Cannabis seed collection
High THC cannabis seeds in New Zealand
High THC seeds are for growers who want the most potent result their patch can produce. This range collects strains that consistently test above 20% THC, with several pushing past 25% under good conditions, in feminised and autoflower form. Potency isn't only genetics: New Zealand's strong UV and long summer days give these strains the light intensity they need, which is why a well-placed outdoor grow in Gisborne, Nelson or Central Otago can rival indoor results. Each listing shows the tested THC range, the terpene profile that shapes the effect, and how the strain copes with wind and damp, so you can choose strength that also finishes cleanly. Expect dense, resinous flowers that reward careful drying and curing.
Cannabis seed results
$100 OG
$100 OG is a feminised hybrid cultivar listed with OG Kush genetics and a reported THC range of 18–24%.
13 Dawgs
13 Dawgs is a feminised hybrid cultivar documented as Chemdawg x G13, with earthy and sweet flavour descriptors.
24K Gold
24K Gold feminised seeds are indica-leaning, with orange, citrus, sweet and earthy flavours. Suited to temperate or hot, dry climates.
From $79.00
501st OG
501st OG is a feminised hybrid cultivar with Rare Dankness #1 and Skywalker OG lineage, described with earthy and pine flavours.
5th Element
5th Element is a feminised, indica-phenotype cultivar associated with Blackberry genetics and an earthy flavour profile.
5th Element Auto
5th Element Auto is an autoflower cultivar associated with Blackberry genetics, an indica phenotype and an earthy flavour profile.
707
707 is a feminised hybrid cultivar described as OG Kush x Sour Diesel, with an earthy profile and listed THC of 19–21%.
8 Ball Kush
8 Ball Kush is a feminised, Afghani-lineage cultivar with a reported indica phenotype and earthy, pine and spicy notes.
9 lb Hammer Auto
9 lb Hammer Auto is an autoflower seed type with listed Hell's OG x Jack the Ripper genetics and citrus, earthy and berry notes.
9 Pound Hammer
9 Pound Hammer feminised seeds offer an indica-dominant profile with berry, grape, citrus and earthy flavours, flowering in 7–9 weeks.
From $99.00
98 Aloha White Widow
98 Aloha White Widow is a feminised hybrid listed as Maui Wowie × Kona Gold, with a reported THC range of 22–23%.
Aberdeen
Aberdeen is a feminised hybrid cultivar with documented Jack the Ripper x Orange Velvet lineage and a stated THC range of 16–22%.
Aberdeen Auto
Aberdeen Auto is an autoflower hybrid profile with documented Jack the Ripper x Orange Velvet genetics and a reported THC range of 16–22%.
Abusive OG
Abusive OG is a feminised, indica-reported cultivar listed with OG Kush genetics, earthy and pine flavours, and 16–20% THC.
Abusive OG Auto
Abusive OG Auto is an autoflower seed type with OG Kush genetics, a reported indica phenotype and earthy, pine notes.
Acapulco Gold
Acapulco Gold feminised seeds offer a sativa-dominant profile with sweet citrus, lemon and fruity flavours, suited to intermediate growers.
From $89.00
Acapulco Gold Auto
Acapulco Gold Auto is a sativa-dominant autoflower seed with earthy pine, sweet citrus and lemon flavours, suited to hot, dry or temperate climates.
From $89.00
Ace Killer OG
Ace Killer OG is a feminised cultivar with documented White Fire OG and Kosher Kush parentage, plus earthy and pine notes.
Ace Killer OG Auto
Ace Killer OG Auto is an autoflower cultivar with White Fire OG x Kosher Kush lineage and reported earthy and pine notes.
Ace of Spades
Ace of Spades is a feminised, indica-reported cultivar documented as Black Cherry Soda crossed with Jack the Ripper.
Ace of Spades Auto
Ace of Spades Auto is an autoflower cultivar with a reported indica phenotype and a sweet, earthy, berry and citrus profile.
