Valued for clusters of intense blue, phloxlike flowers that bloom in summer to late fall, when cool hues are often especially welcome in the garden. (For pale blue-flowered Cape plumbago, see Plumbago auriculata.) Tolerates inconsistent watering. Shrubby species are usually treated like perennials in colder zones; cut them back after bloom and apply a thick mulch.Ceratostigma griffithii
Himalayan native that grows to 2 1/2–3 ft. high and wide, with roundish, deep green leaves. Even light frost will nip back the growth on this plant. Blue, phlox-like flowers appear in fall.
This evergreen shrub is reported to be a hybrid between L. japonicum ‘Rotundifolium&rsq...
From Japan. Possibly the hardiest of the banana clan. Grows to 15 ft. tall, with narrow green leaves a...
Native to China and Japan. Erect growth to 2 ft. tall and 1 1/2 ft. wide. One of the few ferns with se...