Evergreen, Perennials, Shrubs
Ruellias have opposite leaves and flaring, bell-shaped flowers with five shallow lobes. Beyond their hardiness range, they are commonly grown in greenhouses.
This shrubby perennial is a Mexican native that has naturalized in many areas of the southern and southwestern U.S. Grows to 3 ft. high and initially 1–1 1/2 ft. wide, but can be invasive and should be contained (by an edging, for example). Narrow dark green leaves to 3 in. long, 3/4 in. wide; 2-in.-long, lavender-blue flowers throughout the warm times of year. ‘Chi Chi’ has soft pink blossoms. ‘Katie’ is a dwarf (10–12 in.), noninvasive variety. ‘Blanca’ (white flowers) and ‘Rosa’ (pink flowers) have narrow leaves and grow to about 1 ft. high. Regular water.
White flowers. Terminal growth is sometimes distorted by fasciation (growths resembling cockscombs).
Native to Central Europe and Asia Minor. Grows to 3 ft. tall and spreads by underground stems of 2 ft....
These resemble forget-me-nots (Myosotis) but typically have deeper blue, somewhat larger (1/2...