I do root most cuttings in plain water at least until I see roots starting, then I pot them up and keep them in bright shade. I've never heard of willow water. What is it?
Some things you can just 'stick' a cutting in a pot or in the ground and they will take off. Again, heat, sandy soil and humidity all help that little miracle to happen. Florida is one big greenhouse in the summer, c/w bugs and fungus.