well june is technicly only a third over, you have plenty of time left, even though it can seem like it's taking forever, those plants in the picture almost doubled in height in a week, and im expecting another 6 inches by tomorow when i come back out for updates and watering. once they pass the first 3 sets of leaves or so they start to go from there seedling stage with fairly slow growth to the "veggitative stage", now they will be popping out branches and growing up to 6 inches every day as they get bigger! that is all nothing compared to just a week or two before flowering when the females stretch an extra foot right before they begin to halt upward growth and start to fill out the lower branches and soon the buds as well. I have tried many cloning powders and jells, and have had a horrible time with most, i did find one powder that works well, though i don't remember it's name, and one gell, Olivia's Cloning Gel, so far it's the best stuff i have ever tried and since then have never looked back, i don't think you will find a decent cloning gell or powder at home depot, your local grow shop will have it, you can get it online, or look for it in your local greenhouse, just make sure it's not for woody stemmed plants like pine saplings, that stuff WONT work. as for those plants, i am not going to be cloning them, because i am not convinced that would increase the yield at all, though i might play around with one plot and try just to find out, but if you are detirmined to clone them, wait till they are bigger, in 2 weeks from now, once they are knee high, they will suffer much less shock over losing a growth tip as they would right now, for a plant that size, it would be like starting over, and could severely mess with your yields.