Diamond Chem
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Diamond Chem is a regular cannabis seed cross of Chem D × Stardawg by Greenpoint Seeds. At 72% Chem D, this cross saturates the gene pool with the garlic matriarch’s sulfur alleles through both the direct mother and the Tres Dawg backcross in the Stardawg father. Kate Upton cut provides structural refinement and the purple recessive. Flowering time: 70 days. Format: Regular. Yield: High.
Harvested: November 2025
Diamond Chem is a regular cannabis seed cross of Chem D × Stardawg by Greenpoint Seeds. At 72% Chem D, this cross saturates the gene pool with the garlic matriarch’s sulfur alleles through both the direct mother and the Tres Dawg backcross in the Stardawg father. Kate Upton cut provides structural refinement and the purple recessive. Flowering time: 70 days. Format: Regular. Yield: High.
Greenpoint Seeds — Genetic Archive
Diamond Chem
Chem D
×
Stardawg
The sovereign of sulfur. A calculated backcross of the I-95 corridor’s most offensive genetics — Chem D alleles saturated through the structural chassis of the Kate Upton Stardawg cut. This is not candy. This is the Dog Bud, refined.
Chem D Dominant
High Yield
Regular Seeds
70-Day Flower
“When you smoke Diamond Chem, you aren’t just tasting gas — you are tasting thirty years of underground history. The Dog Bud never died. It just went dormant, waiting for someone to bring it back without watering it down.”
— Caesar THCzar / Greenpoint Seeds Genetic Archive
Genetic Arithmetic
Ancestral Saturation Map
Diamond Chem is not a poly-hybrid experiment — it is a calculated saturation of Chem D alleles through convergent lineage. At 72% Chem D, this is one of the most concentrated expressions of the garlic matriarch available in seed form.
Breeder’s Note
Because Stardawg is (Chem 4 × Tres Dawg) and Tres Dawg is a worked Chem D line (Chem Sis × Chem 4/Chem D bx2), the Chem D alleles stack from both sides of the cross — direct mother plus heavy backcross representation through the grandfather. At 72%, Diamond Chem is one of the most Chem D–saturated offerings in the Greenpoint catalog. The remaining genetics are Chem 4 for structure and yield, with a 3% whisper of Affy anchoring the foundation.
Lineage Architecture
Three Pillars of the I-95 Dynasty
Every major ancestor in this cross traces back to the thirteen seeds found in a Grateful Dead parking lot in 1991, with a 3% Affy trace anchoring the base.
Mother
Chem D
Seed #6 of 13 — germinated 2001
Greg “Chemdog” Krzanowski
Father
Stardawg
Chem 4 × Tres Dawg
JJ NYC / Top Dawg Seeds
Grandfather
Tres Dawg
Chem Sis × Chem 4/Chem D bx2
JJ NYC / Top Dawg Seeds
Foundation
Dog Bud
13 seeds — Deer Creek, 1991
72% Chem D / 25% Chem 4 / 3% Affy
Mother
Chem D — The Garlic Matriarch
Seed #6 of the original 13 Chemdog seeds. Germinated in 2001. Clone-only ever since.
The story of every gas-dominant variety on the modern market starts in the same place: Deer Creek Amphitheatre, Noblesville, Indiana, June 1991. A seventeen-year-old Greg Krzanowski paid $500 for an ounce of something called “Dog Bud” — flower so volatile and chemical-soaked that the name alone told you what you needed to know. That ounce contained 13 seeds. Those thirteen genetic blueprints built the entire sulfur market, from Sour Diesel to OG Kush to the strain sitting in your cart right now.
The Chem D — germinated a full decade later in 2001 — is the most potent and offensive expression of those original genetics. While the ’91 cut established the Chemdog name with its pine-fuel-earth signature, the D introduced a profile so raw that breeders describe it as garlic, onion, halitosis, and something approaching rotten meat. This is not terpene-driven aroma in the traditional sense. The Chem D’s stench is fueled by volatile sulfur compounds (VSCs) — the same chemical class responsible for skunk spray. These molecules operate at parts-per-billion detection thresholds. They go through plastic jars. They defeat carbon filters. They announce themselves whether you want them to or not.
