White Runtz
Also known as: White Runtz OG
Breeder: Cookie Fam Genetics (Runtz Crew)
White Runtz is a phenotype selection of the original Runtz bred by the Runtz Crew in California circa 2017. Selected for its blindingly white trichome coat and sweet candy aroma, it was commercialized through the Cookies brand in 2018 and quickly became one of the most sought-after exotic cultivars in the US. Clone-only from the original source — no seeds were ever officially released by Cookie Fam Genetics. Named Leafly Strain of the Year in 2020 alongside the original Runtz. Hashmakers prize it for its excellent wash characteristics and terpene retention in solventless extractions. White Runtz debuted at the 2017 Emerald Cup in Santa Rosa, California, and quickly became one of the most sought-after exotic cultivars in the state. It is a specific phenotype selection from the original Runtz line, chosen for its extreme trichome coverage and candy-sweet terpene expression. The strain's 50/50 hybrid balance delivers a versatile effect profile: an initial cerebral euphoria and creative uplift from its Gelato heritage, followed by a deep, tingly physical relaxation inherited from Zkittlez. THC typically tests between 20–25%, though some seed-bank versions claim up to 29%. The dominant terpene caryophyllene interacts directly with the CB2 receptor, which may contribute to the strain's reported anti-inflammatory and analgesic properties. White Runtz has become a foundational parent in the modern exotic cannabis market, producing notable offspring including White Cherry Runtz and various White Runtz x Gelato crosses.
Lineage & Genetics
Cross: Gelato x Zkittlez
Gelato (aka Larry Bird / Gelato #33): Sunset Sherbet × Thin Mint Girl Scout Cookies, bred by Mr. Sherbinski & Jigga of Cookie Fam in San Francisco circa 2014. Uplifting cerebral euphoria with creamy, sweet, fruity aroma and occasional purple hues. Zkittlez (aka The Original Z): Grape Ape × Grapefruit (+ undisclosed third parent), indica-dominant hybrid from the 2010s. Cannabis Cup 1st place 2016. Relaxed, sleepy stone with intense rainbow fruit candy aroma.
Lineage Dispute
Some secondary sources list White Runtz as a cross of Runtz × The White, but SeedFinder.eu, Leafly, Cookies, and the Runtz Crew themselves confirm it is a phenotype selection of the original Runtz (Gelato × Zkittlez), selected for its heavy white trichome coverage — not a cross involving The White strain.
Terpene Profile
Caryophyllene —
Limonene —
Linalool —
Myrcene —
Aroma: Loud burst of sour tropical fruit candy on jar crack — like tropical Skittles with a creamy vanilla backdrop. Sharp sweet citrus edge from limonene, spicy peppery kick from caryophyllene, subtle lavender florals from linalool, and an earthy funk underneath. Pungent enough to fill a room.
Flavor: Sweet candy-cream inhale with tropical fruit and peach notes. Mid-palate brings citrus zest and sour berry. Exhale finishes with creamy vanilla, subtle earthy undertones, and a hint of pineapple. Smooth and not harsh — sweet without being cloying.
Effects & Experience
Onset: Fast-acting cerebral euphoria within minutes of inhalation. Immediate mood elevation and mental clarity with a brightening, joyful quality.
Balanced two-phase high: initial head-focused euphoria brings happiness, giggles, and creative energy. Within 15–20 minutes, a warm body tingle develops and transitions into deep physical relaxation that dissolves muscle tension without heavy sedation. Simultaneously energized and calm.
Duration: Long-lasting — 2 to 3 hours. Body relaxation component can extend well beyond the cerebral phase.
Commonly Reported Uses
Grower's Notes
White Runtz is a phenotype selection of the original Runtz, bred by the Cookies Fam (Runtz Crew) in Southern California circa 2017 by crossing Gelato (Sunset Sherbet x Thin Mint Cookies) with Zkittlez (Grape Ape x Grapefruit). The 'White' designation refers to the cultivar's exceptionally dense trichome blanket, which gives mature flowers an almost snow-white appearance and signals elite resin production.
Growth Structure and Training
Structurally, White Runtz grows as a medium-tall hybrid with strong lateral branching and tight internode spacing. Indoors it typically reaches 100–140 cm; outdoors in full sun, plants can stretch to 200–225 cm. The plant has a pronounced stretch phase during the first two weeks of flower, often gaining 25–45 cm, so growers should flip early in height-limited spaces or employ training. Topping above the fourth or fifth node, combined with LST or a SCROG net, produces a flat, even canopy that maximizes light penetration to lower bud sites. Heavy defoliation is recommended because the dense canopy traps humidity and creates ideal conditions for botrytis (bud rot).
