I've had problem with propgating my Coleus by cutting. What I did was I cut the coleus plant (about 4 inches) and I removed the leaves, except the top ones, then put the cutting into water and use a plastic bag to cover the container to keep the humidity; but I've never been successful yet. How to do it right?

Take your 4" cutting and remove all folige from the bottom half. Make sure you get a good clean square cut. Dip the end of the cutting in rootone and stick in moist pearl lite. Keep it the pearl lite moist until roots are on the cutting and you transplant into soil.