Transplanting

I started some plants outdoor and they are about 1 1/2 to 2 1/2 inches tall, and they are on theyre 3 rd set of leaves (including the round ones) they are in 6 packs on my roof, and Im not 100 percent positive when to transplant them into 5 gallon buckets int the wild. Can you help me out? Thanks.

As soon as you see roots trying to get out of the bottom is a good sign that you have a firm enough root ball for an easy transplant. They should be OK in the six packs until they are almost root bound but for most vigor transplant a bit before that. If you transplant when they are too small one bug could ruin your grow. You may want to consider a small cage for them if they're going out when real small. Good luck and good growing.