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🎁 10 FREE seeds with orders over $420 · Free shipping over $200 · Germination guaranteed
Fast version seeds are photoperiod plants bred to finish sooner, keeping the yield of the original strain while arriving one to two weeks earlier.
Fast version marijuana seeds are photoperiod cannabis seeds bred to finish flowering one to two weeks earlier than the original strain. Breeders cross a photoperiod strain with an autoflowering parent and stabilise the result, so the plant still flowers on a 12 hour light cycle but wraps up sooner, keeping photoperiod-sized yields.
Last updated: July 2026
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Breeders cross a photoperiod strain with an autoflowering parent, then stabilise the result over generations. The plant keeps responding to light like a normal photoperiod strain, but flowering wraps up noticeably faster.
Autoflowers flower automatically and finish fastest overall, but stay small. Fast version plants still respond to light, so you keep full control of when they flower and you keep photoperiod-sized yields. They are the middle ground: nearly the harvest of a standard strain, arriving earlier.
Treat them exactly like standard photoperiod plants: long light hours to vegetate, then twelve hours to flower. Just start checking trichomes earlier than you would with the original strain. Compare with our feminized seeds for maximum yield or autoflower seeds for maximum speed.
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| Seed type | Starts flowering | Seed to harvest | Plants produced | Best for |
|---|---|---|---|---|
| Feminized | Light cycle (12/12) | 9 to 16 weeks total | Female only | Biggest yields per plant |
| Autoflower | Age, about 3 to 4 weeks | 8 to 10 weeks total | Female only | Speed and short seasons |
| Regular | Light cycle (12/12) | 9 to 16 weeks total | Male and female | Breeding and mother plants |
| High CBD | Depends on variety | 9 to 14 weeks total | Female only | Low THC, clear-headed |
| Fast Version | Light cycle (12/12) | 8 to 12 weeks total | Female only | Full yield, earlier finish |
| Auto CBD | Age, about 3 to 4 weeks | 8 to 10 weeks total | Female only | Easiest low-THC grow |
Times shown are typical ranges from seed to harvest and vary with strain, climate and setup.
Fast version strains typically finish flowering about one to two weeks earlier than the standard photoperiod version of the same genetics. Total time from seed to harvest is usually in the 8 to 12 week range.
No. Autoflowers begin flowering automatically after about 3 to 4 weeks and stay small. Fast version plants still respond to the light cycle, so you control when flowering starts and keep the larger structure and yield of a photoperiod plant.
They suit outdoor growers in short-season or damp-autumn regions who need to harvest before frost or bud rot, and indoor growers running back-to-back cycles who want more harvests per year from the same space.
Not meaningfully. That is the point of the category: they keep close to the yield of the original photoperiod strain while finishing earlier, which is what separates them from autoflowers.
Exactly like a standard photoperiod plant. Vegetate under long light hours, then switch to 12 hours to trigger flowering. The only adjustment is to start checking trichomes earlier than you would with the original strain.
Yes, the fast version seeds sold by MJ Seeds Canada are feminized, so every seed is bred to grow a female, bud-producing plant.
