Echium webbii (Echium webbii) is a frost hardy biennial evergreen plant with blue flowers in late Summer and mid Summer. It grows well in direct sun, and prefers medium levels of water. The flowers are arranged in a panicle inflorescence. It has high drought tolerance. It looks best in Summer.
White Wax Begonias Wax begonias are tender perennials in Zones 8-11 but I grow them as a flower suitable for edging beds in light shade. It has waxy leaves and produces clusters of single or double white flowers. Wax begonias bloom non-stop throughout the entire season until first frost. It looks great with another annual, Purple Angelonia, as I planted here.