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PlantSnap
Plant Care
Azalea
(Rhododendron simsii)
Also Known As
Azalea, Chinese azalea, Houseplant azalea, Taiwan azalea
About This Plant
Rhododendron simsii is an evergreen shrub that grows up to 6 feet (1.8 m) tall and 4 feet (1.2 m) wide. The leaves are dark green and glossy, and the flowers are funnel-shaped and come in shades of pink, red, white, and purple.
Plant Care Instructions
Outdoor Size Range
3-6 feet (0.9-1.8 m) tall and 3-4 feet (0.9-1.2 m) wide
Light Requirements
Azaleas prefer bright, indirect light. They can handle some direct sun in the morning or late afternoon, but too much direct sun can burn the leaves.
Humidity Needs
Azaleas prefer high humidity, around 60-70%. You can increase humidity by placing a humidifier nearby, or by placing a tray of water near the plant.
Fertilizing Schedule
Azaleas require acidic soil with a pH of 4.5-6.0. Fertilize them with an acidic fertilizer, such as one formulated for azaleas and camellias, in early spring and again in late spring.
Pruning Guidelines
Azaleas require minimal pruning. Prune them after they finish flowering to shape the plant and remove any dead or diseased branches.
Common Pests and Diseases
Common pests for azaleas include lace bugs, spider mites, and azalea caterpillars. Diseases include powdery mildew and root rot.
Indoor Size Range
18-24 inches (45.7-61 cm) tall and wide
Watering Schedule
Azaleas require consistently moist soil. Water them deeply once a week, or more often during hot, dry weather. Avoid getting water on the leaves, as this can cause fungal diseases.
Temperature Range
Azaleas prefer cool temperatures, around 60-65°F (15.5-18°C). They can handle temperatures as low as 40°F (4.5°C) but avoid temperatures above 75°F (24°C).
Growing Season
Azaleas bloom in the spring, typically from March to May.
Growing Difficulty Level
Azaleas can be moderately difficult to grow. They require specific soil conditions, consistent watering, and high humidity. However, with proper care, they can be a rewarding plant to grow.
USDA Hardiness Zones
Azaleas are hardy in USDA zones 6-9.
Did You Know?
Azaleas are the state flower of Georgia in the United States.
