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Rhododendron calendulaceum (Flame azalea)

Rhododendron calendulaceum Photo/Illustration: Courtesy of Sunlight Gardens, www.sunlightgardens.com


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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11
Botanical Name: Rhododendron calendulaceum Common Name: Flame azalea Genus: Rhododendron
This plant's leaves are mid-green, and softly hairy on both sides. In late midseason, as leaves emerge or just after, this plant bears lax trusses of yellow to dark reddish orange flowers. It grows to 8 feet tall and wide.
Noteworthy characteristics: Native of the eastern United States.
Care: Prefers full sun but may need shade in the South. Grow in moist, fertile, humus-rich acidic soil (pH 4.5 to 5.5) in dappled shade. Plant shallow, as plants are surface rooted and like a mulch covering.
Propagation: Root semi-ripe cuttings in late summer or autumn. Layer in autumn.
Problems: Vine weevil, whitefly, leafhoppers, lacebugs, scale, caterpillars, aphids. Powdery mildew, rust, bud blast, leaf gall, petal blight, root rot, and chlorosis (due to insufficient soil acid).
Height 6 ft. to 10 ft.
Spread 6 ft. to 10 ft.
Light Full Sun to Part Shade
Moisture Medium Moisture
Characteristics Native; Showy Flowers
Bloom Time Spring
Flower Color Orange/ Salmon Flower; Red Flower; Yellow Flower
Style Woodland Garden
Seasonal Interest Spring Interest
Type Shrubs

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