Heavy Gas
Breeder: Seed Junky Genetics (pheno-hunted by Prime Cuts Nursery)Prime Cuts Nursery →Seed Junky Genetics →
Heavy Gas is keeper #7 from Prime Cuts Nursery's pheno hunt of Seed Junky Genetics seeds, selected for the nursery's Spring 2027 lineup and available only as clones cut from that one plant. The nursery describes its keeper as a loud, straight-fuel plant with heavy yields that finishes in 8 to 9 weeks, and its August 2026 photos show dense, frosted, green flowers with orange pistils. The breeder has never published this cross, so its parents, potency and terpene profile are unknown.
| Type | Hybrid (Unpublished) |
|---|---|
| Breeder | Seed Junky Genetics (pheno-hunted by Prime Cuts Nursery) Prime Cuts Nursery strains →Seed Junky Genetics strains → |
| Lineage | Undisclosed |
| THC | Unknown |
| Dominant terpenes | Not published |
| Flower time | 8-9 weeks |
| Yield (indoor / outdoor) | Heavy (nursery report) / Unknown |
| Difficulty | Unknown |
| Height / stretch | Unknown |
| Clones at Prime Cuts | Heavy Gas is on our genetics menu but has no clones ready or scheduled right now (as of Nov 6, 2026). Call or text to be notified. View Heavy Gas clones → |
Lineage & Genetics
Cross: Undisclosed
Unknown. Seed Junky Genetics has not published the parents of the seeds this keeper came from, and the nursery has no record of the cross, so there is no parent contribution that can be described without inventing one. The name does not identify the parents either. The pedigrees of True Canna Genetics' Heavy Gas, Dark Horse Genetics' Heavy Gas Hitter and Seed Junky's own Gas Face, Animal Gas and Permanent Gas belong to those plants and have not been borrowed for this page. If the breeder ever names the cross, each parent's contribution can be written from that parent's own record.
Lineage Dispute
Seed Junky Genetics has never published the cross behind Heavy Gas. The nursery owner confirmed on November 3, 2026 that the seeds Prime Cuts hunted came from Seed Junky, but on that date no strain called Heavy Gas appeared in Seed Junky's seed catalog, its brand or flower sites, SeedFinder's list of 97 Seed Junky strains, Leafly, Weedmaps or the seed banks that carry the breeder, so no parents are given here. Don't confuse it with True Canna Genetics' Heavy Gas (a Comeback Kush #77 F2), Dark Horse Genetics' Heavy Gas Hitter (GMO x Bruce Banner 2.0), or Seed Junky's own Heavy Eye, Gas Face, Animal Gas and Permanent Gas. Those are separately named plants, and no growing, terpene, potency or effect data from them is used on this page.
Terpene Profile
Aroma: Loud gas and straight fuel, in the nursery's own description of keeper #7. That description is the nursery's, not a lab result or a breeder description, and no second source has described the aroma. Secondary notes, and how the nose develops through bloom and cure, are not documented.
Flavor: Not documented. No source describes the inhale or exhale of this keeper; the nursery's fuel description covers the nose only.
Effects & Experience
Onset: Not documented.
Not documented. No breeder description, review or user report of the effects of this keeper exists.
Duration: Not documented.
Grower's Notes
Heavy Gas is keeper #7 from Prime Cuts Nursery's pheno hunt of Seed Junky Genetics seeds, and every clone the nursery sells is a cut of that one plant. Its grow record is thin because the breeder has never released or described a strain by this name. What is known is the nursery's own working description of its keeper and what the nursery's August 2026 photos of that plant show; everything else below is marked as not documented, and any general practice is labeled as such rather than presented as a trait of this cut.
Flowering Time and Harvest
The nursery's working figure for keeper #7 is 8 to 9 weeks of flower. That figure is the nursery's own, not a breeder specification, and no outdoor finish date or harvest cue has been recorded for this plant. Until more runs are on record, general practice is to time the harvest by trichome heads under magnification rather than by the calendar.
Yield
The nursery describes the yield of its keeper as massive. That is a qualitative description, not a weight: no grams per square meter, grams per light or per-plant figure has been recorded, indoors or outdoors.
Bud Structure and Trichomes
This is the best-documented part of the plant, and it rests on the nursery's August 2026 photos of keeper #7. They show dense, rounded flowers built from stacked calyxes, continuous frost running across the calyxes and onto the sugar leaves, and short orange pistils. As general practice, flower this tight and this frosted is slow to trim, so trim labor is worth planning for; that is not a recorded trait of this cut.
Color Development
The photographed keeper runs lime to forest green under its frost, with orange pistils. No purple appears in those photos and no cold-induced colour change has been documented, so density and frost, not colour, are what the record shows.
