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. Ohio State University Extension, Tips On How To Make Willow Water Gardening Know How Using Willow Water to root Rose cuttings Texas Rose Rustlers. Pamela Ashworth Puryear. 1986 Willow Water for Bonsai Bonsai4me
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