Flowering Time and Harvest
Flowering runs 56–70 days (8–10 weeks), with most phenotypes finishing in the 8–9 week window.
Nutrient Management
During vegetative growth, maintain 70–80°F daytime temps with 55–60% RH and feed a balanced nitrogen-rich program at 0.4–0.8 EC, stepping up to 0.8–1.2 EC in late veg. White Runtz is sensitive to overfeeding nitrogen in late veg, which can delay flower onset and reduce resin output. Transition to phosphorus- and potassium-heavy nutrients at the flip, with a mild potassium boost in weeks 7–8. Supplement calcium and magnesium early in flower to support the heavy bud density this strain is known for.
Environment and Climate
Environmental precision in flower is critical. Keep daytime temps at 68–78°F and drop humidity progressively: 50% at flip, 45% by mid-flower, and 40% in the final two weeks. The late-stage humidity reduction forces a defensive resin response, enhancing the frosty white coat that defines the strain. A slight nighttime temperature drop to 65–68°F in the final two weeks triggers anthocyanin expression, producing the purple and lavender hues prized in top-shelf presentations.
Lighting
Target PPFD of 900–1100 µmol/m²/s in flower under quality LED or HPS lighting. Some growers add UV-B supplementation in the last three weeks to further boost trichome density and THC content.
Drying and Curing
The terpene profile is led by caryophyllene, limonene, and linalool, with secondary myrcene. This combination produces White Runtz's signature candy-gas aroma: sweet citrus and cream on the front, spicy pepper and floral lavender underneath. Preserving these volatile terpenes requires a slow dry (7–10 days at 60°F/60% RH) and a minimum 3–4 week cure. Dry-trimming rather than wet-trimming is recommended, as the sugar leaves protect the delicate trichome heads during the drying process.
Yield
Indoor yields range from 450–550 g/m² under optimized conditions. Outdoor plants in warm Mediterranean or temperate climates harvest in early to mid-October, with yields of 600–1500 g per plant depending on plant size and training. Difficulty is moderate — approachable for growers with a few cycles under their belt who can manage humidity, training, and feeding schedules. The primary risk is mold from the extremely dense bud structure; aggressive airflow management and late-flower defoliation are non-negotiable for a clean harvest.
History & Origin
The Runtz strain was bred circa 2017 by a grower known only as 'Nick,' who procured Zkittlez seeds from a Bay Area grower and crossed them with Gelato 33. Nick partnered with rapper Yung LB and manager Raybama to form the Runtz Crew. They debuted Runtz at the December 2017 Emerald Cup Harvest Ball in Santa Rosa, CA — arriving with ~300 jars that sold out in under 10 minutes directly in front of the Cookies booth. The White Runtz phenotype was specifically championed by Dolla$ Up Nero via Jokes Up. In 2018, Cookies formally added Runtz to their lineup and commercialized White Runtz.
Awards & Recognition
- ●Leafly Strain of the Year 2020 (shared with original Runtz)
- ●3rd Place — 2019 Emerald Cup
- ●Runtz Rosin by Kalya Extracts: 7th Place Rosins, 2019 Emerald Cup
- ●1st Place, Hydro-Carbon Liquid — 18th Annual Emerald Cup 2022 (Cosmic x Peak x Feeling Frosty — White Runtz Live Resin)
- ●3rd Place, Outdoor Flower — Emerald Cup (Humboldt Redwood Healing, Humboldt County)
- ●Runtz family lineage wins: Emerald Cup 2019, 2020, 2021, 2022
Notable Crosses
Strains bred using White Runtz as a parent:
Frequently Asked Questions
7 common questions about White Runtz
What is White Runtz and what are its genetics?
White Runtz is a hybrid cannabis strain (50/50) bred by Cookie Fam Genetics (Runtz Crew). It is a cross of Gelato x Zkittlez, testing at 20–25% THC. White Runtz is a phenotype selection of the original Runtz bred by the Runtz Crew in California circa 2017. Selected for its blindingly white trichome coat and sweet candy aroma, it was commercialized through the Cookies brand in 2018 and quickly became one of the most sought-after exotic cultivars in the US.
What does White Runtz smell and taste like?
