Purple Basil is a cultivar of Ocimum basilicum (sweet basil). The dark purple leaves are used in pesto or as a garnish. This attractive basil variety has won multiple awards for its beauty, flavor and ease of cultivation. Like other basil, Purple basil is packed with Vitamin K, which helps with blood clotting and aids in bone strength. Used medicinally for its antioxidants and antibacterial properties, basil oil provides an immune system boost and combats aging and skin ailments.