White Sour
$35.00
White Sour, first full — a regular-seed cross of Loompa’s Headband (Underdawg OG) to a Stardawg male from the same batch as Top Dawg’s Kate Upton release. Regular seeds. 63-day flower. Medium yield. Intermediate difficulty. Pre-Cookies gas with a cooling OG finish — every pheno comes back glassed in white trichomes.
Born-on Date: January 2026
White Sour
×
Stardawg (Kate Upton batch)
Pre-Cookies gas. Vintage OG bones. White frost on every single pheno.
Fully Tested
63-Day Flower
Medium Yield
Intermediate
— Greenpoint Seeds, on the inaugural release
The DNA, decomposed
Two clone-only legends collapsed into a regular-seed F1. Tier the heritage out and you get the breeding thesis at a glance — half vintage OG, half Top Dawg chem with an Afghan chassis underneath.
Two clone-only legends. One regular-seed pack.
Loompa’s Headband
aka Underdawg OG · clone-only
Preserved by Loompa Farms, Northern California
Stardawg (Kate Upton batch)
Chem 4 × Tres Dawg
JJ NYC / Top Dawg Seeds — 3rd release
Loompa’s Headband — Underdawg OG, the cut Loompa renamed
A vintage-era OG Kush expression preserved by Loompa Farms long before the term “OG Kush” was a brand.
“Headband” was never a single strain. It was an umbrella — a regional codename that traveled. By the early 2000s, an elite OG Kush cut had moved out of Southern California into the Bay Area and the Emerald Triangle, and Northern California growers renamed it for distance and for accuracy: a flower that produced a pronounced temple-squeeze sensation across the crown of the head within minutes of the inhale.
That umbrella eventually fractured into multiple regional Headbands — Mandelbrot’s 707 out of Mendocino, the East Coast Daywrecker / Underdog Diesel running the I-95 lane, and the Loompa Farms cut sitting quietly in the Northern California vault. Loompa’s was the OG-leaning expression: tall, golf-ball nugs running up the stem, lemon-pine-fuel nose, and that signature cooling finish on the exhale that nothing else in the gas lane has ever fully replicated.
Loompa eventually re-christened his cut Underdawg OG to separate it from the East Coast Headbands tied to the Chem and Diesel lanes. The cut has stayed clone-only ever since. Reversing it for feminized work is a legendary headache — the pollen runs notoriously sterile, which is why almost every “Underdawg” seed line on the market is something else with the name slapped on.
This is the real one. Used here as a mother because the only way through the sterility wall is regular-seed work with an open male.
What Loompa’s Headband does in the room
Aggressive 1.5–2× stretch in the first three weeks of 12/12. Strong apical dominance, heavy lateral branching, golf-ball calyx clusters that run vertically up the stem rather than forming a single spear. The structural complaint is real — without trellis and topping, the centers crowd, lower bud larfs out, and the side branches snap under late flower weight. The trichome quality, though, is non-negotiable. Greasy, glassy, and stacked — and the cooling eucalyptol finish on the exhale survives every cut and every cure if you dry it slow.
Stardawg — Kate Upton batch, Top Dawg 3rd release
The structural anchor of the modern chem family, donating the Chem 4 nose and the Tres Dawg skeleton.
The Stardawg story doesn’t start in 2010 — it starts in 1991, in a parking lot at Deer Creek, where the original Chemdog seeds came out of a bag of “Dog Bud” and ended up as Chem 91, Chem Sis, and Chem D. JJ NYC at Top Dawg later acquired Chem D and recognized the line’s structural problem: legendary nose, devastating potency, but lanky vines, vast internodal gaps, and zero ability to hold its own weight.
The fix was Tres Dawg — Chem D crossed to Double Dawg, an Afghan-leaning male, then worked until the structure tightened up and the resin went glassy. Tres Dawg is the chassis under almost every modern chem hybrid worth growing. JJ then crossed Chem 4 to a Tres Dawg male and named the result Stardawg — a description, not a marketing line. The progeny were so encrusted in stalked trichomes the buds looked dipped in crushed glass.
Stardawg ran across multiple releases, each using a different Tres Dawg male to tease out a different expression. The 3rd release used the Purple Tres Dawg male — a dominant pop that threw violet phenotypes into almost everything it touched. The keeper from that drop is the cut the culture renamed Kate Upton: tall, structurally flawless, blanketed in resin, with a Chem 4 nose softened by dark fruit and grape on the back end.
The White Sour father comes from that same batch — same hunt, same male pool, same release. Used here for one reason: the Loompa mother needed a structural anchor and a resin amplifier, and nothing in the gas lane does both jobs better than a Top Dawg 3rd-release male.
What the Kate Upton-batch male brings to the cross
Internodal compression — drops the OG stretch from “trellis emergency” to manageable. Lateral branch thickness — the side arms hold their own weight without staking. Trichome amplification — the Chem 4 / Tres Dawg trichome density passes dominantly, and every White Sour pheno comes back blanketed in white. Recessive purple — about one in five offspring throws anthocyanin, but only in the foliage, never in the calyx.
The thesis behind the cross
Crossing two hyped names doesn’t make a champion. White Sour was built on three deliberate genetic complements — fix what the OG mom is missing, push what she does well, balance what the chem dad does too aggressively.
Structural Rectification
The Loompa mother is a finicky vine — wide internodes, thin lateral arms, late-flower collapse without aggressive trellis. The Stardawg father, via the Tres Dawg lineage, donates the Chem family chassis: tighter nodes, thicker side branches, self-supporting structure. The F1 carries the OG nose on a frame that doesn’t need to be tied to anything.
