Prepare a section of willow with good growth, peel off the leaves on it, cut it into small sections, and soak it in water for one night. After that, pour out the supernatant and dilute it with some water, then it can be used as rooting water. It is also very simple to use, the bottom of the cuttings down, into which bubble one night.
Because there are a lot of salicylic acid in the water of willow branches, they can promote cell division, so as to promote the cell division at the bottom of cuttings, so as to grow young roots.
