Purple ArrowStrain, Effects, Genetics, Grow Guide & Where to Buy
Purple Arrow earned its place in the modern cannabis canon for a reason , and the genetics live up to the reputation. It is a indica-dominant (79% indica / 21% sativa) testing at roughly 21% THC, with a flowering window of 50-60 days as an autoflower. 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 Purple Arrow seeds delivered anywhere in the US.
Purple Arrow Quick Stats
THC
21%
Indica
79%
Sativa
21%
Autoflower
Yes
Flowering
50-60 days
Difficulty
intermediate
Indoor Yield
up to 300 g/m2
Outdoor Yield
up to 300 g/plant
Plant Height
70–110 cm
Purple ArrowEffects & Experience
Reported effects center on creative, calm. Purple Arrow 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 Purple Arrow
Growing Purple Arrow fits cooler climates where photoperiod strains struggle to finish before frost, autoflower timing is calendar-driven, not daylight-driven. Purple Arrow 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 up to 300 g/m2 under quality LED, and outdoor plants given full sun and 5-7 gallon containers reliably produce up to 300 g/plant. Expected plant height is 70–110 cm, with intermediate cultivation difficulty. Practical tips that move the needle: defoliate strategically on day 21 of flower; remove fan leaves blocking interior bud sites without stripping the plant; 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 late-flower humidity if your indoor RH climbs above 55% during the final two weeks.
Purple ArrowLineage & Genetics
This cultivar is part of the Royal King Seeds curated catalog. Read the description as a general profile rather than a guarantee of your specific pack.
Where to Buy Purple Arrow Seeds in the USA
Purple Arrow 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.
Purple Arrow FAQ
Is Purple Arrow indica or sativa?+
Purple Arrow is a indica-dominant with a 79% indica / 21% sativa split. The effects lean toward physical relaxation and a calm, settled headspace.
How long does Purple Arrow take to flower?+
Purple Arrow flowers in 50-60 days from seed, since autoflower genetics ignore light cycle. Outdoor harvest typically lands 70-90 days after planting.
What is the THC content of Purple Arrow?+
Purple Arrow tests at approximately 21% 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 Purple Arrow good for beginner growers?+
Purple Arrow 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 Purple Arrow seeds in the USA?+
Royal King Seeds ships Purple Arrow seeds from within the United States, with estimated delivery in approximately 5-7 business days. The product page is at https://royalkingseeds.us/purple-arrow-auto.