UW Strain — Effects, Genetics, Grow Guide & Where to Buy
UW earned its place in the modern cannabis canon for a reason — and the genetics live up to the reputation. It is a indica-dominant (80% indica / 20% sativa) testing at roughly 22% THC, with a flowering window of 8-10 weeks under a 12/12 photoperiod. Below we walk through what to expect from the high, how the plant grows in a tent or outdoor garden, the parental genetics behind the cultivar, and how to get UW seeds delivered anywhere in the US.
UW Quick Stats
THC
22%
Indica
80%
Sativa
20%
Autoflower
No
Flowering
8-10 weeks
Difficulty
intermediate
Indoor Yield
450-550 g/m²
Outdoor Yield
500-700 g/plant
Plant Height
120-180 cm
UW Effects & Experience
UW is best known for happy, relaxed, sleepy. The effects come on within the first 10 minutes and settle into a stable plateau that lasts 90 minutes to two hours at typical doses. Growers and users consistently note that the high stays true to its profile rather than drifting — what you feel in the first 20 minutes is what you have for the next 90.
Growing UW
Growing UW fits indoor growers in compact spaces; indica genetics stay short and bushy without aggressive training. UW is photoperiod, which means you control when it flowers by switching from 18/6 (vegetative) to 12/12 (flowering). Most indoor growers veg for 4-6 weeks before the flip. Indoor yields land around 450-550 g/m² under quality LED, and outdoor plants given full sun and 5-7 gallon containers reliably produce 500-700 g/plant. Expected plant height is 120-180 cm, with intermediate cultivation difficulty. Practical tips that move the needle: top once at the 4th node to encourage 4-6 even main colas instead of one dominant cola; and flush nutrients in the final 10-14 days for cleaner flavor; trichomes finish properly even on plain pH-adjusted water. The most common challenge growers report is late-flower humidity if your indoor RH climbs above 55% during the final two weeks.
UW Lineage & Genetics
This cultivar comes from the Royal King Genetics breeding program — an in-house line developed for fast finishing and heavy yields under indoor conditions. Phenotype consistency is the result of multiple generations of selection rather than commercial seed-run breeding.
Where to Buy UW Seeds in the USA
UW seeds ship from Royal King Seeds to all 50 US states with discreet packaging and a 95% germination guarantee. Average delivery is 3-5 business days, with the fastest routes typically reaching Alaska, Arizona, Arkansas, California, Colorado.
UW FAQ
Is UW indica or sativa?+
UW is a indica-dominant with a 80% indica / 20% sativa split. The effects lean toward physical relaxation and a calm, settled headspace.
How long does UW take to flower?+
UW flowers in 8-10 weeks once you flip to 12/12 light cycle. Outdoor harvest typically lands in late September to mid-October across most US zones.
What is the THC content of UW?+
UW tests at approximately 22% THC when grown to its potential. Real-world numbers depend on grow conditions, harvest timing, and curing — well-grown phenotypes can land at the high end of that range, while poorly cured flower tests lower.
Is UW good for beginner growers?+
UW is rated intermediate difficulty. Photoperiod genetics give you control over plant size and harvest timing, which means a bit more responsibility for getting the schedule right. Most growers with one harvest behind them handle this strain without difficulty.
Where can I buy UW seeds in the USA?+
Royal King Seeds ships UW seeds to all 50 US states with discreet packaging, 3-5 day delivery, and a 95% germination guarantee. The product page is at https://royalkingseeds.us/uw-feminized — checkout accepts standard cards, Apple Pay, and crypto.