Grape Stomper
Also known as: Sour Grapes
Breeder: Gage Green Genetics (JojoRizo, original cross)
Grape Stomper is a sativa-leaning hybrid originally created by the late breeder JojoRizo, who crossed his prized Purple Elephant mother (Purple Urkle x Hashplant) with an Elite Seeds Chemdawg Sour Diesel male he called 'Snowman.' The resulting clone-only cultivar became renowned for its extreme resin production, vivid grape candy aroma, and potent cerebral effects that set it apart from the one-dimensional indica-heavy grape strains of its era. The strain's history is marked by a naming controversy. A friend of Gage Green Genetics obtained the original Grape Stomper clone and sold it to Blue Sky, a California collective, who rebranded it 'Sour Grapes' to claim credit for the genetics. Despite this, the strain's origins remained well-documented in breeding circles. Gage Green Genetics later recreated Grape Stomper in seed form by backcrossing the original clone to the Snowman male, producing the Purple Snowman and Grape Stomper BX2 seed lines that made the genetics available beyond clone-only distribution. Grape Stomper gained significant recognition in competition circuits, winning three California Cannabis Cup awards according to Gage Green Genetics, and was featured in High Times magazine. In 2017, High Times inducted Gage Green Group into its Seed Bank Hall of Fame, specifically citing Grape Stomper as a Cannabis Cup winner. The strain has also become an influential parent in modern breeding — Cannarado Genetics used it to create Grape Pie (Cherry Pie x Grape Stomper), which itself became a cornerstone cultivar in the dessert-strain lineage. The Snowman male's contribution cannot be overstated. While the Purple Elephant mother provided the grape terpene foundation and colorful appearance, the Snowman male imparted the heavy trichome coverage that gives Grape Stomper buds their signature sugar-coated look, along with the sativa-dominant cerebral effects that distinguish it from purely sedative grape varieties. Cannabis Encyclopedia reviewer Ry Prichard noted that Grape Stomper plants are 'generally easy to pick out of a lineup — the velvety trichome-laden leaves shine with a white sheen, even from a distance.'
Lineage & Genetics
Cross: Purple Elephant x Chemdawg Sour Diesel
Purple Elephant is JojoRizo's proprietary cross of Purple Urkle and a Hashplant variety. It contributes the grape-forward terpene profile, purple coloration potential, and indica-leaning structure. Purple Urkle itself is a California heritage clone from the Emerald Triangle with deep purple expression and berry aromatics. The Chemdawg Sour Diesel male — nicknamed 'Snowman' for the frost it imparts — was sourced from Elite Seeds. Whether it contains true Chemdawg 91 genetics or is actually a Headband (OG Kush x Sour Diesel) cut remains debated, but it contributed the sativa-dominant effects, resin production, and diesel undertones that balance the grape sweetness.
Lineage Dispute
The male pollen donor is listed by Gage Green Genetics and SeedFinder.eu as Elite Seeds' Chemdawg Sour Diesel, nicknamed 'Snowman.' However, multiple community sources — including the detailed Cannabis Encyclopedia review by Ry Prichard — note that the Elite Seeds Chemdog was widely believed to be a Headband (OG Kush x Sour Diesel) cut rather than a true Chemdawg 91. The naming controversy extends to the strain itself: after a friend of Gage Green obtained the original clone and sold it to California's Blue Sky collective, Blue Sky renamed it 'Sour Grapes' to obscure the breeder's credit. Both names remain in circulation, though 'Grape Stomper' is the original.
Terpene Profile
Myrcene — Primary driver of the sweet grape and berry character; provides the fruity foundation that defines the strain's aroma
Limonene — Bright citrus notes that add tartness and prevent the grape sweetness from becoming one-dimensional
Caryophyllene — Peppery spice that adds depth and complexity alongside the fruit-forward top notes
Aroma: Intensely sweet grape candy with a slightly tart, sour citrus layer and faint fuel undertones from the diesel lineage. The scent is thick and intoxicating — described by the Cannabis Encyclopedia as superior to other supposed 'grape' strains like Grape Ape. Breaking apart the buds releases the strongest aroma, with resinous trichomes coating the fingers.
