Willow tea is a good source of auxins, or natural plant growth hormones. Indolebutyric acid (IBA) and salicylic acid (SA) are highly concentrated in the tips of willow branches. IBA and SA can stimulate root growth and strengthen the overall health of the budding plant; you can make the tea in spring by cutting 2” lengths of willow tips with swollen buds (the hormones are contained in the buds) and soaking them in boiling water until it has cooled. Then strain out the twigs and use the water to soak or as foliar feed by spraying it on leaves during the growing season. Appropriate timing is important when using growth stimulants.
City Farmer: The Willow Tree's Secrets | The Fine PrintThe Fine Print
Or
How to Make a Willow Whistle: 8 Steps (with Pictures) - wikiHow
Give it a try a little experiment and you might discover something positive
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