Rockstar KushStrain, Effects, Genetics, Grow Guide & Where to Buy
Rockstar Kush is one of the most-searched cannabis strains in the United States, but the data behind the hype is what holds growers' attention. It is a indica-dominant (88% indica / 12% sativa) testing at roughly 18% THC, with a flowering window of 60-65 days under a 12/12 photoperiod. This guide pulls together the lineage, the effects, the grow data, and the practical answer to "where can I buy Rockstar Kush seeds in the USA" in one place.
Rockstar Kush Quick Stats
THC
18%
Indica
88%
Sativa
12%
Autoflower
No
Flowering
60-65 days
Difficulty
intermediate
Indoor Yield
up to 400 g/m2
Outdoor Yield
up to 450 g/plant
Plant Height
70–110 cm
Rockstar KushEffects & Experience
Reported effects center on relaxed, sleepy, happy. Rockstar Kush pulls toward physical relaxation and a quiet, observational headspace, a profile that holds up across phenotypes when the seeds are grown to their potential.
Growing Rockstar Kush
Growing Rockstar Kush fits shorter outdoor seasons, Pacific Northwest, New England, Great Lakes, where 7-9 week flowering finishes ahead of October rains. Rockstar Kush 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 up to 400 g/m2 under quality LED, and outdoor plants given full sun and 5-7 gallon containers reliably produce up to 450 g/plant. Expected plant height is 70–110 cm, with intermediate cultivation difficulty. Practical tips that move the needle: maintain canopy airflow with an oscillating fan moving air through the leaves, not just above them, to prevent powdery mildew; and defoliate strategically on day 21 of flower; remove fan leaves blocking interior bud sites without stripping the plant. The most common challenge growers report is calcium and magnesium supplementation under bright LED lighting; cal-mag at 2-3 mL/gal from week 2 prevents the most common deficiency.
Rockstar KushLineage & Genetics
Rockstar Kush is offered in the Royal King Seeds catalog. Read the description on this page as a general profile rather than a guarantee of your specific pack; expect some phenotype variation between packs.
Where to Buy Rockstar Kush Seeds in the USA
Rockstar Kush seeds ship from Royal King Seeds from within the United States. Estimated delivery is approximately 5-7 business days; actual timing varies by destination and carrier.
Rockstar Kush FAQ
Is Rockstar Kush indica or sativa?+
Rockstar Kush is a indica-dominant with a 88% indica / 12% sativa split. The effects lean toward physical relaxation and a calm, settled headspace.
How long does Rockstar Kush take to flower?+
Rockstar Kush flowers in 60-65 days 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 Rockstar Kush?+
Rockstar Kush tests at approximately 18% 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 Rockstar Kush good for beginner growers?+
Rockstar Kush 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 Rockstar Kush seeds in the USA?+
Royal King Seeds ships Rockstar Kush seeds from within the United States, with estimated delivery in approximately 5-7 business days. The product page is at https://royalkingseeds.us/rockstar-kush-feminized.