Flavor: Sweet, velvety grape candy dominates the inhale, translating the aroma directly into flavor. The exhale introduces berry undertones — black currant and blueberry — followed by peppery spice and a lingering chemical, almost gasoline-like finish from the Chemdawg Sour Diesel parentage. Some phenotypes express a slight herbal, pine-like note on the backend. A proper 2-3 week cure significantly enhances flavor complexity.
Effects & Experience
Onset: Fast-acting — begins with a potent ear-ringing cerebral rush and a band of pressure through the head and face, a signature trait inherited from the Sour Diesel and Headband lineage.
The initial hour delivers intense cerebral effects: euphoria, talkativeness, giggly uplift, and creative energy. This transitions into progressive full-body relaxation with vibrating sensations that course through the torso, particularly relaxing the neck, upper back, and shoulders. Despite the sativa-dominant genetics, the potency makes it almost too strong for true daytime use — best suited as an early evening strain when active tasks are winding down.
Duration: 2-3 hours
Commonly Reported Uses
Grower's Notes
Grape Stomper is a moderately challenging but highly rewarding cultivar that traces its clone-only origins to JojoRizo's breeding work and was later recreated in seed form by Gage Green Genetics. The plant exhibits hybrid vigor with sativa-dominant growth patterns that require attentive canopy management but reward growers with heavy resin production and the strain's signature grape candy aroma.
Growth Structure and Training
The plant develops vigorous lateral branching with a medium height profile that typically stays between 3 and 5 feet indoors. After flipping to 12/12, expect a sativa-influenced stretch of 50-100% additional height in the first two to three weeks of flower. Top once at the fourth or fifth node during veg to encourage bushier lateral growth, then apply Low-Stress Training or install a SCROG net just before the flip to create a flat, even canopy. The strong stems handle training well. Strategic defoliation at day 21 and day 42 of flower improves airflow through the naturally dense canopy and directs energy to developing bud sites.
Flowering Time and Harvest
Most phenotypes finish in 8 to 10 weeks from the flip, with the sweet spot for terpene maturity typically falling around 9 weeks. Resin-heavy outliers may benefit from pushing to 10 weeks for full expression. Harvest when 20-30% of trichomes have turned amber for the balanced cerebral-to-body effect the strain is known for. Earlier harvest at peak milky trichomes produces a more energetic, heady experience. A proper cure of at least 2-3 weeks is essential — Grape Stomper's grape candy flavor develops significantly during this period.
Environment and Climate
Grape Stomper thrives in temperatures between 68-82°F with humidity at 50-70% during veg, tapering to 40-50% in flower. The dense, resinous buds are prone to mold and botrytis if humidity remains high during the final weeks, so strong airflow through and across the canopy is critical. Cooler nighttime temperatures in late flower (low-to-mid 60s°F) will trigger purple coloration from the Purple Elephant parent without harming development. The plant shows above-average resilience to pests and cold conditions.
Nutrient Management
Feed at moderate strength — start at 50-75% of manufacturer recommendations and increase based on plant response. Grape Stomper is not as heavy a feeder as pure diesel lines but benefits from a phosphorus-potassium boost during peak flower. Allow the top inch of medium to dry between waterings to prevent root issues that the dense root system can be susceptible to. Hydroponic setups can accelerate growth and increase yields.
Light Requirements
During veg, 400-500 PPFD with full-spectrum LED provides solid structural development. In flower, push to 600-800 PPFD — the strain responds to high light intensity with increased trichome density and heavier buds. The compact canopy created by proper training allows for uniform light distribution.
Yield and Bud Quality
Indoor yields range from 400-550 g/m² under well-managed conditions, with experienced growers hitting the upper end through proper training and environmental control. Outdoor plants in warm climates can produce 450-800 g per plant with generous veg time and full sun. Buds develop into medium-to-large chunky clusters coated with an extraordinary layer of trichomes — the Snowman male's defining contribution. Trichome production is generous enough to make this strain an excellent candidate for solventless extraction and hash production.
