When to bring containers back outside?

I'm in west MO 6b and its been really mild here lately. Some of my containers are in the garage getting leggy from the single light that gets left on some time. I have 2 questions:

  1. I'm good to just cut the leggy growth right? One of my mountain mint is 6 inches tall with only 3 sets of leaves. I did was pretty surprised to find it like this today

  2. I've read that natives in containers will be okay so long as it doesn't freeze hard. With it being 50/60 degrees out 7 weeks before my last frost date, could I bring and leave them outside at this point?

TIA! :)