Willow tea water in which willow cuttings have soaked is an effective growth stimulator. You might want to try soaking seeds of woody plants in willow tea before planting. It will not take the place of acid scarification, though. It also works as rooting stimulator for softwood or hardwood cuttings. To make, soak 5 or 6 stems (6”-8” long) in water overnight. Then soak the cuttings in the willow water for an hour or so before putting in the propagation medium.