Find a large canning jar and place a few inches of water inside. Make sure the jar is large enough that the basil stems won’t be squished or packed inside.
Place the basil stems inside the jar, cut side down. Screw on the lid of the jar, which helps to keep the basil fresh.
Store refrigerated for 3 to 5 days. You also can store the basil at room temperature, which keeps it fresh for about 3 to 4 days.