Morphologically, the Chem D is a grower’s paradox. The potency is generational — 25 to 30%+ THC with narcotic, behind-the-eyes sedation — but the structure is a nightmare. Floppy, vine-like stems that collapse under their own weight without aggressive trellising. The authentic clone carries a variegation mutation: yellow or white streaking on the leaves that looks like a nutrient deficiency or TMV infection to the uninitiated. To the genealogist, this is the mark of the beast — the phenotypic fingerprint confirming you are holding the real Chem D genetics. In Diamond Chem offspring, the presence of this variegation is your compass pointing toward the most mother-dominant keepers.
Variegation — The Mark of the Beast
Yellow or white leaf streaking in your Diamond Chem seedlings is not a deficiency. It is the Chem D mother expressing her heaviest alleles. Plants showing this mutation are the most likely to carry the full offensive sulfur profile and narcotic potency ceiling. Do not cull them.
Chemdog Phenotype Comparison
| Trait | Chem ’91 | Chem #4 | Chem D |
|---|---|---|---|
| Aroma | Pine / Fuel / Earth | Lemon-Cleaner / Pine | Garlic / Onion / Meat / Gas |
| Structure | Lanky, sprawling | Dense, high yield | Floppy, vine-like |
| THC Range | 20–22% | 22–24% | 25–30%+ |
| Leaf Pattern | Dark green | Lime green | Variegated (yellow streaking) |
| Flower Time | 63–70 days | 65–70 days | 70–77 days |
Historical Record
The 13 Seeds — Germination Timeline
Every modern gas variety traces its ancestry to thirteen seeds discovered in an ounce of Dog Bud purchased at a Grateful Dead show. Here is the historical record of how those seeds were popped — and what they became.
1991 — Seed #1
Chem ’91 (Original). Foundation of East Coast Sour Diesel and OG Kush lineages.
1991 — Seed #4
Male. Discarded by a young Greg. The “lost” male of the dynasty — its genetics gone forever.
1992–94 — Seeds #2, #3
Chem’s Sister (Chem A) and Chem B. The Sister became a parent of Gorilla Glue #4.
2001 — Seeds #5, #6
Chem C (discarded as mediocre) and Chem D — the garlic matriarch. The most potent expression of the Dog Bud genetics. Mother of Diamond Chem.
2006 — Seeds #8–11
Chem #4 selections by Joe Brand. Known for lemon-cleaner terpenes and high yield. Father-side ancestor of Stardawg.
Remaining — Seeds #7, #12, #13
Seed #7 failed to germinate. Seeds #12 and #13 remain unpopped — held in the vault of history.
Father
Stardawg — The Kate Upton Cut
Chem 4 × Tres Dawg. Bred by JJ NYC of Top Dawg Seeds. 3rd Release (“Purple Release”) selection.
If Greg Chemdog found the seeds, JJ NYC of Top Dawg Seeds is the architect who built the cathedral. JJ’s work on the I-95 corridor genetics — so named for the interstate connecting the high-grade markets of New York and Florida — established the definitive blueprint for modern gas varieties. Stardawg is the crown jewel of that blueprint: a cross of Chem 4 and Tres Dawg (itself a worked Chem D line: Chem Sis × Chem 4/Chem D bx2). The paternal side is overwhelmingly Chemdog from different seed selections — which is exactly why this cross works as a concentration strategy rather than a dilution.
Stardawg was released in distinct waves, each producing legendary phenotypes. The first release gave us Guava, Corey Haim, and Illuminati — cuts that won the 2012 Denver Cup. The second release produced the elusive Lost Batch Male. But it was the 3rd release — the “Purple Release” — that changed the structural conversation around Chemdog genetics entirely. Green Dot Labs in Boulder, Colorado hunted through that batch and discovered the phenotype they named Kate Upton.
The name was chosen for the morphological perfection of the plant — statuesque, heavily branched, and undeniably structured in ways that Chemdog genetics historically are not. Historically, Chem plants are the ugly genetics of the underground: lanky, sparse, lacking bag appeal until meticulously manicured. The Kate Upton cut ended that narrative. Thick woody stems that support heavy colas without netting. Dense internodal stacking that eliminates the gappy stretch of the Chem D. And most critically, a recessive allele for anthocyanin production — the ability to fade to deep lavender and violet late in flower. A trait that was virtually nonexistent in the original green-dominant Chem lines.
The male selected by Greenpoint Seeds for the Diamond Chem project was chosen specifically to carry these Kate Upton traits forward. The result is the domestication of the wild Chem D without losing her soul. A sledgehammer wrapped in velvet.
