with these! Review by Lene
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I’ve just harvested some huge mushies with this kit and joined the 100g club with one chunky one! Was really quick to pin and only a few days after pinning was ready for harvest. Really happy with this product! (Posted on 3/21/2026)Rating - Big fat chonky shroms Review by Esmeralda
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So this is the second time i started to grow a box from cloud920. First time i had Jackfrost and now this MacGalactic. Theese are one of the biggest mushrooms i jave ever grown in these few years now. Havent tried them yet tho. But the growing is easy .set up and eait for magic AMAZING (Posted on 1/27/2026)Rating - Amazing Kit and Experience Review by Panos
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Amazing grow kit! Very easy to use. I received it in about a week and a half. After two weeks the first pins appeared, and one week later I had large, healthy fruits. I barely had to do anything. I'm now waiting for the second flush.Rating
The mushrooms are very potent, with strong visuals. Highly recommended. An excellent overall experience, from growing to riding the waves. (Posted on 12/6/2025) - Giant Potent Mushrooms Review by Danny
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This has been my favorite and easiest growbag from the Cloud920's series. I think it took less than a week for the pins to start, and the fruits were enormous and beautiful. I believe I got around 30g dried on my first flush. Going through the second one as we speak. These are very potent. Will definitely be buying the Mac Galactic strain again for sure. Thank you MMS team for your service. (Posted on 12/2/2025)Rating - Great Review by Tom
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Good yield and great trip. 10/10Rating
(Posted on 11/1/2025) - Good yield and effects Review by Tim
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Great yield and visuals. Would buy again. (Posted on 11/1/2025)Rating - 10/10 Review by Bojan
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Big fat mushrooms good yield strong effectRating
customer support was great (Posted on 10/26/2025)
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