Growth Structure and Training
Not documented. No height, stretch, internode spacing or response to topping, low-stress training or a screen has been recorded for this keeper, and the breeder has published nothing. A first run should leave headroom above the canopy and treat the stretch as unknown.
Nutrient Management
Not documented. No feed strength, EC target, pH preference or calcium and magnesium sensitivity has been recorded for this keeper, and none has been borrowed from other plants. As general practice, a plant expected to carry a heavy bloom load gets a full bloom program with the mid-canopy leaves watched for early fade.
Environment and Climate
Not documented. No temperature, humidity or VPD targets have been recorded for this keeper, and outdoor performance is unknown. As general practice for dense, heavy-yielding flower, steady airflow through the canopy and a falling humidity trend in late bloom are the safe defaults.
Pest and Disease Resistance
Not documented. No mold, mildew, pest or hermaphrodite behaviour has been recorded for this keeper, so resistance should be treated as unknown rather than assumed. As nursery process, not a trait of the plant, the mother stock is PCR-tested for HLVd.
Drying and Curing
Not documented. No drying or curing protocol has been recorded for this keeper. As general practice, colas this dense dry from the outside in, so a slow, cool dry followed by a controlled cure is the cautious starting point.
Wash and Extraction
Not documented. The frost in the nursery's photos is visually heavy, but no wash yield, rosin return or extraction run has been recorded for this cut, so solventless performance is unknown and a small test run would be the first real data.
History & Origin
Seed Junky Genetics is JBeezy's Southern California breeding house, started in the early 2000s in a small garage and now based in Chatsworth. It describes itself as a world leader in pheno hunting and claims more than 93 strains bred in-house, with public work that includes Wedding Cake, Ice Cream Cake, Permanent Marker, Gas Face and Animal Gas. Heavy Gas is not among its published strains. Prime Cuts Nursery popped Seed Junky Genetics seeds, pheno-hunted them and kept plant #7 for its Spring 2027 lineup, according to the nursery owner and the nursery's hunt records. The clones Prime Cuts sells are cuts of that one keeper, which means the plant exists only as cuttings of that selection. Heavy Gas is the nursery's name for it. No awards, drop date or release history exist for a Seed Junky strain called Heavy Gas. The awards Seed Junky has won with other gas-named cultivars, such as Gas Face, belong to those plants. True Canna Genetics' Heavy Gas and Dark Horse Genetics' Heavy Gas Hitter are unrelated plants from other breeders that happen to share part of the name.
Frequently Asked Questions
3 common questions about Heavy Gas
What is Heavy Gas and what are its genetics?
Heavy Gas is a hybrid cannabis strain bred by Seed Junky Genetics (pheno-hunted by Prime Cuts Nursery). Heavy Gas is keeper #7 from Prime Cuts Nursery's pheno hunt of Seed Junky Genetics seeds, selected for the nursery's Spring 2027 lineup and available only as clones cut from that one plant. The nursery describes its keeper as a loud, straight-fuel plant with heavy yields that finishes in 8 to 9 weeks, and its August 2026 photos show dense, frosted, green flowers with orange pistils.
What does Heavy Gas smell and taste like?
The aroma is described as loud gas and straight fuel, in the nursery's own description of keeper #7. That description is the nursery's, not a lab result or a breeder description, and no second source has described the aroma. Secondary notes, and how the nose develops through bloom and cure, are not documented.
How hard is Heavy Gas to grow?
Heavy Gas flowers in 8-9 weeks and yields heavy (nursery report) indoors. Best suited for indoor environments.
Sources & References (17)
- https://www.seedjunkygenetics.com/home/
- https://www.seedjunky.com/
- https://www.seedjunky.com/content/genetics
- https://www.seedjunkyflower.com/strain
- https://seedfinder.eu/en/database/breeder/seed-junky-genetics
- https://seedfinder.eu/en/strain-info/gas-face/seed-junky-genetics
- https://seedfinder.eu/en/strain-info/animal-gas/seed-junky-genetics
- https://www.leafly.com/brands/seed-junky
- https://weedmaps.com/brands/seed-junky/products
- https://weedmaps.com/brands/seed-junky/products/seed-junky-seed-junky-caffeine-big-buds-7g
- https://neptuneseedbank.com/brand/seed-junky-genetics/
- https://seedsherenow.com/seed-junky-genetics-brand-page/
- https://seedsherenow.com/?s=Heavy+Gas
- https://truecannagenetics.com/product/heavy-gas-comeback-kush-77-f2/
- https://medbud.wiki/cultivars/hgh/
- https://www.primecutsnursery.com/strains/permanent-gas
- https://www.primecutsnursery.com/hplvd-testing
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