A-10 Strain — Effects, Genetics, Grow Guide & Where to Buy
Among the strains American growers consistently come back to, A-10 sits near the top of the list, with a profile that holds up under scrutiny. It is a indica-dominant (70% indica / 20% sativa) testing at roughly 18-22% THC, with a flowering window of 8-10 weeks under a 12/12 photoperiod. On this page we cover the effects, the lineage, the grow profile, and where to buy A-10 seeds in the United States with discreet shipping and a 95% germination guarantee.
A-10 Quick Stats
THC
18-22%
Indica
70%
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
A-10 Effects & Experience
The dominant effects of A-10 are creative, relaxed, happy, 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 A-10
Growing A-10 fits shorter outdoor seasons — Pacific Northwest, New England, Great Lakes — where 7-9 week flowering finishes ahead of October rains. A-10 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: flush nutrients in the final 10-14 days for cleaner flavor; trichomes finish properly even on plain pH-adjusted water; and feed cal-mag from week 2 onward at 2-3 mL per gallon — most reverse-osmosis and soft tap water setups need it. The most common challenge growers report is over-feeding nitrogen past week 1 of flower — switch to bloom nutrients within 7 days of seeing pistils.
A-10 Lineage & Genetics
A-10 is a Royal King Genetics in-house cross. The parental selection was chosen for compact stature and resin density, then stabilized over multiple generations to lock in phenotype expression. Seeds run true to the description on this page rather than spreading across a wide range of expressions.
Where to Buy A-10 Seeds in the USA
A-10 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-10 FAQ
Is A-10 indica or sativa?+
A-10 is a indica-dominant with a 70% indica / 20% sativa split. The effects lean toward physical relaxation and a calm, settled headspace.
How long does A-10 take to flower?+
A-10 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 A-10?+
A-10 tests at approximately 18-22% 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 A-10 good for beginner growers?+
A-10 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 A-10 seeds in the USA?+
Royal King Seeds ships A-10 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-10-feminized — checkout accepts standard cards, Apple Pay, and crypto.