Azalea Plant Care

Azalea (Azalea indica) belongs to the Ericaceae family within the Azalea genus. Azalea is native to Japan. Azalea is also known as Indian Azalea, Evergreen Azalea.

Azalea displays a compact, mounding shrub growth habit, reaching up to 5 ft tall with a spread of approximately 5 ft. Azalea produces showy, colorful blooms in various shades of pink, red, white, or purple.

Leaf size: approximately 2 inches.

Water a young or newly planted Azalea every 4–7 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Azalea thrives in filtered sunlight or partial shade. Avoid placing Azalea in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Azalea indica tolerates temperatures of 45–75°F. Azalea prefers humidity levels of 40–60%.

Well-draining acidic soil with high organic matter content, such as peat moss or pine bark. Good drainage is essential for Azalea to prevent waterlogging, which leads to root rot and fungal issues.

Feed Azalea every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees in good soil often need little extra feeding, so let weak growth or pale foliage guide you.

Stop feeding by late summer so new growth can harden before winter.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Choose a spot with filtered sunlight or partial shade and well-draining acidic soil with high organic matter content, such as peat moss or pine bark. Avoid low spots where water collects after rain.

Azalea is suited to USDA Zone 6a – 9b.

Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.

Azalea can spread to about 5 ft (1.5 m) and reach about 5 ft (2 m) tall. Space plants about 5 ft (1.5 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.

Planning a row or hedge? Try the tree spacing calculator.

Prune Azalea while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.

If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the tree in one year.

Azalea is hardy down to USDA zone 6a, so once established it can stay outdoors through winter in that zone and warmer ones.

Water deeply in late autumn before the ground freezes, and spread a 5–8 cm (2–3 in) layer of mulch over the root zone, keeping it away from the trunk.

Young and container-grown trees need extra protection: roots in a pot freeze much more easily than roots in the ground.

Azalea can be propagated through softwood cuttings, layering, seeds.

See all plants toxic to cats and plants toxic to dogs.

Azalea is susceptible to spider mites, lace bugs, caterpillars. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Azalea grows outdoors in USDA Zone 6a – 9b. It survives winters down to planting zone 6a. Azalea is native to Japan.