Select healthy, robust, non-blooming tops of any type of basil. Cut to 4 inches long and snip off all leaves from the lower half.
Fill small jars or drinking glasses about half full with water.
Place four basil sprigs into each glass or jar and set them in a spot with indirect light and no direct sun.
Replace the water in your glass or jar every day to prevent the stems from rotting.
Plant each rooted basil cutting in a small pot after two or three weeks, when the roots are at least 1 inch long, using a good quality potting soil. Transplant them to the garden or into a larger container when they are 4 inches or taller.