Every June (in zone 5 Illinois) I root Rosemary in water. Cut some 8" branches- strip 3" of leaves and put in a container of 3" deep rainwater. Leave in dappled sunlight (under a tree). In a few weeks they will have plenty of roots. Remember to change the rainwater so that you don't grow mosquitoes.
I have also grow them in soil. Again cut some 8" branches- strip 3" of leaves -then sprinkle with rooting powder. Poke 3" holes with a pencil -in your potting soil in the container of your choice. Important - Carefully place the rosemary cutting in the hole then push the soil from the side to secure the cutting. The idea is to not rub off the rooting powder.
I am not sure why your cuttings turn black - it has happened to me a few times. I would guess it was too humid or too cold. Please try again this summer!
Every June (in zone 5 Illinois) I root Rosemary in water. Cut some 8" branches- strip 3" of leaves and put in a container of 3" deep rainwater. Leave in dappled sunlight (under a tree). In a few weeks they will have plenty of roots. Remember to change the rainwater so that you don't grow mosquitoes.
I have also grow them in soil. Again cut some 8" branches- strip 3" of leaves -then sprinkle with rooting powder. Poke 3" holes with a pencil -in your potting soil in the container of your choice. Important - Carefully place the rosemary cutting in the hole then push the soil from the side to secure the cutting. The idea is to not rub off the rooting powder.
I am not sure why your cuttings turn black - it has happened to me a few times. I would guess it was too humid or too cold. Please try again this summer!