Star Killer by United Cannabis Seeds

Star Killer strain photo
Type mostly indicaFlower ±64 daysCross Star Killer × Star Killer

3 other breeders' versions of Star Killer — compare flowering times side by side →

Star Killer is one of those heavy-hitting indicas that commands respect the second you see it in the flower room. Originally bred by Scott 'Moonshine' Ostrander over at Rare Dankness, the genetics are a brutal collision of Skywalker OG and their elusive Rare Dankness #2 male. It stacked up Cannabis Cup and THC Championship trophies like it was nothing between 2014 and 2016. But tracking down those exact beans can be a chore, so the version from United Cannabis Seeds has become a go-to for guys wanting to pull down those same knockout phenotypes without spending a year on waitlists. It’s feminized, runs about 64 days, and throws down the kind of resin that’ll gunk up your trimming scissors in ten minutes flat.

When you put Star Killer in the dirt, you quickly realize she’s built like a tank. The node spacing is tight, and the buds pack on weight so aggressively in late flower that you'll absolutely need to trellis or stake the branches, otherwise they'll snap under their own mass. Growers over on THCFarmer often mention the color shift—if you drop your night temps in the last couple of weeks, she bleeds out these gorgeous deep purple hues that make the trichomes look like crushed glass. But you've got to watch your environment. Push the feed too hard or stress her with heat, and she might throw a foxtail or a stray nanner, so keeping your VPD dialed is crucial.

As for the smoke, Star Killer isn't something you roll up before a busy day. This is pure, unadulterated nightcap material. The nose is that classic OG profile—pine, earth, and a sharp lemon-fuel bite that burns the nostrils in the best way possible. The high hits the body like a heavy blanket, melting away chronic pain and insomnia. It's the kind of sedative punch that seasoned smokers keep in their stash for when everything else stops working. Whether you're running the United Cannabis cut or hunting through old stock, finding a keeper pheno of Star Killer means you'll probably never need another sleep aid.

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Similar strains

Blue MoonrocksUnited Cannabis Seeds · ±60 daysMaster KushUnited Cannabis Seeds · ±64 daysShishkaberryUnited Cannabis Seeds · ±64 daysZkittlez AutoflowerUnited Cannabis Seeds · ±84 daysAcapulco GoldUnited Cannabis Seeds · ±80 daysNorthern Lights AutoflowerUnited Cannabis Seeds · ±84 daysCritical ManFamily Ganjah · ±64 daysFat AxlPua Mana · ±64 daysFire Alien StrawberryOG Raskal · ±64 daysHubble BubbleMandala · ±64 daysMeringueDutch Passion · ±64 daysNorthern Lights XGenehtik Seeds · ±64 daysAll United Cannabis Seeds →
BreederUnited Cannabis Seeds
Typemostly indica
Flowering time±64 days
EnvironmentOutdoors
LineageStar Killer × Star Killer
DescendantsMadCat's Backyard Stash - Crash OG, MadCat's Backyard Stash - Killer Critical Jack, Nasty Woman, Wet Lulu, Star Killer, Skywalker OG, MadCat's Backyard Stash - Killer Prom Queen, Rogue One, Silver Star 1, MadCat's Backyard Stash - Liberty Star, Uncle John's Headband, Star Killer, Purple Punch OG, YOINK!, Mjölnir, Killer Cookies, MadCat's Backyard Stash - Killer Nightmare OG, Killer Afghan Skunk, Purple Soda OG, Holy Smoke Seeds - OG Strawberry Starkiller, Dark Overlord, Wedding Ring, Vetitum, Uncle Ebenezer, Cancer Killer OG, Star Killer, DankGod, Black Limes Matter, Ziggy Star Dust

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🧬 Explore the family: Star Killer · Star Killer · MadCat's Backyard Stash - Crash OG · MadCat's Backyard Stash - Killer Critical Jack · Nasty Woman · Wet Lulu · Star Killer · Skywalker OG · MadCat's Backyard Stash - Killer Prom Queen · Rogue One

Ancestry Pedigree

Star Killer
Rare Dankness Seeds
Skywalker OG
Clone Only Strains
OG Kush
Clone Only Strains
Unknown Strain
Original Strains
Hindu Kush Indica
Original Strains
Rare Dankness Nr2
Rare Dankness Seeds
Ghost OG
Clone Only Strains
OG Kush
Clone Only Strains
Rug Burn OG
Rare Dankness Seeds
Ghost OG
Clone Only Strains
Rare Dankness Nr1
Rare Dankness Seeds
Triangle Kush
Clone Only Strains
Chemdog
Unknown or Legendary
Indica Sativa
Original Strains
Chemdog D BX2
Reservoir Seeds
Chemdog
Unknown or Legendary
Chemdog D BX1
Reservoir Seeds
Chemdog
Unknown or Legendary
Chemdog D Kush
Reservoir Seeds
Chemdog
Unknown or Legendary
Hindu Kush
Sensi Seeds
Northern Lights Nr2 F3
The Seed Bank
Northern Lights Nr2
The Seed Bank
Purest Indica
Clone Only Strains
Afghani
Unknown or Legendary
Afghani
Unknown or Legendary
Afghanistan Indica
Original Strains
Triangle Kush
Clone Only Strains
Star Killer
Rare Dankness Seeds

Growing Star Killer: 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 Star Killer or Star Killer 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.

Star Killer FAQ

How long does Star Killer take to flower?

Star Killer typically flowers in around 64 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.

Is Star Killer an indica or a sativa?

Star Killer is listed as mostly indica.

What are the parents of Star Killer?

Star Killer was bred from Star Killer × Star Killer by United Cannabis Seeds.

What environment does Star Killer 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 Star Killer? 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.