You can root green ones easiest if you do them like a small tip cutting and make a little humidity dome for them. I use the tall take out chinese soup clear container. Put perlite in the bottom few inches with holes in the lid and the bottom and water it well then put the lid on and watch for roots. When you start seeing them crack the lid open a little more each day until its off then you can transfer it to a little pot. You can use the little mini greenhouse things too but you might want to do it in a bright window if its really hot outside or at least in the shade. If they are pretty firm and not wimpy green you won't need to lid but use rooting hormone on the green ones. Its not too late to start seeds as long as you can keep them growing over the winter the first year.