Hybrid · Terphogz / 3rd Gen Family
Runtz
Runtz is the Cookies Fam and Terphogz collaboration cross of Zkittlez and Gelato that became the most-searched cannabis strain of 2020 on Leafly. The candy-fruit terpene profile carries directly from the Zkittlez side, while the Gelato parent contributes dense, gassy buds and the resin coverage that gives the strain its commercial appeal. Plants finish in eight to nine weeks indoors with moderate yields and a balanced hybrid high that hits cerebral first and settles into mild body relaxation. The popularity of the name led to one of the most heavily counterfeited strain markets in modern cannabis — buyers should verify breeder source.
Reviewed 2026-05-23· Sources: seedfinder.eu, Terphogz interviews, Leafly 2020 trends
Potency
- THC range
- 19–29%
- Typical THC
- 24%
- CBD
- up to 0.1%
Flowering
- Indoor weeks
- 8–9 wk
- Difficulty
- Moderate
- Climate
- Mediterranean, indoor
Yield & size
- Indoor
- 450-550 g/m²
- Outdoor
- 450-650 g/plant
- Height
- 100-130 cm
Indica / sativa ratio
Terpene profile
The aromatic compounds below shape how Runtz smells, tastes, and ultimately feels in the body.
- dominant
Caryophyllene
Peppery and spicy — the only terpene that binds CB2 receptors, studied for anti-inflammatory action.
- secondary
Limonene
Uplifting citrus — typically associated with mood elevation and stress relief.
- secondary
Linalool
Floral and lavender-like — calming, often noted for sleep and anxiety support.
- minor
Humulene
Hoppy and earthy — appetite-suppressing and shared with hops and sage.
Reported side effects
Lineage
Runtz traces to Zkittlez × Gelato. The cross sits in the Cookies x Zkittlez family, which influences both the terpene profile and the flowering structure described above.
Genetic family tree
Documented parents and grandparents for Runtz based on breeder catalogues. Library entries are clickable; ancestors not yet documented on this site appear in a lighter, non-linked box.
Strains crossed with Runtz
Runtz is a parent of 4 strains in the broader catalogue. These are crosses that carry Runtz genetics on at least one side of the cross.
Grow profile
Grow profile
- Indica / sativa
- 50% / 50%
- Flowering days
- 56–63 days
- Stretch
- Moderate
- Pest resistance
- Moderate
- Mold resistance
- Moderate
- Training methods
- topping, lst, scrog
Feed schedule for Runtz
These EC and NPK targets are starting points calibrated for the strain's Hybrid lean and moderate difficulty rating — not gospel. Drop 15-20% off any EC ceiling on your first run and let the plant tell you where it actually wants to feed.
Suggested feed schedule
- Late veg
- 1.3-1.5 EC
- Early flower
- 1.4-1.6 EC, NPK 2-2-4
- Mid flower
- 1.7-1.9 EC, NPK 1-3-5
- Late flower
- 1.5-1.7 EC
- Final week
- Plain pH-balanced water for the last 7-10 days; light flush if you ran nutrients on the higher end.
Full breakdown of feed math, runoff testing, and salt buildup in our nutrient guide.
What to expect through the grow cycle
Runtz is documented with a 9-week flower split across the standard hybrid phases. The visual below maps a documented 13-week cycle built from 4weeks of vegetative growth and the strain's published flowering window.
Published grow reports for Runtz concentrate the most observational notes on the mid-to-late flower transition. This timeline is descriptive — it reflects what reports document, not a how-to. Actual week-to-week behaviour varies with phenotype, light intensity, pot size, and environment.
Phase details
- Veg (weeks 1-4)
- The documented vegetative period for Runtz. Plants establish root structure, leaf canopy, and node count before flower triggering, with a moderate difficulty rating shaping how forgiving the early canopy work tends to be.
- Stretch (weeks 5-7)
- Runtz is documented as having moderate stretch. Reports describe the plant roughly doubling in height during this phase as the hybrid structure establishes its final flowering frame.
- Bud sites (weeks 8-9)
- Pre-flowers form at the nodes and calyxes begin to develop. Grow reports for Runtznote this as the window where the canopy's eventual bud distribution becomes visible.
- Bud development (weeks 10-11)
- Flowers thicken and calyxes fatten through this phase. Documented Runtz runs show the bulk of visible flower mass accumulating here, with resin production accelerating toward the end.
- Ripening (week 12)
- Trichomes transition from clear toward cloudy and amber. Reports for Runtz describe the Caryophyllene-led terpene profile maturing through this window, with aroma sharpening week over week.
- Final (week 13)
- Calyx swelling is documented as complete and the harvest window opens. Published Runtz runs end here, within the 8-9 week flowering range reported by the breeder.
Flavor & aroma
Reported effects
Common questions about Runtz
Why is Runtz so commonly counterfeited?
The brand became a viral marketing phenomenon faster than the breeders could release authentic seed. By 2020 most packs labeled Runtz on the gray market had no relationship to the original Cookies-Terphogz cross.
Is Runtz indica or sativa?
Runtz is a balanced 50/50 hybrid in most phenotypes. Pink Runtz leans indica, while White Runtz leans slightly sativa.
Breeder of record
Terphogz / 3rd Gen Family
View breeder profile and other strains →
More from Terphogz / 3rd Gen Family
Strains similar to Runtz
These picks lean on the same terpene profile and parent genetics as Runtz — shared dominant terps, overlapping lineage, and matching indica/sativa lean. No star ratings or popularity contests, just overlap on the traits that actually drive a similar grow and smoke.