Outdoor Considerations
Grape Stomper performs well outdoors in warm, sunny climates with steady airflow. Harvest typically falls in early-to-mid October in the Northern Hemisphere. Because the dense buds trap moisture, outdoor growers should monitor humidity carefully in the final weeks and consider light thinning of the interior canopy to prevent mold. The plant's natural pest resistance is a significant advantage in outdoor settings.
History & Origin
Grape Stomper was created by JojoRizo (now deceased), who crossed his Purple Elephant mother (Purple Urkle x Hashplant) with an Elite Seeds Chemdawg Sour Diesel male nicknamed 'Snowman.' The strain circulated as a clone-only cultivar until a friend of Gage Green Genetics obtained a cut and sold it to Blue Sky, a California dispensary collective, who renamed it 'Sour Grapes.' Gage Green Genetics later recreated the strain in seed form through backcrossing — first as Purple Snowman (Grape Stomper x Snowman), then as Grape Stomper BX2. The strain was featured in High Times and won three California Cannabis Cup awards. In 2017, High Times inducted Gage Green Group into its Seed Bank Hall of Fame, citing Grape Stomper among their championship genetics.
Awards & Recognition
- ●3x California Cannabis Cup winner (per Gage Green Genetics / SeedFinder.eu)
- ●Featured in High Times magazine
- ●2017 High Times Seed Bank Hall of Fame — Gage Green Group (Grape Stomper cited as key cultivar)
Notable Crosses
Strains bred using Grape Stomper as a parent:
Frequently Asked Questions
7 common questions about Grape Stomper
What is Grape Stomper and what are its genetics?
Grape Stomper is a hybrid cannabis strain (60% Sativa / 40% Indica) bred by Gage Green Genetics (JojoRizo, original cross). It is a cross of Purple Elephant x Chemdawg Sour Diesel, testing at 18-26% THC. Grape Stomper is a sativa-leaning hybrid originally created by the late breeder JojoRizo, who crossed his prized Purple Elephant mother (Purple Urkle x Hashplant) with an Elite Seeds Chemdawg Sour Diesel male he called 'Snowman.' The resulting clone-only cultivar became renowned for its extreme resin production, vivid grape candy aroma, and potent cerebral effects that set it apart from the one-dimensional indica-heavy grape strains of its era. The strain's history is marked by a naming controversy. A friend of Gage Green Genetics obtained the original Grape Stomper clone and sold it to Blue Sky, a California collective, who rebranded it 'Sour Grapes' to claim credit for the genetics.
What does Grape Stomper smell and taste like?
Grape Stomper's dominant terpenes are Myrcene. The aroma is described as intensely sweet grape candy with a slightly tart, sour citrus layer and faint fuel undertones from the diesel lineage. the scent is thick and intoxicating — described by the cannabis encyclopedia as superior to other supposed 'grape' strains like grape ape. breaking apart the buds releases the strongest aroma, with resinous trichomes coating the fingers.. The flavor profile features sweet, velvety grape candy dominates the inhale, translating the aroma directly into flavor. the exhale introduces berry undertones — black currant and blueberry — followed by peppery spice and a lingering chemical, almost gasoline-like finish from the chemdawg sour diesel parentage. some phenotypes express a slight herbal, pine-like note on the backend. a proper 2-3 week cure significantly enhances flavor complexity..
What are the effects of Grape Stomper?
Fast-acting — begins with a potent ear-ringing cerebral rush and a band of pressure through the head and face, a signature trait inherited from the Sour Diesel and Headband lineage. The initial hour delivers intense cerebral effects: euphoria, talkativeness, giggly uplift, and creative energy. This transitions into progressive full-body relaxation with vibrating sensations that course through the torso, particularly relaxing the neck, upper back, and shoulders. Duration is typically 2-3 hours. Commonly reported uses include Muscle relaxation, Appetite stimulation, Mood elevation, Stress relief.
