All six strains in the Pyramid Seeds fast-flowering range are feminized photoperiod plants — they finish their flowering stage faster than standard feminized varieties, without becoming autoflowering. This listicle ranks them by flowering speed (days under LED), so you can find the fastest photoperiod strain for your grow at a glance.
Not sure what fast version seeds are or how they differ from autoflowering? See our full guide to fast version seeds or the overview of all seed types.
What Makes a Cannabis Strain Fast-Flowering?
The short version — before the list.
Fast-flowering strains are photoperiod feminized plants that have been bred to complete their flowering stage more quickly than the original version of the same genetics. The technique involves crossing a standard feminized strain with a selected autoflowering variety to introduce the early-finish trait, then backcrossing over multiple generations to remove the automatic-flowering gene while keeping the shortened cycle.
The result is a plant that still needs a light schedule change to begin flowering — indoors, the standard switch from 18 to 12 hours; outdoors, the natural shortening of days — but wraps up that flowering stage 2–3 weeks earlier than the standard feminized version. All flowering time data below is from Pyramid Seeds catalogue specifications and refers to days from the start of the 12/12 light period under LED.
Fastest-Flowering Pyramid Seeds Strains — Ranked by Days
All six fast-flowering feminized strains, ordered from fastest to slowest flowering time under LED.
Flowering time: 43 days under LED (51 under HPS)
Buy Super OG Kush Fast
Flowering time: 43 days under LED (51 under HPS)
Buy Gorila Fast
Flowering time: 45 days under LED (48 under HPS)
Buy Galaxy Fast
Flowering time: 45 days under LED (50–55 under HPS)
Buy Wembley Fast
Flowering time: 48 days under LED (53 under HPS)
Buy Tutankhamon Fast
Flowering time: 53 days under LED (58 under HPS)
Buy Kryptonite FastTry Several Fast Strains in One Pack
If you cannot decide between them, the Power Mix Fast pack brings four of these strains together — Gorila Fast, Galaxy Fast, Tutankhamon Fast and Kryptonite Fast, three feminized seeds of each, 12 in total. Flip them to 12/12 on the same day and you can compare how each one finishes in your own setup; the day-by-day plan is in our guide to fast flowering seeds outdoors.
Buy POWER MIX FASTFast Flowering vs Autoflowering: Which Finishes Sooner?
These two get confused constantly, and the answer depends on what you are measuring. An autoflower finishes the whole cycle sooner because it never has a separate vegetative stage — seed to harvest in around nine to eleven weeks on average, and some finish faster depending on conditions and pot size. A fast version strain has the shorter flowering stage, but you decide how long it vegetates first.
That distinction matters in practice. If your limit is total calendar time — a short summer, a borrowed space, one tent and no patience — autoflowering wins. If your limit is flowering time and you want the yield that comes from a properly grown photoperiod plant, fast version wins. The full comparison is in our guide to fast version seeds.
Fastest Autoflowering Strains in the Range
If total cycle time is what you are chasing, these three are the quickest routes from seed to jar in the Pyramid Seeds catalogue.
Auto Alpujarreña is the outright fastest, completing its whole cycle from seed in 43 to 48 days under LED, with Auto Shark and Auto Super Hash both finishing around 58 days from seed. All three are indica-dominant, compact, and forgiving enough for a first grow — more of them in our guide to autoflowering seeds for beginners.
What Slows a Fast Strain Down
A fast genetic still needs the conditions to express it. The usual culprits behind a strain finishing later than the pack says:
- Weak light in flower. Under-powered lamps stretch the ripening phase and thin the buds. Intensity, not hours, drives the finish.
- Late stress. Heavy defoliation, a late transplant or a nutrient lockout in week three or four pushes harvest back by a week or more.
- Waiting for every last pistil. Judge ripeness by trichomes, not hairs. Mostly milky with a little amber marks peak THC. Letting more trichomes turn amber is a matter of preference, but it converts THC into CBN, and waiting for 100% amber adds a week or more.
- Cool nights. Below roughly 18 °C the plant slows down. A steady 20–26 °C keeps the schedule on track.
All six strains in the Pyramid Seeds fast-flowering range — feminized, photoperiod, shorter finish.
How to Speed Up Flowering Further
A few practical levers — beyond choosing a fast strain.
- Switch to 11/13 instead of 12/12. Reducing the light period to 11 hours (rather than the standard 12) during flowering can push some strains to finish a few days earlier. Not all strains respond the same way — test with one plant before applying to a whole grow.
- Keep temperatures in the right range. Flowering progresses best between 20–26°C. Temperatures consistently above 28°C slow trichome development and can stretch the flowering window. Keeping nights 5–8°C cooler than daytime supports healthy flowering and resin development, as long as they do not drop below 18°C.
- Dial in nutrition for the late flowering stage. Flushing or reducing nutrients in the final 1–2 weeks forces the plant to use its remaining resources to ripen buds rather than continuing to grow. Combined with close trichome monitoring, this is the most reliable way to harvest at peak ripeness without going over time.
- Watch the trichomes, not just the calendar. Flowering time data is a guide, not a guarantee. A loupe or pocket microscope for checking trichome colour is the most accurate way to confirm that the plant is actually ready. Mostly milky trichomes with a little amber mark peak THC. The more amber you allow, the more THC converts into CBN and the heavier, more relaxing the effect becomes, so the exact moment comes down to the grower's preference.
FAQ: Fastest-Flowering Cannabis Strains
What is the fastest-flowering cannabis strain?
Among Pyramid Seeds fast-flowering feminized strains, Super OG Kush Fast has the shortest documented flowering time at 43 days under LED. It is followed by Wembley Fast at 45 days and Galaxy Fast at 48 days. Gorila Fast, Tutankhamon Fast, and Kryptonite Fast all finish in the 6–7 week range. All of these are photoperiod plants — they require a light schedule change to begin flowering. If absolute minimum time from seed to harvest is the priority regardless of plant type, autoflowering strains can finish the full cycle (seed to harvest) in 70–75 days, which may be faster overall depending on how long the vegetative stage runs.
How many weeks do fast strains take to flower?
Fast version strains in the Pyramid Seeds range flower in 6–7 weeks from the start of the 12/12 light period under LED — with Super OG Kush Fast finishing in as little as 43 days (approximately 6 weeks) and Galaxy Fast in 48 days. This is typically 2–3 weeks shorter than the standard feminized version of the same genetics. Exact timing varies by strain, growing conditions, and light intensity — the data above refers to indoor cultivation under LED.
Is a fast version strain quicker than an autoflower?
It has the shorter flowering stage, but an autoflower finishes the whole cycle sooner because it skips a separate vegetative period. Fast version gives you more control and usually more yield; autoflowering gives you the shortest calendar time from seed to harvest.
Does a shorter flowering time mean weaker buds?
No. Potency is set by genetics and by how the plant is grown, not by the length of the flowering stage. Several of the fastest strains in the range sit in the same THC bracket as their standard-flowering counterparts.
Can you make any strain flower faster?
Only within its genetic range. Strong light in flower, stable temperatures, no late stress and harvesting at the right trichome window will hit the low end of the stated range — but you cannot turn an eight-week strain into a six-week one.
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