Watermelon Runtz by Silent Seeds

Watermelon Runtz strain photo
Type mostly indicaFlower ±60 daysCross Watermelon Zkittlez × Runtz

A indica-leaning cross of Watermelon Zkittlez × Runtz, Watermelon Runtz — released by Silent Seeds — shows up in a lot of tents for good reason. Indoors it typically finishes flowering in around 60 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Watermelon Runtz grows against.

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Similar strains

CookielatoSilent Seeds · ±60 daysZkittlez 2.0Silent Seeds · ±60 daysOG KushSilent Seeds · ±55 daysStarfire OGSilent Seeds · ±56 daysGorilla FrostSilent Seeds · ±60 daysL.A. Vanilla CakeSilent Seeds · ±63 daysAuto Cream MassMr. Hide · ±60 daysAuto Kritical RedMr. Hide · ±60 daysBlueberry CheesecakeDawg Star · ±60 daysChemdog GorillaExpert Seeds · ±60 daysChemdog MillionaireDr. Krippling · ±60 daysChemical XBeyond Top Shelf · ±60 daysAll Silent Seeds →
BreederSilent Seeds
Typemostly indica
Flowering time±60 days
EnvironmentOutdoors
LineageWatermelon Zkittlez × Runtz

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🧬 Explore the family: Watermelon Zkittlez · Runtz

Ancestry Pedigree

Watermelon Zkittlez
Dying Breed Seeds
Unknown Strain
Original Strains
OG Eddy Lepp
Unknown or Legendary
OG Kush
Clone Only Strains
Unknown Strain
Original Strains
Hindu Kush Indica
Original Strains
Grape Ape
Apothecary Genetics
Grand Daddy Purple
Unknown or Legendary
Purple Urkel
Clone Only Strains
Mostly Indica
Original Strains
Big Bud
The Seed Bank
USA Indica
Original Strains
Purest Indica
Clone Only Strains
Afghani
Unknown or Legendary
Afghani
Unknown or Legendary
Afghanistan Indica
Original Strains
USA Indica
Original Strains
Runtz
Unknown or Legendary
Zkittlez
Dying Breed Seeds
Grape Ape
Apothecary Genetics
Indica Sativa
Original Strains
Unknown Strain
Original Strains
Gelato
Unknown or Legendary
Gelato
Sherbinskis
Sunset Sherbert
Unknown or Legendary
Girl Scout Cookies
Clone Only Strains
Pink Panties
Unknown or Legendary
OG Kush
Clone Only Strains
Burma Sativa
Original Strains
OG Kush
Clone Only Strains
Girl Scout Cookies
Clone Only Strains
F1 Durban
Unknown or Legendary
F1
Unknown or Legendary
Unknown Strain
Original Strains
Durban Poison
Unknown or Legendary
South Africa Sativa
Original Strains
OG Kush
Clone Only Strains

Growing Watermelon Runtz: what to expect

As an indica-leaning plant, expect a modest stretch after the flip (roughly 50–100%) and dense bud structure — which makes late-flower humidity discipline the main risk: keep RH in the 40s once buds fatten to stay ahead of mold. Growers familiar with Watermelon Zkittlez or Runtz will recognize much of its behavior. Whatever the listing says, the cut in YOUR tent is the ground truth: log feedings, readings, and photos, and let the trends — not the label — drive decisions.

Watermelon Runtz FAQ

How long does Watermelon Runtz take to flower?

Watermelon Runtz typically flowers in around 60 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.

Is Watermelon Runtz an indica or a sativa?

Watermelon Runtz is listed as mostly indica.

What are the parents of Watermelon Runtz?

Watermelon Runtz was bred from Watermelon Zkittlez × Runtz by Silent Seeds.

What environment does Watermelon Runtz like?

Standard cannabis bands work well: VPD 0.8–1.1 kPa in veg and 1.0–1.4 kPa in flower, with humidity stepping down from 65–75% as a seedling to 40–50% in late flower. See the stage-by-stage table on this page.

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Facts compiled from public breeder listings. Growing Watermelon Runtz? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.

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Published by Cultivar (logmygrow.com), a structured grow journal. These reference bands are the same ones the app grades real grows against. Free to cite with a link. Some outbound product links are affiliate links — see disclosures.