Ocimum basilicum var. thyrsiflora. Siam Queen Thai basil seeds are the authentic heirloom basil variety that is native to southeast Asia. Known as horapha in Thai, and húng quế in Vietnamese. Highly regarded for its distinctive, spicy flavour. Vigorous, highly ornamental plants with purple stalks and flowers that open to pink, providing a nice contrast to its dark green leaves. This variety is particularly productive in hot weather or in a greenhouse, and will thrive in the Okanagan and in southern Ontario. It performs well in containers, but don't let it dry out. Pick young shoots regularly to extend the harvest.