you need to look up your frost tables, and your sun tables, sun tables are basic spring to octoberish, but your frost tables can fuck you up, just because its sunny doesnt mean you cant have cold frost in the morning that will be bad. as for the seedling you got growing now just leave it tend it and tuck it in at night, when you get around spring time then you should start since your in sunny place try to get a sativa dominate strain because your flowering time will be longer and you said it stays sunny.
so do two things before you can find out when you can grow.
you need about your sun table almanac
and you need to find out when the last frost is expected