The best autoflower seeds for Ontario growers, compared across 33 verified seed banks shipping to ON. Prices in CAD.
Quick Answer
Autoflower cannabis seeds are available for Ontario growers from 33 verified seed banks on Seennabis, shipping to ON in CAD. Autoflower seeds are the safest bet for short or unpredictable seasons — they finish on a fixed 8–11 week timer regardless of daylight. Ontario's longer season (about 150 frost-free days) supports full-cycle grows. The legal age in Ontario is 19+ with home growing of up to 4 plants permitted.
Autoflower seeds go from seed to harvest in just 8–11 weeks without any light schedule changes. Modern autoflowers from Fast Buds, Dutch Passion, and Royal Queen Seeds now hit 24–28% THC and rival photoperiod yields. For Ontario specifically, excellent outdoor province — southern Ontario supports full-season photoperiods; watch September bud rot in humid years. Autoflower genetics are the safest bet for short or unpredictable seasons — they finish on a fixed 8–11 week timer regardless of daylight.
Start indoors late April, transplant outdoors after the last frost (mid-to-late May in the south, early June further north). Photoperiods finish late September to mid-October; autoflowers fit two stacked runs in the south.
autoflower · 40-60% THC · 8-10 weeks
$7.64/seed · Blimburn Seeds
autoflower · 40-60% THC · 8-10 weeks
$7.64/seed · Blimburn Seeds
autoflower · 40-60% THC · 8-10 weeks
$7.64/seed · Blimburn Seeds
autoflower · 40-50% THC · 7-8 weeks
$7.64/seed · Blimburn Seeds
autoflower · 16-20% THC · 9-11 weeks
$3.63/seed · Nirvana Seeds
feminized · 20-25% THC · 7-8 weeks
$7.64/seed · Blimburn Seeds
autoflower · 40-50% THC · 8-10 weeks
$7.64/seed · Blimburn Seeds
autoflower · 40-50% THC · 8-10 weeks
$7.64/seed · Blimburn Seeds
autoflower · 40-50% THC · 10-12 weeks
$7.64/seed · Blimburn Seeds
Autoflower seeds are the safest bet for short or unpredictable seasons — they finish on a fixed 8–11 week timer regardless of daylight. Ontario's longer season (about 150 frost-free days) supports full-cycle grows, so autoflower seeds can work well when matched to the local season and your setup.
All 33 verified seed banks on Seennabis ship autoflower seeds to Ontario with CAD pricing and germination guarantees. Compare prices on the picks above or the full autoflower category.
Yes — buying cannabis seeds is legal for adults 19+ in Ontario. Up to 4 plants per residence for personal use.