HempstarStrain, Effects, Genetics, Grow Guide & Where to Buy
Few cultivars carry the cult following Hempstar has built across the US grow community , and the appeal is easy to explain. It is a sativa-dominant (10% indica / 80% sativa) testing at roughly 22% THC, with a flowering window of 8-10 weeks from seed as an autoflower. What follows is a complete reference: terpene-led effects, genetic background, indoor and outdoor grow guidance, and the fastest way to get Hempstar seeds shipped to your state.
Hempstar Quick Stats
THC
22%
Indica
10%
Sativa
80%
Autoflower
Yes
Flowering
8-10 weeks from seed
Difficulty
intermediate
Indoor Yield
450-550 g/m²
Outdoor Yield
500-700 g/plant
Plant Height
60-100 cm
HempstarEffects & Experience
The dominant effects of Hempstar are euphoric, focused, relaxed, and the experience is more nuanced than a simple high/low/sedating label would suggest. Onset is gradual rather than abrupt, the peak holds for roughly an hour, and the comedown is smooth, which is why this strain shows up in so many "daily driver" lists from experienced consumers.
Growing Hempstar
Growing Hempstar fits short outdoor seasons in the upper Midwest, Pacific Northwest, and Northeast, autoflower genetics finish in 70-90 days from seed regardless of latitude. Hempstar runs on an 18/6 light schedule from seed to harvest, autoflower genetics ignore photoperiod, so there is no flip and no light-cycle change. 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 60-100 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 apply low-stress training in week 2 of veg, bend the main stem horizontally and tie down to expose lower nodes. The most common challenge growers report is training timing, top at the 4th node, not earlier and not later, for the best canopy distribution.
HempstarLineage & Genetics
This cultivar comes from the Royal King Genetics breeding program, an in-house line developed for long-season outdoor expression and complex terpene profiles. Phenotype consistency is the result of multiple generations of selection rather than commercial seed-run breeding.
Where to Buy Hempstar Seeds in the USA
Hempstar 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.
Hempstar FAQ
Is Hempstar indica or sativa?+
Hempstar is a sativa-dominant with a 10% indica / 80% sativa split. The effects lean toward mental clarity, mood lift, and conversation.
How long does Hempstar take to flower?+
Hempstar flowers in 8-10 weeks from seed from seed, since autoflower genetics ignore light cycle. Outdoor harvest typically lands 70-90 days after planting.
What is the THC content of Hempstar?+
Hempstar 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 Hempstar good for beginner growers?+
Hempstar is rated intermediate difficulty. The autoflower genetics simplify the process, no light schedule changes and a fast seed-to-harvest timeline make it forgiving for first-time growers. Most growers with one harvest behind them handle this strain without difficulty.
Where can I buy Hempstar seeds in the USA?+
Royal King Seeds ships Hempstar 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/hempstar-auto, checkout accepts standard cards, Apple Pay, and crypto.