Was this a truly dry sprig? It’s best to use fresh, green (not woody) cuttings to propagate thyme, during the growing season—spring through early fall. As the days get closer to winter, the plant may respond more slowly, or it may not form roots at all.
For a tip cutting, remove the top 3 to 4-inches of a sprig, cutting at an angle, and then dusting the cut end in rooting hormone. (You may want to make the cut just below a node—where the leaves emerge from the stem.) Strip off all but the top several leaves and sink the cutting about 1/3 to 1/2 of the way into soil mix, vermiculite, or perlite. Keep the soil moist but not waterlogged. Cover with a plastic bag to keep the environment moist—prop it up so that the plastic does not touch the plant. Place in a warm area in bright, indirect light. Providing bottom heat, such as using a heating mat for seedlings, can be helpful. Keep up with watering (again, making sure that it is not overly moist). Roots should form in about two to six weeks.
Was this a truly dry sprig? It’s best to use fresh, green (not woody) cuttings to propagate thyme, during the growing season—spring through early fall. As the days get closer to winter, the plant may respond more slowly, or it may not form roots at all.
For a tip cutting, remove the top 3 to 4-inches of a sprig, cutting at an angle, and then dusting the cut end in rooting hormone. (You may want to make the cut just below a node—where the leaves emerge from the stem.) Strip off all but the top several leaves and sink the cutting about 1/3 to 1/2 of the way into soil mix, vermiculite, or perlite. Keep the soil moist but not waterlogged. Cover with a plastic bag to keep the environment moist—prop it up so that the plastic does not touch the plant. Place in a warm area in bright, indirect light. Providing bottom heat, such as using a heating mat for seedlings, can be helpful. Keep up with watering (again, making sure that it is not overly moist). Roots should form in about two to six weeks.