Northwest Blooms · Shrubs
Rhododendron calendulaceum
Flame Azalea
- Family
- Ericaceae
- Height
- 6 to 12 ft
- Width
- 6 to 12 ft
- Flower color
- Bright orange flowers, often with yellow or red tones and darker spotting
- Foliage color
- Deciduous medium-green leaves, turning yellow to orange in fall
- Bloom time
- Late spring to early summer
- Light
- Full sun to part shade
- Water
- Moderate
- Maintenance
- Low; prune lightly after bloom
- Growing zone
- USDA zones 5 to 7
- Wildlife
- Flowers attract bees and other pollinators
About this plant
Rhododendron calendulaceum is a deciduous shrub admired for its dramatic spring display and open, upright form. In late spring to early summer, large clusters of trumpet-shaped flowers appear at the ends of the branches. Flower colors range from clear yellow and soft orange to glowing apricot and fiery red, often with deeper orange or red markings in the throat. The blooms are lightly fragrant and coincide with leaf emergence, creating a vivid seasonal moment in woodland settings.
This species is native to the Appalachian Mountains of the eastern United States, where it grows on forested slopes and ridges. Its bold flower colors, graceful branching structure, and seasonal rhythm have made it an enduring favorite in native plantings, woodland gardens, and naturalistic landscapes where spring color and regional heritage are valued.
Works well in
Shade Gardens · Foundation Plantings · Native Gardens · Woodland Gardens
Companion plants
Mahonias · Astilbe · Heucheras · Maidenhair fern · Corydalis · Lily-of-the-valley
Design tip
Make Flame Azalea a spring focal point where its fiery flowers can command attention without competing with other bold bloomers. Its substantial size works especially well anchoring a garden bed, where the open branching keeps a larger shrub from feeling overly heavy.