Afcrack
Afcrack is a feminised hybrid cultivar documented as Green Crack × Afgoo, with reported citrus and berry flavour notes.
Afghan Big Bud
Afghan Big Bud is a feminised, indica-profile cultivar with documented Afghani x Big Bud lineage and a sweet flavour descriptor.
Afghan Big Bud Auto
Afghan Big Bud Auto is an autoflower cultivar with documented Afghani x Big Bud genetics and a reported indica phenotype.
Afghan Hawaiian
Afghan Hawaiian is a feminised, indica-described cultivar with documented Lavender x UK Cheese genetics and citrus and berry notes.
Afghan Hawaiian Auto
Afghan Hawaiian Auto is an autoflower cultivar described as indica, with documented Lavender × UK Cheese lineage and citrus and berry notes.
Afghan Kush
Afghan Kush feminised photoperiod seeds are a pure indica landrace with earthy, herbal, pine and spicy flavours, flowering in 7–8 weeks.
From $99.00
Afpak
Afpak is a feminised cultivar listed with Afghani genetics, a reported hybrid phenotype, and earthy, pine and sweet notes.
Agent Orange
Agent Orange feminised seeds are a sativa-dominant photoperiod hybrid with sweet orange and citrus flavours, suited to intermediate growers.
From $89.00
Agent Tangie
Agent Tangie is a feminised hybrid cultivar described by citrus and spicy flavours, with listed THC of 17–23% and CBD of 0–1%.
Agent Tangie Auto
Agent Tangie Auto is an autoflower hybrid profile associated with citrus and spicy notes, with supplied THC and CBD figures.
AK-47 Auto
AK-47 Auto is an autoflowering hybrid with a balanced, slightly sativa-leaning profile and pungent, herbal and sweet flavours.
From $79.00
Alaskan Ice
Alaskan Ice is a feminised, sativa-described cultivar documented as Haze crossed with White Widow, with an earthy flavour profile.
Alaskan Thunder Fuck
Alaskan Thunder Fuck feminised seeds have a sativa-dominant profile, with pine, citrus and sweet flavours and a 7–9 week flowering period.
From $89.00
Alchemy
Alchemy is a feminised hybrid cultivar described as Chemdawg x Querkle, with sweet berry notes and a reported THC range of 10–24%.
Alien Bubba
Alien Bubba is a feminised cultivar documented as Bubba Kush crossed with Alien Kush, with an earthy flavour description.
Alien Bubba Auto
Alien Bubba Auto is an autoflower cultivar with documented Bubba Kush x Alien Kush lineage and an earthy flavour profile.
Alien Kush
Alien Kush is a feminised, indica-reported cultivar with documented Alien Dawg x LVPK lineage and earthy, pine aroma notes.
Alien Kush Auto
Alien Kush Auto is an autoflower cultivar with documented Alien Dawg x LVPK lineage and earthy, pine-like flavour descriptors.
Alien Mints
Alien Mints is a feminised hybrid associated with Animal Mints, with reported THC of 20–28% and CBD of 0–1%.
Alien OG
Alien OG feminised seeds offer a balanced photoperiod hybrid with pine, lemon, earthy and sweet flavours, suited to intermediate growers.
From $79.00
Alien Reunion
Alien Reunion is a reported hybrid from Alien OG and Alien Dawg, listed as a feminised seed type with 17–24% THC.
Alien Reunion Auto
Alien Reunion Auto is an autoflower hybrid listed with Alien OG x Alien Dawg genetics and reported THC of 17–24%.
Alien Rift
Alien Rift is a feminised cultivar documented as Alien OG x Alien Dawg, with citrus and earthy flavour notes.
Alien Rift Auto
Alien Rift Auto is an autoflower cultivar with documented Alien OG x Alien Dawg lineage and citrus and earthy descriptors.
Alien Walker
Alien Walker is a feminised hybrid cultivar documented as Albert Walker × Tahoe Alien, with citrus and earthy flavour notes.
