I only buy regular seeds, because the only time I buy seeds is when I want to do some breeding as my mother room is filled with all my keepers. But when I do a seed run, I germinate a whole pack or sometimes up to 3 packs if I have the room, then at about 4 weeks, I top them all, and they are usually at node 6 by then, but I top them at node 4, and I use that top to see what I got, is it male or female? And if she is a female, that top goes into a small tent where I keep all the female tops from my current grow, and in there they will all reveg under a very small amount of light. And if they are males, I will simply kill them off as I already have the only breeding males I want to keep! Then I grow out all the females that I previously topped at the 4th node to see if there are any worth doing some mad scientist stuff to, LoL! And if they aren't worth a damn I will kill off the top clone that I pulled from her at the end of week 4. But if I get lucky and find a good one, which is very, very, very rare, I will pull some clones from the top clone and do 1 self, so I can have some female seeds from her and then do some breeding with the other clones.