not understanding how you germinated them and saw the roots unless you did it in a paper towel and then put in soil when you saw the root tip? Anyway, the plants can stay outside 24/7, just make sure they stay moist(not soaking wet) while they're so tiny and keep an eye on them to make sure they don't fry in the sun at first. Other than that don't fiddle around with them too much and don't watch them like a hawk or it'll be like waiting for water to boil. Peace, man.