Ocimum basilicum L. (Lamiaceae) commonly known as sweet basil, has been used as a traditional medicinal plant for the treatment of headaches, coughs, diarrhea, constipation, warts, worms, and kidney malfunctions. Store fresh basil leaves in the refrigerator, wrapped in barely damp paper towels and then in a plastic bag, for up to four days.
Store a bunch of basil, stems down, in a glass of water with a plastic bag over the leaves. Secure plastic bag to the glass with a rubber band. Refrigerate for up to a week, changing the water every other day.