Stardawg Release History
| Release | Focus | Key Phenotypes | Impact |
|---|---|---|---|
| 1st | Debut | Guava, Corey Haim, Illuminati | Won 2012 Denver Cup |
| 2nd | Vigor | Lost Batch Male | Highly exclusive |
| 3rd | Color / Structure | Kate Upton | Used for Diamond Chem |
| 4th | Stability | Refined Sativa/Indica cuts | Established the UK “Manny” market |
Paternal Contribution
What the Kate Upton Stud Brings to Diamond Chem
01
Structural Integrity
Thick, woody stems that support resin-drenched colas without a trellis net. Eliminates the vine-like collapse of the Chem D mother.
02
Dense Internodal Stacking
Reduces the stretch and gappiness of the Chem D. Nugs stack into solid golf balls forming long, continuous spears of flower.
03
The Purple Recessive
A recessive allele for anthocyanin production. Deep lavender and violet fading in late flower — previously nonexistent in the green-dominant Chem lines.
Breeding Logic
The Science of High-Octane Saturation
Diamond Chem is a flavor purification project. It is designed for the smoker who thinks “lemon” and “berry” are for children and who respects the roots of the culture.
01
Chem D — Sulfur Engine (72%)
The dominant force by a wide margin. Direct mother contribution plus heavy representation through the Tres Dawg bx2 grandfather. Volatile sulfur compounds at parts-per-billion detection thresholds. The garlic, the onion, the propane — 72% of this plant is pure Chem D.
02
Chem 4 — Structure & Yield (25%)
Via the Stardawg father and the Tres Dawg grandfather. Adds yield capacity, structural vigor, and “cleaner” aromatic top notes — lemon-cleaner and pine — that cut through the sulfur bass note without diluting it.
03
Affy — Foundation Whisper (3%)
A trace of Afghan genetics through the Tres Dawg grandfather. Just enough to anchor the resin density and environmental resilience without introducing any sweetness or broadleaf dilution into the Chemdog purity.
Legacy Note
This cross represents historically important inbreeding purity within the Chemdog lineage. 72% Chem D, 25% Chem 4, 3% Affy — nearly the entire genome is Dog Bud from two selections of the original thirteen seeds. No trendy poly-hybrid dilution. Diamond Chem is legacy-worthy — a foundation for the next decade of gas-dominant breeding programs.
Volatile Profile
Terpene & Sulfur Compound Architecture
The aroma of Diamond Chem is not driven by standard terpenes. It is fueled by volatile sulfur compounds — the same chemical class responsible for skunk spray and garlic.
Aroma Breakdown by Phenotype
| Mother-Dominant (Chem D Lean) | Garlic, propane, rotten meat, industrial solvent |
| Father-Dominant (Stardawg Lean) | Burnt rubber, Pine-Sol, high-octane gasoline |
| Purple Ghost (Balanced) | Floral gas, lavender fuel, chemical funk |
| Storage Warning | VSCs penetrate plastic jars and carbon filters. Glass only. Assume detection. |
Pheno-Hunt
Finding the Crown Jewel in the Pack
Because this is a regular seed release with deep-seated genetic recessives, you will see a range of expressions. Here is what to hunt for — and what each phenotype tells you about which parent is talking.
The Mutant
The phenotype for the purist. Look for the plant showing variegation — yellow leaf streaking — and a slower, vine-like habit in veg. This one holds the true narcotic power of the Chem D mother. The aroma will be offensive: propane, garlic-rubbed steak, industrial solvent. Not the prettiest plant in the room. The strongest.
Growth Vigor: Moderate
Trellis: Mandatory
Aroma Bias: Garlic / Meat / Solvent
Leaf Pattern: Variegated
Verdict: Headstash Keeper
The Industrial King
Takes after the Stardawg father. The most vigorous plant in the tent — massive stems, no variegation, donkey-dick colas that practically trim themselves. Burnt rubber, Pine-Sol, and high-octane gasoline. Top-shelf quality with mid-grade ease of growth. The cut for the commercial grower.
Growth Vigor: High
Trellis: Optional
Aroma Bias: Rubber / Gas / Pine
Leaf Pattern: Solid Green
Verdict: Production Keeper
The Purple Ghost
The unicorn carrying the Kate Upton purple recessive while retaining Chem D funk. In the final two weeks of flower, this plant fades to deep violet — trichomes standing out like diamonds against a night sky. The ultimate bag appeal pheno that moves fastest in any market without sacrificing the gas.
