Willow water explained

Willow water is a traditional method to extract the rooting hormone indolebutyric acid from willow (Salix) trees, which is believed to be present in sufficient quantities to stimulate root growth.^{[1] [2] [3] [4]}

Notes and References

1. Ohio State University Extension, Web site: Gardening Folklore.
2. http://www.gardeningknowhow.com/gardening-how-to/making-willow-water.htm Tips On How To Make Willow Water
3. http://www.texasroserustlers.com/app/download/756079114/Prop+-+WillowWater.pdf Using Willow Water to root Rose cuttings
4. http://www.bonsai4me.com/AdvTech/ATwillow%20water.html Willow Water for Bonsai