Hybrid · Top Dawg Seeds
Chemdawg
Chemdawg, sometimes spelled Chemdog, traces back to a 1991 Grateful Dead show parking lot where breeder Wonkanobe bought a bag of seeds that produced the original Chemdawg phenotypes, later stabilized as Chemdog '91, '95, and Chemdog D by JJ-NYC and Top Dawg Seeds. The strain became the foundational parent of nearly the entire modern OG and Diesel family — Sour Diesel, OG Kush, Headband, and Stardawg all trace back to Chemdawg cuts. The flavor is sharp diesel fuel on the inhale with a pine-citrus undertone, and plants finish in nine to ten weeks indoors with medium-dense buds and a fuel-forward terpene profile that holds up through long cures. The high is balanced cerebral-physical with a strong, fast onset.
Reviewed 2026-05-23· Sources: seedfinder.eu, Top Dawg Seeds catalogue, JJ-NYC interviews
Potency
- THC range
- 18–25%
- Typical THC
- 22%
- CBD
- up to 0.1%
Flowering
- Indoor weeks
- 9–10 wk
- Difficulty
- Moderate
- Climate
- Mediterranean, warm dry
Yield & size
- Indoor
- 450-550 g/m²
- Outdoor
- 500-700 g/plant
- Height
- 120-150 cm
Indica / sativa ratio
Terpene profile
The aromatic compounds below shape how Chemdawg smells, tastes, and ultimately feels in the body.
- dominant
Caryophyllene
Peppery and spicy — the only terpene that binds CB2 receptors, studied for anti-inflammatory action.
- secondary
Limonene
Uplifting citrus — typically associated with mood elevation and stress relief.
- secondary
Myrcene
Sedating, musky, herbal — commonly linked to couch-lock effects.
- minor
Pinene
Alert and pine-forward — associated with mental clarity and bronchodilation.
Reported side effects
Lineage
Chemdawg traces to Nepalese × Thai. The cross sits in the Chem / Diesel family, which influences both the terpene profile and the flowering structure described above.
Genetic family tree
Documented parents for Chemdawg based on breeder catalogues. Library entries are clickable; ancestors not yet documented on this site appear in a lighter, non-linked box.
Strains crossed with Chemdawg
Chemdawg is a parent of 5 strains in the broader catalogue. These are crosses that carry Chemdawg genetics on at least one side of the cross.
Grow profile
Grow profile
- Indica / sativa
- 45% / 55%
- Flowering days
- 63–70 days
- Stretch
- High
- Pest resistance
- Moderate
- Mold resistance
- Moderate
- Training methods
- topping, scrog, supercropping
Feed schedule for Chemdawg
These EC and NPK targets are starting points calibrated for the strain's Hybrid lean and moderate difficulty rating — not gospel. Drop 15-20% off any EC ceiling on your first run and let the plant tell you where it actually wants to feed.
Suggested feed schedule
- Late veg
- 1.3-1.5 EC
- Early flower
- 1.4-1.6 EC, NPK 2-2-4
- Mid flower
- 1.7-1.9 EC, NPK 1-3-5
- Late flower
- 1.5-1.7 EC
- Final week
- Plain pH-balanced water for the last 7-10 days; light flush if you ran nutrients on the higher end.
Full breakdown of feed math, runoff testing, and salt buildup in our nutrient guide.
What to expect through the grow cycle
Chemdawg is documented with a 10-week flower split across the standard hybrid phases. The visual below maps a documented 14-week cycle built from 4weeks of vegetative growth and the strain's published flowering window.
Published grow reports for Chemdawg concentrate the most observational notes on the mid-to-late flower transition. This timeline is descriptive — it reflects what reports document, not a how-to. Actual week-to-week behaviour varies with phenotype, light intensity, pot size, and environment.
Phase details
- Veg (weeks 1-4)
- The documented vegetative period for Chemdawg. Plants establish root structure, leaf canopy, and node count before flower triggering, with a moderate difficulty rating shaping how forgiving the early canopy work tends to be.
- Stretch (weeks 5-8)
- Chemdawg is documented as having high stretch. Reports describe the plant roughly doubling in height during this phase as the hybrid structure establishes its final flowering frame.
- Bud sites (weeks 9-10)
- Pre-flowers form at the nodes and calyxes begin to develop. Grow reports for Chemdawgnote this as the window where the canopy's eventual bud distribution becomes visible.
- Bud development (weeks 11-12)
- Flowers thicken and calyxes fatten through this phase. Documented Chemdawg runs show the bulk of visible flower mass accumulating here, with resin production accelerating toward the end.
- Ripening (week 13)
- Trichomes transition from clear toward cloudy and amber. Reports for Chemdawg describe the Caryophyllene-led terpene profile maturing through this window, with aroma sharpening week over week.
- Final (week 14)
- Calyx swelling is documented as complete and the harvest window opens. Published Chemdawg runs end here, within the 9-10 week flowering range reported by the breeder.
Flavor & aroma
Reported effects
Common questions about Chemdawg
Is the Chemdawg origin story really a parking lot?
The widely accepted origin is that Wonkanobe purchased a bag of seeds at a 1991 Grateful Dead concert in Indiana from a grower nicknamed 'Joe Brand.' JJ-NYC and Top Dawg later stabilized the resulting phenotypes as the commercial Chemdog '91 and '95 lines.
Why is Chemdawg the parent of so many modern strains?
The fuel-diesel terpene profile and high-THC sativa expression made Chemdawg one of the most useful pollen donors of the 1990s and 2000s. Sour Diesel, OG Kush, Stardawg, and Headband all carry a Chemdawg parent or grandparent.
Breeder of record
Top Dawg Seeds
View breeder profile and other strains →
More from Top Dawg Seeds
Strains similar to Chemdawg
These picks lean on the same terpene profile and parent genetics as Chemdawg — shared dominant terps, overlapping lineage, and matching indica/sativa lean. No star ratings or popularity contests, just overlap on the traits that actually drive a similar grow and smoke.