A-TrainStrain, Effects, Genetics, Grow Guide & Where to Buy
A-Train 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 8-10 weeks from seed 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 A-Train seeds delivered anywhere in the US.
A-Train Quick Stats
THC
21%
Indica
79%
Sativa
21%
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
A-TrainEffects & Experience
Reported effects center on relaxed, sleepy, happy. A-Train 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 A-Train
Growing A-Train fits guerrilla growers and balcony cultivators across all 50 states, since the plant ignores light cycle and finishes before fall rains arrive. A-Train 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: feed cal-mag from week 2 onward at 2-3 mL per gallon, most reverse-osmosis and soft tap water setups need it; 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.
A-TrainLineage & 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 A-Train Seeds in the USA
A-Train 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.
A-Train FAQ
Is A-Train indica or sativa?+
A-Train 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 A-Train take to flower?+
A-Train 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 A-Train?+
A-Train 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 A-Train good for beginner growers?+
A-Train 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 A-Train seeds in the USA?+
Royal King Seeds ships A-Train 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/a-train-auto, checkout accepts standard cards, Apple Pay, and crypto.