Types of basil: sweet, Thai, Genovese, lemon
The term "basil" covers a wide range of cultivars and species within the genus *Ocimum*, with flavor profiles that range from the classic Italian sweet basil to anise-forward Thai basil to citrusy lemon basil. Most belong to *Ocimum basilicum*, but the flavor differences are substantial enough that.
The term "basil" covers a wide range of cultivars and species within the genus Ocimum, with flavor profiles that range from the classic Italian sweet basil to anise-forward Thai basil to citrusy lemon basil. Most belong to Ocimum basilicum, but the flavor differences are substantial enough that they are not interchangeable in most applications.
Understanding the main types helps you grow the right basil for your cooking and select the varieties most suited to your climate.
The main cultivar table
| Type | Species/Cultivar | Flavor | Height | Best Use |
|---|---|---|---|---|
| Genovese / Sweet basil | O. basilicum 'Genovese' | Classic sweet, pepper, floral | 18–24 in | Pesto, Caprese, Italian cooking |
| Large-leaf Italian | O. basilicum 'Mammoth' | Mild sweet basil | 24–30 in | Large leaves for wrapping |
| Thai basil | O. basilicum var. thyrsiflora | Anise, clove, pepper | 12–18 in | Thai, Vietnamese, stir-fry |
| Lemon basil | O. × citriodorum | Citrus-lemon, floral | 12–18 in | Fish, desserts, teas |
| Holy basil (Tulsi) | O. tenuiflorum | Clove, pepper, complex | 18–24 in | Thai cooking; herbal tea |
| Purple (Dark Opal) | O. basilicum 'Dark Opal' | Sweet basil; slightly spicier | 18 in | Salads, garnish, vinegar |
| Greek / Spicy Globe | O. minimum | Compact; mild sweet basil | 8–12 in | Containers; decorative |
| Cinnamon basil | O. basilicum 'Cinnamon' | Cinnamon-spice note | 18–24 in | Teas, desserts, fruit |
| African Blue basil | O. kilimandscharicum × gratissimum hybrid | Camphor, spice; not sweet | 24–36 in | Ornamental; pollinator magnet |
| Licorice basil | O. basilicum 'Licorice' | Strong anise | 18–24 in | Teas, Asian-inspired dishes |
Per NC State Extension, all Ocimum basilicum varieties are grown the same way: warm soil, full sun, consistent moisture, well-drained soil. The flavor differences are entirely due to different essential oil compositions.