Ruellia brittoniana 'Katie'
Dwarf Ruellia is a low-growing, herbaceous perennial with
long, narrow, dark green leaves. It is compact, growing to
one foot tall by one to two feet wide. A prolific bloomer,
the large petunia-like tubular flowers are present from spring
until frost. The cultivar 'Katie' was discovered by Lynn
Lowery, a famous Texas plantsman and has blue flowers.
Rosa is a pink form and Blanca has white flowers. In the
low desert, flowering is concentrated in spring and fall.
Cut back in late winter to remove any frost damaged leaves and
to promote new growth. Dwarf Ruellia can be planted in
full sun or part shade and is an excellent choice for containers
and oasis zones. It has a tendency to naturalize in moist
soils and seedlings can be larger than intended as they are
reversions to the species. Therefore, all seedlings should
be removed. Hardy to 15°F, it is placed in USDA Zone 8.