Cut old stems back in late winter. Semi-evergreen leaves are green and edged all around in cream. Topped with large white flowers in summer. Needs good drainage. The leaves are light green, narrow and grass-like.
Yellow flowers bloom in late spring.
To 1 foot. Blue flowers with yellow center appear spring through fall. Tender in cold areas, it will readily seed every year, producing many babies that are true to their parentage. Flowers are arranged in umbel-like clusters and are a nice shade of purple. Deep blue flowers in late spring.