Hyper-Trichome & the OG Swoll
Loompa’s Headband makes greasy, glassy resin. Stardawg makes stalked, bulbous, naked-eye trichomes. Stack them and the foliage disappears — the buds literally read white in the jar. The cross also throws the classic OG swoll from week 7 forward: calyxes balloon, the calyx-to-leaf ratio cleans up, and the trim time collapses.
The Cooling Counter-Balance
Pure chem can fatigue the palate — the sour, burnt-rubber, halitosis funk is a flag for potency, but it can also turn into a chest-cough on the exhale. The Loompa mother’s signature eucalyptol-style cooling sits on the back of the throat and answers that aggression directly. The keeper pheno from this pack is the one where both register in the same hit.
The 80/20 split — what comes out of the pack
Regular seeds, F1. The expression splits into two visually distinct camps with predictable ratios. Both camps come back glassed in white trichomes — that’s universal across the line.
The OG Expression
Bright neon-green foliage, classic OG morphology — golf-ball calyx clusters running vertically up each stem, wiry orange pistils, the Loompa nose sitting up front. This is the bulk of the pack and where the keeper cuts most often hide. Look for the one that smells exactly like the Loompa mother but stacks side branches like the Stardawg father.
Purple Leaf, Green Calyx
Anthocyanin expression inherited from the Purple Tres Dawg male — but read this carefully: the purple sits in the fan leaves and sugar leaves only. The actual calyx stays bright, vibrant green. Dark violet exterior foliage wrapping neon-green swollen calyxes, the whole mess buried under opaque white frost. Top-shelf bag appeal, no question. Whether one of these is also the keeper depends on the nose.
What to look for through the hunt
Selection markers vs. cut criteria
| Veg | Thick, deeply ribbed stalks. Stem rub gives an immediate offensive odor — burnt rubber, pine, fuel. Cut anything thin or vine-like. |
| Days 1–21 flower | Stretch should plateau around 1.5×. Tight internodes, bud sites stacking close. Cut anything pushing past 2.5× or stringing out into long gaps. |
| Days 22–45 flower | Trichome production should be aggressive and early — resin creeping down the petioles by week 5. Purple expression starts under cooler night temps. Cut frost laggers. |
| Days 46–63 flower | This is where the keeper reveals itself. Calyxes blow out — the OG swoll. Trichomes cloud over, get tacky and greasy. Cut leafy phenos that don’t swell. |
| Final nose | Yuck-mouth sour and chem on the inhale. Eucalyptol / mint on the back of the throat on the exhale. If both register — that’s the keeper. |
Sour, chem, fuel — with a cold finish
Dominant myrcene and limonene with strong beta-caryophyllene support. Trace contributions from humulene, linalool, ocimene, and — in the keeper pheno — the eucalyptol-style cooling that defines vintage Loompa expression.
Smells and tastes exactly like the Loompa mother. Stretches, stacks, and yields like the Stardawg father. That’s the keeper. Everything else in the pack is feed for the pollen project.
The golden rule of this hunt
Run it like vintage OG, finish it like modern chem
Intermediate-level grow. The OG morphology demands trellis and topping; the chem density demands aggressive RH control through the back half.
The genealogy, decomposed
White Sour │ ├── Loompa's Headband (Underdawg OG · clone-only) │ └── Vintage OG Kush expression │ └── Preserved by Loompa Farms, Northern California │ └── Stardawg (Kate Upton batch · Top Dawg 3rd release) ├── Chem 4 │ └── Chemdog '91 lineage (Deer Creek bag seed) │ └── Tres Dawg (Purple Tres Dawg male) ├── Chem D │ └── Chemdog '91 lineage └── Double Dawg └── Afghan-leaning structural donor
First full release. Regular seeds. The pre-Cookies torch, lit.
White Sour from Greenpoint Seeds. Regular seeds — fully tested, fully verified across multiple cultivators. This is not a hyped polyhybrid built around a marketing angle. It’s a deliberate genetic rectification: the most respected vintage OG mother on the West Coast, crossed to a Stardawg male from the same batch that produced Top Dawg’s Kate Upton, run through F1 and proven to throw white frost across every single phenotype in the pack.
For the canopy manager willing to run a real hunt, the reward is the keeper — blindingly white, swollen, purple-fringed flowers that deliver instant temple-squeeze pressure relief, profound head-numbing sedation, and a palate-cooling finish that balances the most aggressive sour, chem, and OG funk this side of the I-95 corridor. This is not commercial mid built for mass appeal. This is the highest expression of old-school fire — engineered strictly for the culture.
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Stardawg (Kate Upton batch)
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White Sour
| Weight | 0.21 oz |
|---|---|
| Quantity | Full pack – 10 regular photoperiod seeds, Wholesale – 10 packs, Wholesale – 20 packs, Wholesale – bulk 1,000 seeds, Wholesale – bulk 100 seeds, Wholesale – bulk 500 seeds |
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1 review for White Sour
| 5 star | 100% | |
| 4 star | 0% | |
| 3 star | 0% | |
| 2 star | 0% | |
| 1 star | 0% |
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Was able to get some of these pks when they came out as testers. Very happy with the end product popped 8 all sprouted within 48hrs. 3 different noses one had a mint/vapor rub with strong OG on the back end another had a gasoline nose with the OG on the back end and the last was more of the OG lemon pledge smell all very frosty and resinous definitely will run it again soon
Was trying to upload more than one picture but couldn’t