The 10 Fastest Cannabis Seeds in Canada (Seed to Harvest in 75 Days)

Jack Herer Autoflower holds the top spot at 75 days seed-to-harvest with surprising consistency across grow conditions. 18% THC, sativa-leaning hybrid effect, and the classic Jack pine-and-spice terpenes. The pick if you want the fastest finish from a real, named strain at value pricing — and the most reliable autoflower for Canadian outdoor growers worried about September frosts.

Northern Lights Autoflower finishes in 75-80 days with classic indica heaviness and dense, frosty flower. 18-22% THC. The lineage has been refined for autoflower performance for over 15 years and the modern version is faster and more potent than the originals. Excellent short-season pick for the Prairies and Northern Ontario.

Lowryder Autoflower is the original autoflower lineage and still one of the fastest finishers at 70-75 days. 15% THC is on the lower end but the speed and stealth advantages (compact 50-70cm plants) make it the pick for micro-grows and short Canadian seasons. Historical and practical value combined.

Blueberry Autoflower finishes in 75-85 days with the classic blueberry terpene profile and 18-20% THC. Cool finishing temperatures bring out blue and purple expression in the calyxes — making this one of the most photogenic fast strains. The cool September nights typical of most of Canada bring out the colour reliably. Beginner-friendly and consistent.

Amnesia Haze Autoflower is the fastest sativa-leaning autoflower we recommend at 80-85 days. 20% THC, cerebral and energetic effect, and the classic Amnesia haze nose. The pick for growers who want a daytime-functional strain on a short cycle.

Cheese Autoflower finishes in 75-85 days with the unmistakable Cheese funk profile. 18-20% THC and a hybrid effect that leans slightly indica. The smell is genuinely loud — plan for carbon filtration in flower. Excellent short-cycle pick for growers who want a distinctive terpene profile.

AK-47 Autoflower finishes in 75-85 days with 18-20% THC and the classic AK hybrid effect. The lineage has been stabilized for autoflower performance over many breeding generations and the modern version is more compact and productive than older releases.

Gorilla Glue #4 Auto finishes in 80-85 days with 22-24% THC — making it one of the fastest high-potency autos in our catalog. Heavy resin coverage, classic GG4 gas-and-pine terpenes, and a hybrid effect that lands harder than the typical auto profile.

Amnesia Haze Feminized is the fastest pure-sativa photoperiod we carry — bloom finishes in 9 weeks (faster than the typical 11-12 for sativas) and total cycle runs 14-15 weeks. 20% THC, classic haze cerebral effect. The pick for indoor growers who want a real sativa on a compressed photoperiod schedule — best run indoors in Canada because outdoor late-October finishes are risky outside coastal BC.

Sour Diesel Feminized finishes bloom in 9-10 weeks (mid-fast for a sativa-leaning hybrid) with 18-20% THC and the classic diesel-fuel terpene profile. Strong yields and a daytime-functional effect. The pick for indoor Canadian growers who want a fast photoperiod with a recognizable, in-demand terpene profile.