Old School OGStrain, Effects, Genetics, Grow Guide & Where to Buy
Among the strains American growers consistently come back to, Old School OG sits near the top of the list, but the data behind the hype is what holds growers' attention. It is a indica-dominant (76% indica / 24% sativa) testing at roughly 20% THC, with a flowering window of 55-65 days as an autoflower. On this page we cover the effects, the lineage, the grow profile, and where to buy Old School OG seeds in the United States.
Old School OG Quick Stats
THC
20%
Indica
76%
Sativa
24%
Autoflower
Yes
Flowering
55-65 days
Difficulty
intermediate
Indoor Yield
up to 300 g/m2
Outdoor Yield
up to 450 g/plant
Plant Height
Short
Old School OGEffects & Experience
Old School OG is best known for relaxed, sleepy, happy. The effects come on within the first 10 minutes and settle into a stable plateau that lasts 90 minutes to two hours at typical doses. Growers and users consistently note that the high stays true to its profile rather than drifting, what you feel in the first 20 minutes is what you have for the next 90.
Growing Old School OG
Growing Old School OG fits guerrilla growers and balcony cultivators, since the plant ignores light cycle and finishes before fall rains arrive. Old School OG 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 450 g/plant. Expected plant height is Short, 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 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 calcium and magnesium supplementation under bright LED lighting; cal-mag at 2-3 mL/gal from week 2 prevents the most common deficiency.
Old School OGLineage & Genetics
Old School 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 Old School OG Seeds in the USA
Old School 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.
Old School OG FAQ
Is Old School OG indica or sativa?+
Old School OG is a indica-dominant with a 76% indica / 24% sativa split. The effects lean toward physical relaxation and a calm, settled headspace.
How long does Old School OG take to flower?+
Old School OG flowers in 55-65 days from seed, since autoflower genetics ignore light cycle. Outdoor harvest typically lands 70-90 days after planting.
What is the THC content of Old School OG?+
Old School OG tests at approximately 20% 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 Old School OG good for beginner growers?+
Old School OG 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 Old School OG seeds in the USA?+
Royal King Seeds ships Old School OG seeds from within the United States, with estimated delivery in approximately 5-7 business days. The product page is at https://royalkingseeds.us/old-school-og-auto.