Choose a healthy, non-flowering rosemary stem
Cut a 4 to 6 inch section from soft or semi-hardwood growth
Remove leaves from the lower half of the cutting
Dip the cut end in rooting hormone if desired
Fill a small pot with well-draining potting mix or a sand-perlite mix
Make a hole in the soil and insert the cutting
Firm the soil around the stem
Water lightly to settle the soil
Place the pot in bright, indirect light
Keep the soil slightly moist, not wet
Cover with a clear plastic bag or humidity dome if needed
Remove the cover periodically for airflow
Check for roots after a few weeks by gently tugging the cutting
Transplant once roots are well developed
Harden off the new plant before moving it outdoors