Kinda worried

my plants just started budding a week a go and in Ohio the nights are getting pretty cold and im kinda worried, how much longer should they take and should i worry about the cold? theyre growing outside.

i germinated about 7 seeds and only one tap rooted, should i wait longer, its been about 4 days.

'The nights are getting pretty cold'....I notice nobody responded to your post. O.K. clue up on the climate in your area. Do you get frosts in September ? Does it snow ? MJ plants are very tolerent of cold weather and even the odd light frost or two. If your plants started budding a week ago (pics ?) then I would say they've been in flower since mid-August, so figure an early to mid-October finish. Hows the Ohio weather in early October ?
Only one plant tap-rooted ? Whats that mean ? Whats been about 4 days ?
Confusing post...thats why nobody answered you.