Original Auto OG Kush

Original Auto OG Kush Cannabis Seeds by FastBuds

Original Auto OG Kush is an autoflowering feminised cannabis seed from FastBuds that packs 23% THC into a compact, fast-finishing plant ready to harvest in just 63 days from seed. Built on legendary US West Coast OG Kush genetics crossed with ruderalis, this is FastBuds' most potent strain in their Original Auto line — and one of the strongest autoflowers you can grow, full stop.

Why Original Auto OG Kush Seeds Stand Out

There are dozens of autoflowering OG Kush seeds floating around. Most of them sacrifice potency for speed — you get the convenience of an auto lifecycle but end up with a watered-down version of the original. FastBuds went the other direction with this one. At 23% THC, the Original Auto OG Kush sits right at the ceiling of what autoflowers can deliver. That's photoperiod-grade potency in a plant that doesn't need light schedule changes.

The genetics trace back to the real OG Kush — the same West Coast cut that built reputations in California dispensaries throughout the 2000s. FastBuds stabilised the autoflowering trait through their ruderalis cross while keeping the terpene profile and potency intact. The result is a plant that genuinely smells, tastes, and hits like OG Kush. Pine and citrus up front, earthy and pungent underneath, with a diesel edge on the exhale. The smoke is dense but creamy-smooth — none of that harsh, throat-scratching harshness you sometimes get from rushed auto genetics.

The one honest limitation: she's a heavy feeder. Those indica roots mean she wants proper nutrition throughout her lifecycle, especially during the transition into flowering. Skimp on nutrients and you'll see it in the final product. But if you keep her fed, she's genuinely low maintenance in every other respect.

Growing Original Auto OG Kush: What to Expect

This strain finishes in roughly 63 days from germination to harvest. That's just over nine weeks for a plant capable of producing up to 550g/m2 indoors. For an autoflower, those numbers are serious.

She grows to a medium-tall height of 70–110cm, which means she fits comfortably in most grow tents — even a 60x60 if you're tight on space, though we'd pick an 80x80 for better airflow around those dense indica buds. Outdoors, she adapts well to varied climates. The OG Kush lineage comes from California, so she handles warm days without complaint, but the ruderalis genetics also give her resilience against cooler nights. Not a tropical-only plant by any stretch.

One thing we've seen growers underestimate with this strain: the feeding schedule. FastBuds recommends gradually increasing nutrient doses through the vegetative stage and hitting full-strength grow nutrients by the final week before pre-flowering. From there, switch to bloom nutrients and maintain generous feeding. She'll reward the effort.

Aroma, Flavour, and Effect Profile of OG Kush Auto

The terpene profile on this one is classic OG Kush — and that's not something you can say about every auto version. Crack open a cured bud and you get that unmistakable pine-and-citrus punch, layered over deep, pungent earthy tones. It fills a room. The flavour follows through: citrus notes dominate the inhale, with subtle diesel overtones emerging on the exhale. The smoke itself is thick but remarkably smooth — a creamy quality that makes it easy to take bigger pulls than you probably should.

The effect is heavily indica-leaning. Expect a deep, full-body relaxation that builds steadily and sticks around for hours. Smoke a bit more and she'll push you firmly into couch-lock territory. This is an evening strain, no question. Not the one you reach for before a hike or a social event — more the one you reach for when the day is done and you want it to stay done.

At 23% THC, respect the potency. If you're newer to strong indica effects, start with a small amount and give it time to settle in before going back for more.

Original Auto OG Kush vs Other Autoflowering Strains

How does she compare to other popular autos in the FastBuds catalogue? Here's a quick side-by-side with two other strains we carry:

If raw potency is your priority, Gorilla Cookies Auto edges ahead at 27% THC. But if you specifically want that old-school OG Kush flavour profile — the pine, the diesel, the earthy depth — Original Auto OG Kush is the one. It's a different experience entirely. Purple Lemonade Auto is the pick if you want something lighter and more fruit-forward. All three finish in a similar timeframe, so it comes down to what you want to smoke.

How to Grow Original Auto OG Kush Seeds

1. Germinate your seeds using the paper towel method or directly in a small pot of moist, aerated soil. Autoflowers don't love transplanting, so starting in the final container (7–11 litres) saves stress.
2. Provide 18–20 hours of light per day from seed to harvest. Autoflowers don't require a light cycle change, which is one of the key advantages over photoperiod strains.
3. Begin with a light nutrient feed during the seedling stage. Gradually increase the dose through vegetative growth, reaching full-strength grow nutrients by the end of week 2–3.
4. Watch for the pre-flowering stretch around week 3–4. Switch to bloom nutrients at this point and maintain generous feeding — this is where her indica appetite really kicks in.
5. Maintain temperatures between 20–28C and relative humidity around 40–50% during flowering. Good airflow around the canopy prevents mould in those dense buds.
6. Harvest around day 63 when trichomes shift from clear to milky-white with some amber. For a heavier, more sedative effect, wait until you see more amber trichomes before cutting.

Frequently Asked Questions

Last updated: April 2026