Growth Vigor: Moderate-High
Trellis: Recommended
Aroma Bias: Floral Gas / Lavender
Leaf Pattern: Solid → Violet Fade
Verdict: Connoisseur Keeper
“You aren’t hunting for ‘good weed’ when you crack a pack of Diamond Chem. You are hunting for a legend. The Mutant with the variegated leaves and the smell of a propane-soaked janitor’s closet — when you find it, you’ll know why the culture never let the Dog Bud die.”
— Greenpoint Seeds Genetic Archive
Cultivation
Taming the Diamond Chem
Growing this cross is a test of skill that separates master growers from casual hobbyists. The I-95 corridor genetics demand specific environmental dialing to reach their 30%+ ceiling.
Optimal Environment — Diamond Chem
| Temperature (Day) | 78–82°F (25–28°C) |
| Temperature (Night) | 62–65°F (16–18°C) |
| Humidity (Veg) | 65–70% |
| Humidity (Flower) | 40–45% |
| PPFD (Peak Flower) | 1000–1200 µmol/m²/s |
| CO₂ Target | 1200–1500 ppm |
| VPD (Late Flower) | 1.4–1.6 kPa |
| Flower Duration | 70 days from flip |
Cultural Context
The Return of the King
The contemporary cannabis market has spent the better part of a decade suffocated by the sweet, dessert-leaning hegemony of the Cookie family and its endless poly-hybrid descendants. Zkittlez, Gelatos, Sherbets — strains that offer undeniable bag appeal but often lack the raw, offensive, narcotic gravity that defined the pre-legalization era. The industry calls what is happening now the “Gas Revolution” or the “Return of the Sulfur.” The candy fatigue has set in. Veteran cultivators and discerning connoisseurs are looking backward to move forward, excavating the foundational pillars of the modern gene pool.
Diamond Chem is a refusal to accept the watered-down genetics of the corporate era. By bringing back the Chem D in this potent, structured form, Greenpoint Seeds is catering to the Heads — the ones who remember the legendary bags of Chemdog circulating in the late 90s and early 2000s. This strain represents the I-95 corridor at its most refined: the story of Greg Chemdog, JJ NYC, and Joe Brand, distilled into a single pack of regular seeds.
The effect is nearly unparalleled among modern releases — dreamy, mellowing, sedative, hitting immediately behind the eyes and spreading through the body like a warm narcotic wave. This is a strain for high-tolerance users who need to obliterate pain, insomnia, or simply the boredom of a cookie-cutter market. If you are looking for sweetness, look elsewhere. If you want the industrial funk, the garlic gas, and the narcotic gravity that made Chemdog a household name among the elite — you have found your holy grail.
Lineage Map
Genealogical Tree
DIAMOND CHEM ├── Chem D (72% total) │ └── Seed #6 of 13 — Dog Bud (Deer Creek, 1991) │ └── Greg "Chemdog" Krzanowski │ └── Stardawg (Kate Upton cut — 3rd release) ├── Chem 4 (25%) │ └── Seeds #8–11 of 13 — Dog Bud │ └── Joe Brand selections │ └── Tres Dawg (worked Chem D line) ├── Chem Sis └── Chem 4 / Chem D bx2 ├── Chem 4 ├── Chem D bx2 └── Affy (3% — structural anchor)
Final Verdict
The Crown Jewel of the I-95 Dynasty
Diamond Chem is a master-level hybrid that demands everything from the grower and gives everything back in return. It is the ultimate pre-Cookies experience, updated for the modern era with improved structure and aesthetic appeal through the Kate Upton Stardawg chassis. 72% of this genome is Chem D — the garlic matriarch stacked from both sides of the pedigree — with 25% Chem 4 for structure and yield, and a 3% whisper of Affy anchoring the foundation. No trendy poly-hybrid dilution. No cookie-cutter sweetness. The inbreeding purity is historically significant — this is a concentration of the most offensive, most potent, most narcotic genetics the underground ever produced.
The hunt is on. Look for the Mutant with the variegated leaves and the smell of a propane-soaked janitor’s closet. When you find it, you will know why the culture never let the Dog Bud die.
Quick Reference
Chem D
×
Stardawg
→
Diamond Chem
Regular Seeds · 70-Day Flower · High Yield · Moderate Difficulty · VSC-Dominant Aroma
Greenpoint Seeds — Genetic Archive
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