How do you clone sunflowers?

They clone very easily. Just take a sharp knife and cut off a shoot growing above a large leaf at a 45deg angle. Dip in rooting hormone. I use a homemade cloning machine that mists the cutting 24/7 and in about 7 days you have roots. I am trying a leaf cutting. Looks like it is rooting witch will set me get a lot more clones off one plant.