UnderDawg OG by TH Seeds

UnderDawg OG strain photo
Type indica/sativaFlower ±63 daysCross Underdawg OG

1 other breeder's version of UnderDawg OG — compare flowering times side by side →

If you bring up UnderDawg OG in a circle of veteran growers, you're guaranteed to start a heated debate. The name itself is pure legend, heavily tied to the famous Loompa's Headband cut that clone-hoarders would trade their left arm for. So when T.H. Seeds released their seed version of UnderDawg OG, claiming it was a cross of OG Kush and Sour Diesel, the forums blew up. The old heads on THCFarmer were quick to point out that it wasn't the actual elite Loompa cut in seed form. But controversy aside, what T.H. Seeds actually put in those packs turned out to be an absolute workhorse of a Kush/Diesel hybrid that earned its keep in the grow room.

In the tent, this strain grows exactly like a classic OG, but with a bit more vigor. It stretches hard—expect it to double in size when you flip to flower—so topping and aggressive LST are a must unless you want your colas burning on the grow lights. The internodal spacing is tight, and it stacks up these massive, rock-hard golf balls of frost. The terp profile is a loud, aggressive mix of burning rubber diesel, sharp lemon cleaner, and that sweet, earthy pine funk that lets you know there's real Kush in the lineage. If you veg it out in a big pot, it can pull down monster yields, with some outdoor guys reporting well over a kilo per plant.

When you cure it up and finally roll a joint, the effects hit exactly like a proper hybrid should. You get an immediate, rushing head high from the Sour Diesel side that wakes you up, followed closely by a creeping, heavy body stone from the OG Kush that melts away joint pain. It might not be the sacred clone-only cut that started the myth, but T.H. Seeds' UnderDawg OG stands on its own two feet as a heavy-hitting, commercially viable yielder that still brings that connoisseur-grade flavor to the stash jar.

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BreederTH Seeds
Typeindica/sativa
Flowering time±63 days
EnvironmentOutdoors, Greenhouse
LineageUnderdawg OG
DescendantsGage Green Genetics - Last Tango, Underdog OG, Talisman, Bean Boyz Genetics - Double Dawg Down OG Kush, Grape Stomper x OG, Joseph, Monarch, Candy Drop, Underdawg Cake, UnderDawg OG

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🧬 Explore the family: Underdawg OG · Gage Green Genetics - Last Tango · Underdog OG · Talisman · Bean Boyz Genetics - Double Dawg Down OG Kush · Grape Stomper x OG · Joseph · Monarch · Candy Drop

Ancestry Pedigree

Underdawg OG
Clone Only Strains
OG Kush
Clone Only Strains
Thailand Sativa
Original Strains
Chem Dawg
Unknown or Legendary
Indica
Original Strains
Sour Diesel
Unknown or Legendary
Original Diesel
Unknown or Legendary
MassSuperSkunk
Unknown or Legendary
Super Skunk
Sensi Seeds
Skunk Nr1
Sensi Seeds
Skunk Nr1
The Seed Bank
Skunk Nr1
Cultivators Choice
Afghanistan Indica
Original Strains
Mexico Sativa
Original Strains
Colombia Sativa
Original Strains
Afghanistan Indica
Original Strains
Chem Dawg
Unknown or Legendary
DNL
Unknown or Legendary
RFK
Unknown or Legendary
Skunk
Unknown or Legendary
Skunk Nr1
Cultivators Choice
Northern Lights
Unknown or Legendary

Growing UnderDawg OG: what to expect

As an indica-leaning plant, expect a modest stretch after the flip (roughly 50–100%) and dense bud structure — which makes late-flower humidity discipline the main risk: keep RH in the 40s once buds fatten to stay ahead of mold. Growers familiar with Underdawg OG will recognize much of its behavior. Whatever the listing says, the cut in YOUR tent is the ground truth: log feedings, readings, and photos, and let the trends — not the label — drive decisions.

UnderDawg OG FAQ

How long does UnderDawg OG take to flower?

UnderDawg OG typically flowers in around 63 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.

Is UnderDawg OG an indica or a sativa?

UnderDawg OG is listed as indica/sativa.

What are the parents of UnderDawg OG?

UnderDawg OG was bred from Underdawg OG by TH Seeds.

What environment does UnderDawg OG like?

Standard cannabis bands work well: VPD 0.8–1.1 kPa in veg and 1.0–1.4 kPa in flower, with humidity stepping down from 65–75% as a seedling to 40–50% in late flower. See the stage-by-stage table on this page.

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Published by Cultivar (logmygrow.com), a structured grow journal. These reference bands are the same ones the app grades real grows against. Free to cite with a link. Some outbound product links are affiliate links — see disclosures.