Flame Azalea — Rhododendron calendulaceum

Flame Azalea (Rhododendron calendulaceum) is a large native deciduous shrub with a loosely upright habit and fiery spring flowers. Loose flower clusters bloom in shades of yellow, orange or red from mid to late spring. Flower color varies between plants; a specific shade is not guaranteed.

Green foliage turns yellow-red in fall, extending its seasonal appeal. Grow in part sun and rich, moist, acidic, well-drained soil, with room for its broad mature spread.

Growing details

• Plant type: Native deciduous flowering shrub
• Listed height: 4–8 feet
• Listed spread: 8–10 feet
• Spacing: Approximately 9 feet apart
• Listed USDA hardiness zones: 6–8
• Light: Part sun
• Soil: Rich, moist, acidic and well-drained
• Flowers: Variable shades of yellow, orange or red
• Bloom season: Mid to late spring
• Fall foliage: Yellow-red

Care and garden use

This low-maintenance shrub benefits from regular watering, winter mulch and good air circulation. Maintain soil moisture while ensuring good drainage.

Use as an accent, in groups, along borders, in naturalized or wildlife gardens, or as an informal hedge. Foundation beds should provide adequate space for the listed mature spread. Pair with hydrangea, azalea or coral bells where growing requirements align.

Image credit: Prides Corner, Azalea calendulaceum.

Plants naturally vary in appearance and may differ from the images shown.