African blue basil ("Ocimum kilimandscharicum " ×"basilicum"'Dark Opal') is one of a few types of basil that is perennial.
African blue basil ("Ocimum kilimandscharicum " ×"basilicum"'Dark Opal') is native to Kenya, Tanzania, Uganda, Sudan, and Ethiopia. It one of a few types of basil that is perennial.