100% success rate with these seeds, and a great strain! I tried some seeds from another distributor, and they were all duds. Had a few of these left over, from a few years ago and they grew long tap roots in one day! Very happy with the quality of seeds at the seed pharm.
Austin, on Pineapple Express Feminized Seeds, November 2025
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Autoflower · Chemdawg x Pre-98 Bubba Kush
303 OG Autoflower Seeds
303 OG Auto takes its name from Colorado's 303 area code and its genetics from Chemdawg and Pre-98 Bubba Kush. The result smells of chem and fuel over coffee, earth and pine, and it stays short, 60-100 cm, which makes it a good fit for a closet, a small tent or a hidden corner of the garden.
- Autoflower seeds
- Chemdawg x Pre-98 Bubba Kush, indica-dominant
- 26% THC, short plants (60-100 cm)
$45 away from 10 free seeds and free shipping.
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303 OG is named for Colorado's 303 area code, and it is built from two lines with deep roots in American cannabis: Chemdawg and Pre-98 Bubba Kush. Chemdawg brings the sharp chem and fuel smell. Pre-98 Bubba Kush brings a squat, heavy indica frame and a darker, earthy smell with hints of coffee. On the strain label it is indica-dominant, roughly 80% indica, and THC reads 26%.
This listing is an autoflower: it blooms as it matures, with no light change needed.
Small plant, loud smell
The label lists 303 OG Auto as short, 60-100 cm, so it fits places a photoperiod plant would outgrow. That size is deceptive, though. The chem side is pungent, and late in flower the smell carries well beyond the grow space. Indoors, fit a carbon filter before the plants start to bloom. Outdoors, give it a spot away from shared fences.
Strain label
303 OG Autoflower Seeds · The Seed Pharm- Seed type
- Autoflower Seeds
- Lineage
- Chemdawg x Pre-98 Bubba Kush
- Indica / sativa
- Indica-dominant (~80% Indica)
- THC
- 26% THC
- Flowering time
- 8-10 weeks
- Height
- Short (60-100 cm)
- Outdoor yield
- 350 g per plant
- Grows
- Indoor/Outdoor
How to grow 303 OG Auto
Start the seed in its final container and leave it there. A short autoflower has little time to recover from transplanting or heavy pruning, so skip topping and use gentle tie-downs in the first weeks to spread the branches instead.
Feed lightly in the early weeks and build up through flower. Bubba-type plants pack their buds tight, so keep a fan moving across the canopy and avoid letting humidity climb late in bloom. Flowering on the label runs 8-10 weeks.
In a sunny spot outdoors, a single plant can reach 350 g. Because it stays small, several plants fit where one large photoperiod would go.
Read next: Autoflower outdoor growing · How to germinate seeds · Prairie guide
303 OG Auto pack prices
| Pack | Price | Per seed | You save | Bonus seeds | Shipping |
|---|---|---|---|---|---|
| 3 seeds | $39 | $13.00 | Base price | None | $10 |
| 5 seeds | $55 | $11.00 | $10 (15%) | None | $10 |
| 10 seeds | $105 | $10.50 | $25 (19%) | 10 free | Free |
| 20 seeds | $180 | $9.00 | $80 (31%) | 10 free | Free |
Prices in USD. Savings are against the 3-seed price per seed. Bonus seeds are added at checkout once your whole order passes $100, and 20 once it passes $200.
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303 OG Autoflower Seeds
303 OG Auto takes its name from Colorado's 303 area code and its genetics from Chemdawg and Pre-98 Bubba Kush.
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Named for Denver's 303 area code, this Chemdawg and Pre-98 Bubba Kush cross smells of fuel, coffee and spice.
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501st OG Autoflower Seeds
Sweet grape in the jar, earth and pine once it is broken up.
From $39303 OG Auto questions
Where does the name 303 OG come from?
From 303, the telephone area code for Denver and the surrounding part of Colorado.
What is 303 OG Auto crossed from?
Chemdawg and Pre-98 Bubba Kush, with autoflowering genetics bred in. The label lists it as about 80% indica.
How tall does 303 OG Auto grow?
Short. The strain label lists 60-100 cm, which suits closets, small tents and balconies.
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