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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.
How to Prune Lavender - Cut back in Late Winter or early spring as close as possible to old wood without cutting into the old wood; leave a few healthy leaves above the brown stems (plants won't produce new shoots from old wood). In Late Summer after flowering, remove all the old flowerheads to prevent plant from using energy to make unwanted seed.