Allen Wrench
Allen Wrench is a feminized cultivar with documented Trainwreck x NYC Diesel lineage and a reported sativa phenotype.
Alpha Blue
Alpha Blue is a feminised, sativa-described cultivar with documented NYC Diesel x Blue Dream lineage and citrus and berry flavours.
How to choose high THC seeds
Don't chase the single highest number. The gap between a strain that tests 24% and one that tests 27% is far smaller than the gap between a well-grown and a poorly grown plant of either. Filter instead for strains whose structure suits your region — many of the most potent modern strains are dense, resinous indica-dominant hybrids that rot in a humid Auckland March, so northern growers should look at the high-THC sativa hybrids and open-structured Haze crosses in this range, while growers in sunny, drier Gisborne, Nelson and Central Otago can take the dense ones. Then read the terpene profile: a 25% strain heavy in myrcene and a 25% strain heavy in limonene are very different experiences. Finally, check flowering weeks. Potency peaks at full maturity, and a strain that can't finish before your autumn rain will never hit its number.
Growing high THC seeds in New Zealand
Three things drive potency once you've chosen the genetics: light intensity, harvest timing and post-harvest handling. New Zealand's UV is among the strongest in the world for its latitude, and full-sun positions with eight or more hours of direct light produce measurably more resinous flower. Harvest timing is where most growers lose potency: THC peaks when the majority of trichomes are cloudy with the first amber appearing. Every week past that trades THC for a heavier, sleepier effect — and in a Kiwi autumn, every week past that also risks rot.
| Region | Best-suited high-THC types | Watch for |
|---|---|---|
| Northland, Auckland, BoP | Sativa-dominant hybrids, Haze crosses, open Cookies-family strains | Bud rot in dense colas; harvest before the wet |
| Gisborne, Hawke's Bay, Nelson, Marlborough | Dense indica hybrids, OG and Kush lines — ideal | Late-finishing strains vs April rain |
| Wellington, Taranaki, Manawatū | Compact potent hybrids; stake well | Wind damage to heavy colas |
| Canterbury, Otago, Southland | Fast-version high-THC strains, potent autos | Finishing time; frost |
Feed generously in flower — high-THC hybrids are heavy feeders — but flush with plain water for the last 10 to 14 days. Dry slowly in a room with a dehumidifier; a fast, warm dry destroys more potency and flavour than any mistake in the garden. Cure in jars for at least four weeks.
If you want potency with a softer edge, the CBD seeds range includes balanced strains. when to harvest cannabis trichomes nz shows when resin peaks, and drying curing cannabis nz protects it through a damp autumn.
Cannabis seed collection
Frequently asked questions
What THC percentage counts as high?
Above about 20% is high; strains above 25% are at the top end of what's achievable. Growing conditions, harvest timing and curing shape the final number as much as genetics do.
Do high-THC strains need more light or nutrients?
They need full sun or strong indoor light to reach their potential, and most feed heavily in flower. Genetics set the ceiling; your light, feeding and harvest timing decide how close you get.
Are high-THC strains harder to grow?
Not necessarily. Several of the strongest strains here are also among the sturdiest, with good wind tolerance and mould resistance. Check the difficulty rating on each listing.
Will my outdoor plant reach the THC percentage on the listing?
The listed range is what the strain achieves under good conditions. Full sun, correct harvest timing and a careful dry and cure get you there; shade, early harvest forced by rain, or a fast dry land you below it.
Does New Zealand's UV increase THC?
There's reasonable evidence that UV-B exposure increases resin production as the plant protects itself, and New Zealand's UV is unusually strong. It's one reason well-grown outdoor Kiwi flower can match indoor potency.
Which is stronger, indica or sativa?
Neither, by definition. THC content is a property of the individual strain, not the type. This range includes very potent strains of both, and the most potent modern strains are usually hybrids. ---