White Runtz's dominant terpenes are Caryophyllene, Limonene, Linalool. The aroma is described as loud burst of sour tropical fruit candy on jar crack — like tropical skittles with a creamy vanilla backdrop. sharp sweet citrus edge from limonene, spicy peppery kick from caryophyllene, subtle lavender florals from linalool, and an earthy funk underneath. pungent enough to fill a room.. The flavor profile features sweet candy-cream inhale with tropical fruit and peach notes. mid-palate brings citrus zest and sour berry. exhale finishes with creamy vanilla, subtle earthy undertones, and a hint of pineapple. smooth and not harsh — sweet without being cloying..
What are the effects of White Runtz?
Fast-acting cerebral euphoria within minutes of inhalation. Immediate mood elevation and mental clarity with a brightening, joyful quality. Balanced two-phase high: initial head-focused euphoria brings happiness, giggles, and creative energy. Within 15–20 minutes, a warm body tingle develops and transitions into deep physical relaxation that dissolves muscle tension without heavy sedation. Duration is typically long-lasting — 2 to 3 hours. body relaxation component can extend well beyond the cerebral phase.. Commonly reported uses include Chronic pain, Anxiety, Stress, Depression.
How hard is White Runtz to grow?
White Runtz is rated moderate difficulty. It flowers in 8-10 weeks, reaches medium (100-140 cm indoor) in height, and yields 450–550 g/m² indoors. Best suited for indoor preferred environments.
What are the parent strains of White Runtz?
White Runtz is a cross of Runtz. Gelato (aka Larry Bird / Gelato #33): Sunset Sherbet × Thin Mint Girl Scout Cookies, bred by Mr. Sherbinski & Jigga of Cookie Fam in San Francisco circa 2014.
What strains were bred from White Runtz?
White Runtz has been used as a parent in several notable crosses, including Zruntz, Rose Gold Runtz, White Cherry Runtz, Taxi Candi, Ogeechee. Its genetics contribute to a wide range of modern cultivars.
Has White Runtz won any cannabis awards?
Yes. White Runtz has received recognition including Leafly Strain of the Year 2020 (shared with original Runtz); 3rd Place — 2019 Emerald Cup; Runtz Rosin by Kalya Extracts: 7th Place Rosins, 2019 Emerald Cup.
Sources & References (30)
- SeedFinder.eu — seedfinder.eu/en/strain-info/white-runtz/cookie-fam-genetics
- Leafly — leafly.com/strains/white-runtz
- Leafly — leafly.com/news/strains-products/runtz-2020-leafly-strain-of-the-year
- Lab Effects — labeffects.com/blog/strain-report-white-runtz
- Dark Coast Seed — darkcoastseed.com/runtz-strain-history/
- Gentleman Toker — gentlemantoker.com/white-runtz/
- CannaConnection — cannaconnection.com/strains/white-runtz
- Rare Harvest — rareharvest.net/blogs/strain-library/white-runtz-genetics-guide
- Grower's Notes cultivation sources:
- https://hypnoseeds.com/the-blog/how-to-grow-white-runtz-seeds-2025-grow-diary/
- https://blimburnseeds.com/blog/marijuana-crop-guide/how-to-grow-white-runtz-weed-strain/
- https://apotforpot.com/blogs/marijuana-strains/runtz-strain-review/
- https://www.thcfarmer.com/threads/white-runtz.147370/
- https://www.mmj.com/learn/strains/white-runtz/
- https://smoakland.com/news/white-runtz-weed-strain-review-the-ultimate-exotic-experience
- https://seedsherenow.com/runtz-family-tree/
- https://seedfinder.eu/index.php/en/strain-info/white-runtz/cookie-fam-genetics
- https://rareharvest.net/blogs/strain-library/white-runtz-genetics-guide
- https://pevgrow.com/en/white-runtz-strain.html
- https://www.northatlanticseed.com/product/white-runtz-f-2/
- https://canaxseeds.com/feminized-seeds/white-runtz/
- https://www.leafly.com/strains/white-runtz
- https://www.alignedwellnessdc.com/post/white-runtz-strain
- https://mellowfellow.fun/blogs/learn/white-runtz-strain-review
- https://beststrainfinder.com/strains/Hybrid/white-runtz-strain
- https://labeffects.com/blog/strain-report-white-runtz
- https://cannabiscupwinners.com/blog/2022/05/20/emerald-cup-awards-2022/
- https://www.feelingfrosty.com/awards
- https://respectmyregion.com/emerald-cup-awards-hollywood-winners/
- https://growguide.app/blog/pink-runtz-strain-grow-guide-for-dense-candy-coated-buds/
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