Hi you live in northern hemisphere=?
and well i have no clue how your weather conditions are.
Weed grows under nearly every condition. But giving them perfect ones, they thrive.
in the earlier ddays i started my outdoors very early too... and it just takes longer, because the daytime is short and its quite cold
But as soon as the sun comes out and days get friendly, tthe plants go in overdrive
Choosing the right genetics for outdoor is another crucial point, iam only planting fast flowring// express genetics, to get ready latest in 3 rd week of september, before the big rin starts
This is how I do it nowadays
I prepare the Plantholes ( i did them in ground) in digging very deep and loosing the growund, i mix thee soil from my indoors, into the gardensoil
and i enrich with Cowshitpellets and Hornmeal
and let it sit until may
Paralleel i pregrow my outdoor Plants ( the photoperiods) indoors, for 4-6 weeks and Plant them outdoors mid of may ( after a few days acclimating)
you can look into my outdoor diaries, i made some tutrials too
But back to you..... if they are in growpots, take them to the warmest place in garden , protect them alittle, or if possiblle take them indoors under the lights
Otherwise , just keep them into your eyes, protect them from cold, heavy rain...