"Genovese" basil grows to heights of 24 to 30 inches, with large bright green leaves. Sweet basil grows 12 to 24 inches high, with smaller leaves 2 to 3 inches long that are a darker green with a hint of purple. Sweet basil blooms white, while "Genovese" produces purple flower stalks. Both varieties produce a bushy plant when you keep them pinched back and provide lush green growth in the herb garden.
Sweet basil has an exotic flavor similar to a blend of licorice and cloves with a hint of mint. The herb is used in many Italian and tomato dishes. "Genovese" basil has a stronger flavor that is a stronger combination of anise and cloves. It is the "Genovese" basil that is most popular with chefs when preparing pesto sauce. Both varieties of basil add a distinct but subtle flavor when added to salads and teas.
Basil grows all over the world, from Asia and Africa to Greece and Israel and many countries in between. The plant originated in India and has been cultivated to produce over 150 known varieties. "Genovese" basil is classified as an Italian basil from the Mediterranean area. Sweet basil is from southeast Asia and central Africa. The plant is extremely susceptible to cross-pollination so there are many hybrids.
Basil is used in the manufacturing of medicine, candles, soaps and numerous other products. Whether you grow sweet basil or "Genovese" basil, the plants must be put in the garden after all danger of frost has passed. Both varieties prefer full sun. Maturity times are the same for the plants. The difference is that sweet basil is slightly drought-tolerant. "Genovese" basil suffers when the garden soil becomes too dry.