Strongest Strains
Strongest Strains are cultivars bred for the most potent genetics in the catalog, testing 27%+ THC. Royal King Seeds USA stocks 78 strongest cannabis strains, including grower favorites like Mac 1, RS11, High Resin Pack, every one shipped discreetly to all 50 states with a 95% germination guarantee. Below you'll find the full lineup with THC, effects, and flowering time, plus what to look for when choosing strongest genetics.
78 Strongest Strains to Buy
HybridAutoMac 1
27 THC · Auto
From $14.99
IndicaRS11
27 THC · Photo
From $12.49
HybridHigh Resin Pack
18-27 THC · Photo
From $29.99
IndicaKiller
27 THC · Photo
From $11.99
Sativa5 Alive
29 THC · Photo
From $14.99
HybridBugatti
27 THC · Photo
From $15.99
HybridArea 51
27 THC · Photo
From $10.99
HybridGuptilla
29 THC · Photo
From $11.99
IndicaVader OG
27 THC · Photo
From $11.99
HybridGelato 44
27 THC · Photo
From $13.49
HybridGrape Gas
28 THC · Photo
From $13.99
IndicaTigermelon
27 THC · Photo
From $13.99
IndicaGrape Soda
30 THC · Photo
From $10.99
HybridSour Alien
27 THC · Photo
From $12.99
HybridAutoGorilla Glue #4
28 THC · Auto
From $11.99
IndicaDosi Punch
28 THC · Photo
From $15.49
HybridBlue Zushi
28 THC · Photo
From $15.49
IndicaExtreme OG
27 THC · Photo
From $15.49
SativaBear Dance
33 THC · Photo
From $11.49
IndicaBlack Widow
27 THC · Photo
From $11.49
HybridJungle Lava
28 THC · Photo
From $11.49
HybridGeorgia Pie
27 THC · Photo
From $11.99
HybridApple Mintz
27 THC · Photo
From $14.99
IndicaBlue Knight
27 THC · Photo
From $13.49
IndicaPure Indica
27 THC · Photo
From $15.99
HybridApple Betty
33 THC · Photo
From $13.99
SativaLiberty Haze
29 THC · Photo
From $10.99
IndicaYoda’s Brain
27 THC · Photo
From $12.99
HybridSeattle Blue
27 THC · Photo
From $12.99
SativaCrystal Coma
30 THC · Photo
From $11.99
HybridDank Sinatra
28 THC · Photo
From $13.99
IndicaGator Breath
27 THC · Photo
From $15.99
IndicaSkunk Diesel
27 THC · Photo
From $12.99
IndicaRuntz Muffin
29 THC · Photo
From $13.49
HybridIron Triangle
28 THC · Photo
From $11.49
IndicaHells OG Haze
33 THC · Photo
From $13.49
HybridSticky Dickie
27 THC · Photo
From $14.99
HybridL.A. Sunshine
27 THC · Photo
From $12.99
HybridGreen Line OG
29 THC · Photo
From $14.49
HybridRoyal Gorilla
27 THC · Photo
From $13.49
HybridApple Fritter
28 THC · Photo
From $14.49
HybridCookie Breath
31 THC · Photo
From $12.49
HybridGrease Monkey
31 THC · Photo
From $11.99
HybridOriginal Glue
30 THC · Photo
From $11.99
SativaAmherst Diesel
27 THC · Photo
From $13.99
IndicaNorthern Wreck
28 THC · Photo
From $14.99
IndicaChocolate Kush
28 THC · Photo
From $15.99
HybridCookies Gelato
28 THC · Photo
From $13.49
HybridStrawberry Gary
27 THC · Photo
From $12.49
IndicaCritical Purple
27 THC · Photo
From $9.99
IndicaAutoPeanut Butter Breath
28 THC · Auto
From $11.49
HybridGodzilla Cookies
27 THC · Photo
From $12.49
IndicaGrandmommy Purple
33 THC · Photo
From $15.99
HybridFour Star General
30 THC · Photo
From $11.49
IndicaStrawberry Gorilla
27 THC · Photo
From $9.99
HybridDiamond Valley Kush
27 THC · Photo
From $15.49
HybridPeanut Butter Gelato
28 THC · Photo
From $15.99
HybridMaui Pineapple Chunk
29 THC · Photo
From $13.49
Guptilla
29 THC · Auto
From $11.99
Grape Soda
30 THC · Auto
From $10.99
What Makes a Strongest Strain?
Strongest strains are bred for the most potent genetics in the catalog, testing 27%+ THC. THC percentages reflect lab-tested maximum potential under ideal conditions, real-world numbers depend on grow environment, harvest timing, and curing, so expect well-grown phenotypes to land near the top of the range and rushed flower to test lower. High-potency genetics reward experienced growers and higher-tolerance users; if you're new to either, start with a moderate-THC strain before working up.
Strongest Strains FAQ
What are strongest strains?+
Strongest Strains are cannabis cultivars defined by the most potent genetics in the catalog, testing 27%+ THC. Royal King Seeds currently lists 78 of them, spanning indica, sativa, and hybrid genetics in both feminized and autoflower formats.
What is the best strongest strain?+
Popular strongest picks include Mac 1, RS11, High Resin Pack. The "best" choice depends on your grow space, climate, and the effects you want, every strain page below lists THC, flowering time, and effects so you can compare directly.
Can I buy strongest seeds in the USA?+
Yes. Royal King Seeds ships strongest cannabis seeds to all 50 US states with discreet packaging, 3-5 day delivery, and a 95% germination guarantee.