I would wait until they were a little bigger and the weather warmer temps at night. Even then you may want to give them a little shade during the hot part of the day until they are rooted. (think cardboard attached to a stick or box w the sides cut out) They will dry out SUPER fast since they have hardly no root. I recommend planting them (when they are ready) outside all together in the same area, some place close to the house so you can check them a couple times a day and water them easily. After they get larger (think another year) then you can move them around to more permanent spots where you want them.
