I use a product called Rooting Hormone manufactured by Green Light. It is a powder. You make the cuts, wet the stem, dip it in the hormone, and I put it in 1" rockwool cubes, and soak them. Then I put them under a small light and BAM, I have my ladies for my next crop. It cost me a whole $3.99, and have never had a problem with it. I was going to buy the liquid for $14.00, but my buddy said it wouldn't make a difference and he is right. It really doesn't. Very simple directions, you can get it any any hydro store around pretty much, or something similar.