Evergreen, Ground covers, Perennials
Most are natives of North America. With the exception of Phlox drummondii (annual phlox), the species described here are perennial. The many types show wide variation in form, but all have showy flower clusters. Tall kinds are excellent border plants; dwarf ones are mainstays of the rock garden. Unless otherwise noted, grow in ordinary garden soil and provide regular moisture. Two major problems affect phlox: red spider mites (attack almost all species) and powdery mildew (P. paniculata is especially susceptible).Phlox subulata
From eastern U.S. Forms a mat to 6 in. high, 1 1-1/2ft. or wider, with creeping stems clothed in stiffish, 1/2-in., needlelike evergreen to semievergreen leaves. Blooms in late spring or early summer, bearing 1/2-in. flowers in white and colors including pale to deep shades of pink, and lavender blue. Makes sheets of brilliant color in rock gardens. Plant in loose, not-too rich soil; give moderate water. After flowering, cut back halfway.
From eastern U.S. Forms a mat to 6 in. high, 1 1-1/2ft. or wider, with creeping stems clothed in stiff...
Native to Europe, Asia. To 40–70 ft. high and wide. Common name refers to woolly white leaf unde...
Native to Europe and Asia, this seedless poplar variety forms a 15-ft.-wide column and has a white or ...