Fast Flowering Cannabis Seeds — Accelerated Photoperiod Genetics for the UK — Page 6
Page 6 of fast flowering seeds at Royal King Seeds. Continue browsing the range below.
209 strains available
Fast Flowering Seeds catalogue at a glance
Our fast flowering seeds collection currently holds 209 strains in active inventory with verified THC content ranging from 5% at the low end to 30% at the high end (median 20%).
- Autoflowering: 209 strains (100% of the catalogue) — finishes 8-10 weeks seed-to-harvest.
- Indica-dominant: 209 — body-led effects, compact structure, Myrcene-Caryophyllene terpene signature typical.
- Alphabetical lineup starts with: 3X Crazy, 5th Element, 9 Pound Hammer — see the full grid below for filters, lab data and grower reports.
Fast Flowering Seeds — Browse All Strains
How Fast Flowering Seeds Differ From Standard Photoperiods
Fast flowering genetics achieve shorter bloom cycles through selective breeding with naturally early-finishing lineages or by incorporating a trace of ruderalis heritage — enough to accelerate flower development without making the plant fully autoflowering. The result is a plant that still requires a 12/12 light flip to initiate bloom but completes the flowering phase seven to fourteen days sooner than its standard counterpart. For outdoor growers in Scotland, northern England and upland Wales, those extra days can be the difference between a clean harvest and mould-damaged flowers caught by late-autumn rain.
Fast Flowering Strains Worth Growing
Quick One wraps up the entire seed-to-harvest cycle in roughly eight weeks. Fast Buds Critical completes flowering in six weeks. Speed Haze finishes in eight weeks rather than the twelve its standard version demands. Fast Gorilla Glue delivers the parent strain's legendary potency with a seven-week bloom window. Each of these strains maintains competitive potency and yield relative to their slower siblings. Indoor growers running fast-flowering genetics can fit an additional harvest cycle per year.
Deciding Between Fast Flowering and Standard Autoflower Seeds
Both categories offer speed, but the mechanism differs. Fast flowering seeds are still photoperiod — you control vegetative duration and flip to flower when ready. This preserves the ability to veg plants to any size and to clone mothers. Autoflowers bloom on their own timeline with no grower intervention. If you want speed combined with the flexibility of photoperiod light control, fast flowering seeds are the answer. If you want maximum simplicity with zero light-schedule management, autoflowers win.
Frequently Asked Questions
How quickly do fast flowering strains finish?
Are fast flowering seeds the same thing as autoflowers?
Do faster bloom times reduce yield?
Who benefits most from fast flowering seeds?
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Fast Flowering Seeds A–Z — part 6 of 9
23 of 209 strains, in alphabetical order. The index continues on the next page. Use the search bar above to find any strain.
