How to care for pistachio sprouts?

I’ve planted pistachio stones 6 weeks ago (in mid sep). I see now that they have sprouted. Should I bring them inside for winter and what are the sun light requirements. I just wanted to know what is the best way to care for them. I live in north Texas(zone 7) and sometime we have snow on the ground and below freezing temperature lasting for a couple of days, but long very hot summers.