Catalogue entry · lab-tested · every claim cited
Watermelon Z, also sold as Watermelon Zkittlez, is an indica-dominant hybrid that Leafly, Weedmaps and AllBud trace to a cross of The Original Z, the strain long sold as Zkittlez, and Watermelon.1,2,3,4 Weedmaps says the cross is widely attributed to Dying Breed Seeds and 3rd Gen Family in California, but SeedFinder lists Dying Breed’s own version with different parents.2,5 It tests at a median total THC of 18.60% across 63 state lab tests of Watermelon Z flower, with the middle half of results between 15.27% and 22.59%, a small sample.6 CBD is negligible: none of the 25 tests that reported CBD reached 1%.6
Watermelon Z is usually an indica-dominant cross of The Original Z (Zkittlez) and Watermelon, but one breeder listing differs. Parents, seed lines, offspring.
Plate IIWatermelon Z flower tested at 18.60% median THC (15.27%–22.59%) in only 63 lab tests, mostly from Michigan and Nevada: a small sample. CBD, terpenes, caveats.
Plate IIILeafly users report sleepy, relaxed and giggly and rate Watermelon Z mostly calming; some seed lines are sold as energizing. Downsides: headache, dry mouth.
Plate IVWatermelon Zkittlez flowers in about 8–9 weeks (Weedmaps) or 60–63 days (seed sellers). Breeder specs, yields and heights side by side, and why sources differ.
Plate VWatermelon Z flower on Weedmaps on Oct 4, 2026: 216 store listings in 16 of 27 US markets, 104 near Los Angeles, mostly infused flower.
Plate VIHow a Zkittlez × Watermelon cross from California became Watermelon Z: the Z family’s cup wins, the disputed parents and the candy-name settlement. Sourced.
Indica-dominant, by most accounts. Leafly labels it indica and describes an indica-dominant hybrid, Weedmaps also says indica-dominant, AllBud lists 70% indica and Barney’s Farm’s seed version 55%.1,2,3,8 The exceptions are seed lines: SeedFinder describes Dying Breed Seeds’ version as mostly sativa and Purple City Genetics’ as sativa-dominant, and Pyramid Seeds lists 50/50.5,7,9
A fruity hybrid usually traced to The Original Z, the 2016 Emerald Cup winner long sold as Zkittlez, crossed with an indica called Watermelon.1,2,3,4 Leafly, Weedmaps and AllBud give that cross, and Leafly lists Watermelon, also called Watermelon Kush or Watermelon OG, as an indica with unknown parents.1,2,3,10
Our measurements come from a small sample: the median total THC across 63 state lab tests was 18.60%, and 19.0% reached 25% or more.6 Strain databases list more: 24% on Leafly, 25% on AllBud and 21–28% on Weedmaps.1,2,3
Sweet and fruity. Leafly users list tropical, tree fruit and sweet; on Weedmaps, 44% of flavor reports say sweet, 34% tropical and 22% earthy; AllBud describes sweet citrus and watermelon with a sour edge.1,2,3
Accounts differ. Weedmaps says the Zkittlez × Watermelon cross is widely attributed to Dying Breed Seeds and 3rd Gen Family; SeedFinder describes Dying Breed Seeds as a Mendocino, California, company led by Shiloh Massive and the 3rd Gen Family, but lists its Watermelon Zkittlez as Watermelon Zum Zum #3 × OG Eddy.2,5,11 SeedFinder lists nine breeders’ versions in all, including Barney’s Farm, Pyramid Seeds and Purple City Genetics.12
Usually, yes. Leafly’s Watermelon Zkittlez page carries the name Watermelon Z and refers to the longer name only as an infringing candy name, and Weedmaps lists Watermelon Z as another name for Watermelon Zkittlez.1,2 Weedmaps adds that a separate Purple City Genetics version, sometimes also called Watermelon Z, descends from different parents.2
Full lab data: by year, by state, terpenes and the downloadable dataset →
Watermelon Z does not appear in the sales rankings we checked: Leafly’s best-selling strains of 2025, Cannabis Business Times’ California top-10 flower lists for 2024 and 2025, and The Marijuana Herald’s September 2026 list of top sellers in 23 states.13,14,15,16 Its Leafly page has 224 ratings and its AllBud page 19 reviews.1,3
On Oct 4, 2026, Weedmaps showed Watermelon Z flower at 216 store listings in 16 of 27 US markets, though 131 of the 253 menu items were infused flower.17 The name travels on extracts too: in state lab records more concentrate results than flower tests carry it (71 against 63), STIIIZY sells Watermelon Z as an infused flower, and Leafly noted Watermelon Z cartridges from Rockin Extract in 2024.6,18,19
Its parent is the famous one: Zkittlez took first-place indica honors at the 2015 High Times Cannabis Cups in Michigan and San Francisco and won the 2016 Emerald Cup.4,20 Leafly has pages for several strains bred from Watermelon Z, including Watermelon Gelato, Watermelon Runtz and Watermelon Mimosa.21,22,23
| Market | Stores | Menu items | Median eighth |
|---|---|---|---|
| Los Angeles, CA | 104 | 111 | $26.74 (n=8) |
| Detroit, MI | 34 | 41 | $17.50 (n=6) |
| Oklahoma City, OK | 16 | 20 | $25.00 (n=13) |
| New York, NY | 16 | 16 | $38.00 (n=10) |
| Philadelphia, PA | 15 | 25 | — |
| Chicago, IL | 8 | 12 | $35.50 (n=8) |
Stores within 50 miles listing Watermelon Z flower on Weedmaps, Oct 4, 2026.17
Watermelon Z
Zkittlez × Watermelon or a Dying Breed line? The full genetics page →
The Watermelon Z universe
If Watermelon Z is your strain, you answer every bell, you never hurry the river, and you never quite pick a bank. Meet the Ferry Pilot.
