Extreme OGStrain, Effects, Genetics, Grow Guide & Where to Buy
Extreme OG 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 (70% indica / 30% sativa) testing at roughly 27% THC, with a flowering window of 55-65 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 Extreme OG seeds in the USA" in one place.
Extreme OG Quick Stats
THC
27%
Indica
70%
Sativa
30%
Autoflower
No
Flowering
55-65 days
Difficulty
intermediate
Indoor Yield
up to 350 g/m2
Outdoor Yield
up to 400 g/plant
Plant Height
Short
Extreme OGEffects & Experience
The dominant effects of Extreme OG are relaxed, sleepy, 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 Extreme OG
Growing Extreme OG fits shorter outdoor seasons, Pacific Northwest, New England, Great Lakes, where 7-9 week flowering finishes ahead of October rains. Extreme OG 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 350 g/m2 under quality LED, and outdoor plants given full sun and 5-7 gallon containers reliably produce up to 400 g/plant. Expected plant height is Short, 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 top once at the 4th node to encourage 4-6 even main colas instead of one dominant cola. 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.
Extreme OGLineage & Genetics
Extreme OG 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 Extreme OG Seeds in the USA
Extreme OG 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.
Extreme OG FAQ
Is Extreme OG indica or sativa?+
Extreme OG is a indica-dominant with a 70% indica / 30% sativa split. The effects lean toward physical relaxation and a calm, settled headspace.
How long does Extreme OG take to flower?+
Extreme OG flowers in 55-65 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 Extreme OG?+
Extreme OG tests at approximately 27% 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 Extreme OG good for beginner growers?+
Extreme OG 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 Extreme OG seeds in the USA?+
Royal King Seeds ships Extreme OG seeds from within the United States, with estimated delivery in approximately 5-7 business days. The product page is at https://royalkingseeds.us/extreme-og-feminized.