blue widow from theseedfair.com was earliest to flower this year(around aug 12) along with vortex and 9lb hammer also from there. i’ll be excited to cross some kush mints with them this year (from worldsstrongest).
(sonic from natural homegrown wonders is budding nicely too. good photoperiod sensitivity for canada)
I did a run of blueberry this year and the results were surprising cropking.com had some of the better looking tastes and flowered at 13 hours and 8 deg C.
turns out that amsterdam is very similar in lighting because of the latitude in canada so seeds from there should also work well in canada. (thedutchseedshop)(tried some already and they worked well) for early flowering plants.
not all strains work well in canada im finding out even in 5 gallon pales(they get huge still with a few holes in them) (so autoflowers are a really great choice still).