The deciduous hybrid azalea, like it’s native counterpart, is known for excellent fall color and unsurpassed spring flowers. The deciduous azalea is usually less picky about soil conditions, though it too prefers acid conditions. Though azaleas have a potentially large […]
Rhododendron ( ‘Jack A. Sand’ Knap Hill Azalea )
Compact, hardy, deciduous shrub with elliptic to oblong, 2 to 6 inch long leaves. Flowers are borne in huge, showy trusses of 18-30 blooms per cluster. Bloom time is from mid to late spring. The deciduous hybrid azalea, like it’s […]
Rhododendron ( ‘Greenwood Rosy-red’ Greenwood Hybrid Azalea )
Bill Guttormsen of Canby, Oregon began breeding the Greenwood hybrids in 1960. The parentage includes Kurume, Glenn Dale, and Gable hybrids. Compact, rounded, evergreen azalea that was developed to thrive in temperate climates and is hardy to 0 degrees F. […]
Rhodochiton volubile ( Rhodochiton )
Deciduous climber with rich green leaves and pendent, tubular, blackish red flowers. Blooms summer to fall. Reaches 10 feet or more. Good cover for pergola or trellis in frost-free climate. Prone to spider mites and whiteflies. Prefers fertile, humus-rich, moist […]
Rhodochiton atrosanguineus ( Rhodochiton )
Deciduous climber with rich green leaves and pendent, tubular, blackish red flowers. Blooms summer to fall. Reaches 10 feet or more. Good cover for pergola or trellis in frost-free climate. Prone to spider mites and whiteflies. Will climb to 10 […]
Rhodiola wallichiana ( Rhodiola )
Rhizomatous perennial with linear, toothed leaves. Dense corymb-like star-shaped flowers in light yellow and light green bloom in summer. Great rock garden plant. Prone to aphids. Prefers moderately fertile soil in full sun.Sometimes referred to as Sedum crassipes or Sedum […]
Rhodiola rosea ( Sedum )
Rhizomatous clump-forming perennial with fleshy grayish green leaves with red tinted tips. From pink buds, dense corymbs of male and female yellowish green flowers bloom late spring to early summer. Good rock garden plant. Prone to aphids. Prefers moderately fertile […]
Rhodiola heterodonta ( Sedum )
Rhizomatous perennial with fleshy grayish green leaves. Dense cymes of star-shaped yellow flowers bloom late spring to early summer. Male flowers have red or purple anthers; females have carpels with purple tips. Good rock garden plant. Prone to aphids. Prefers […]
Rhodanthemum maresii ( Aster )
Subshrub that spreads and is similar in habit to Rhodanthemum hosmariense. Foliage is soft, hairy and silvery green. Single flowers are yellow ray florets with yellow disk florets that turn purple with age. Blooms in summer. Susceptible to scale insects […]
Rhodanthemum manglesii ( Swan River Everlasing )
Fast-growing, erect and bushy annual that thrives in poor soil and full sun. Leaves are oblong and grayish green. Small, single flowers of white, pink and red bracts surround yellow disk florets. Blooms from summer to early fall. Sometimes referred […]
