Salvia is an herb indigenous to the Mazateca region of Mexico. Salvia plants prefer a warm and humid environment, but they can adapt to cooler, less humid conditions. There are many varieties of salvia plants ranging from hardy perennials to annuals that die off in the winter. Salvia grows well in containers or in your garden, in soil with good drainage and lots of light. You can root salvia plant cuttings in water, soil or soil-less planting medium. Start your cuttings 6-8 weeks before the last frost in your area if you plan to plant salvia in your garden.
Slice a cutting from a healthy salvia plant with a new razor. Slicing the plant with a sharp tool is better than taking a cutting with scissors. Scissors crimp the xylem shut which may prohibit water and nutrient transmission. Select a stem that is anywhere from 2 to 8 inches long and make your slice just beneath a node.
Strip the leaves from the bottom 1 to 3 inches of the cutting.
Place your cutting in a jar containing 1 1/2 to 2 inches of water. Place the jar indoors in diffused light. Change the water often to help guard against root rot. If the stem on your salvia cutting begins to turn brown, discard it. Place only one cutting in each jar. Your salvia plant cuttings should have roots in about 2 weeks. Skip to Step 6.
Repeat Steps 1 and 2 if you'd prefer to root your salvia plant in soil or a soil-less medium. Dip the end of the cutting in a rooting stimulator, and then place it into a potting container filled with moistened potting soil or other medium. It's a good idea to insert a pencil into the center of the soil before you insert the plant to avoid rubbing off the root stimulator. Fill in around the stem with more soil.
Cut the bottom out of a plastic soda container. Place the container over the salvia plant to help hold in moisture. Keep the soil moist, but not wet. Your salvia plant should have roots in about 2 weeks.
Plant your rooted salvia cutting in sterile, loose potting soil. Keep the plants moist, but not soaking. Transplant your salvia into your garden after the last frost, or grow them in containers indoors.