Willow Tea as a Rooting Hormone: Willow bark contains natural plant growth hormones & thus is a FREE easy to make rooting hormone used to propagate plant cuttings. How to make Willow Tea: Collect young twigs/stems of any of willow species with green or yellow bark. Remove all leaves. Cut the twigs into short pieces about 1", & place them in a heatproof container. Cover the cut stems with boiling water, just as you would when brewing tea. Allow the willow and water to steep overnight.
How to make new rose, lavender, and rosemary plants from cuttings & mini-greenhouses. Some plants, like willow, make their own rooting hormones. If you soak willow branch cuttings in water, that infusion encourages rooting as much as expensive root hormone powder does.
Willow branch tips are full of growth hormones in the spring. They may be left in a bucket (whip around occasionally to vortex and oxygenate water, maybe don't spill so much as I do in this photo!) for a week or two. This makes a Willow sun tea that can be used for watering in spring cuttings and seeds, substantially bolstering root formation and quickening germination. After the Willow itself roots out (and it will) you can plant it--each frond will make a clonal tree. Its magic.