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Propogating rosemary and basil - I picked up some sticks of 'fresh' rosemary from the grocery store, trimmed a few inches up from the stick, and stuck in a shot glass of water. We'll see how they do - 2 days in, and they haven't gone limp leaved or brown, so...
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.