How hard is Grape Stomper to grow?
Grape Stomper is rated moderate difficulty. It flowers in 8-10 weeks, reaches medium (3-5 ft indoor) in height, and yields 400-550 g/m² indoors. Best suited for indoor, outdoor, greenhouse environments.
What are the parent strains of Grape Stomper?
Grape Stomper is a cross of Purple Elephant and Chemdawg Sour Diesel. Purple Elephant is JojoRizo's proprietary cross of Purple Urkle and a Hashplant variety. It contributes the grape-forward terpene profile, purple coloration potential, and indica-leaning structure.
What strains were bred from Grape Stomper?
Grape Stomper has been used as a parent in several notable crosses, including Grape Pie, MAC Stomper, Purple Snowman, Grape Stomper BX2. Its genetics contribute to a wide range of modern cultivars.
Has Grape Stomper won any cannabis awards?
Yes. Grape Stomper has received recognition including 3x California Cannabis Cup winner (per Gage Green Genetics / SeedFinder.eu); Featured in High Times magazine; 2017 High Times Seed Bank Hall of Fame — Gage Green Group (Grape Stomper cited as key cultivar).
Sources & References (26)
- SeedFinder.eu — Grape Stomper (Gage Green Genetics) strain info page: breeder, lineage, flowering time, genealogy
- SeedFinder.eu — Purple Snowman (Gage Green Genetics): Grape Stomper remake description, 3 Cali Cup wins, High Times feature
- SeedFinder.eu — Grape Stomper BX2 (Gage Green Genetics): backcross description, flowering time, effects
- Leafly — Grape Stomper aka Sour Grapes strain page: terpenes (Myrcene, Limonene, Caryophyllene), effects, 432 user reviews
- THC Farmer / Cannabis Encyclopedia — Ry Prichard strain review: detailed lineage history, JojoRizo attribution, Snowman male controversy, effects profile, visual description
- Toke of the Town / Cannabis Encyclopedia — Strain review confirming lineage and 25%+ THC testing
- Kind Green Buds — Grape Stomper strain page: breeder, THC 18-24%, terpene profile, flowering time 8-9 weeks, yield data
- CannaConnection — Grape Stomper strain info: THC 18-26%, growth traits, balanced hybrid profile, 9-10 week flowering
- Seeds Here Now — Grape Stomper strain review: yield (1.5-2 oz/ft²), purple coloration, cure recommendations
- NuggMD — Grape Stomper strain overview: terpenes, cultivation tips, 9-10 week flowering
- High Times — 2017 Seed Bank Hall of Fame: Gage Green Group inducted, Grape Stomper cited as Cannabis Cup winner
- Old School Chronic — Grape Stomper BX2 product page: lineage, height, appearance, clone-only history
- Phresh Cannabis — Grape Stomper strain page: 22% THC, terpenes (Limonene, Myrcene, Linalool), award listings
- https://seedfinder.eu/en/strain-info/grape-stomper/gage-green-genetics
- https://seedfinder.eu/en/strain-info/purple-snowman/gage-green-genetics
- https://seedfinder.eu/en/strain-info/grape-stomper-bx2/gage-green-genetics
- https://www.leafly.ca/strains/sour-grapes
- https://www.thcfarmer.com/threads/cannabis-encyclopedia-strain-review-grape-stomper.69473/
- https://www.tokeofthetown.com/2013/09/cannabis_encyclopedia_strain_review_grape_stomper.php/
- https://kindgreenbuds.com/marijuana-strains/grape-stomper/
- https://www.cannaconnection.com/strains/grape-stomper-aka-sour-grapes
- https://seedsherenow.com/grape-stomper-strain-review/
- https://www.nuggmd.com/strains/grape-stomper
- https://hightimes.com/news/the-2017-high-times-seed-bank-hall-of-fame/
- https://www.oldschoolchronic.com/product-page/grape-stomper-bx2-ggg-cut-seeds
- https://phreshcannabis.com/strains/grape-stomper/
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