Choose a country to see content specific to your location

A picture of a Rhododendron

Rhododendron

Rhododendron spp.

Full Sun
Moderate care
Moderate watering
Half-hardy

6a-10a

USDA zone

-23°C

Minimum temperature

Expected size

Height
Spread

20m

Max

10m

50cm

Min

50cm

Flowering

  • spring
  • summer
  • autumn
  • winter

More images of Rhododendron

Pontische rododendron struik (Rhododendron ponticum)
A photo of Rhododendron
Rhododendron brachycarpum 01
Ledum glandulosum 7486
A photo of Rhododendron

Rhododendron Overview

Rhododendron is a large genus with over 1,000 species of evergreen, semi-evergreen or deciduous shrubs ranging greatly in size and stature. This genus from the Ericaceae family is widely grown for its attractive, sometimes scented, generally 5-lobed flowers. Many hybrids and cultivars have been bred and are commercially available for garden planting. These are used extensively as ornamental landscaping plants and are well adapted to temperate and subtemperate climates. In horticulture, there are four groups: evergreen rhododendrons (includes hardy hybrids), Vireya rhododendrons (frost-tender Malesian shrubs), azaleas (belonging to the botanical section Azalea within the genus Rhododendron), and Azaleodendrons (hybrids between deciduous azaleas and evergreen hybrid rhododendrons). These plants prefer a soil pH of between 4.5 and 5.5 and a high organic matter content. When planting new plants, mix plenty of acidic organic matter such as leaf mould, decomposing pine needles, or composted tree bark into the soil.

Common problems with Rhododendron

How to propagate Rhododendron

Seed

Layering

Cuttings

Special features of Rhododendron

Attractive flowers

Attracts useful insects

Hedge plant

Attractive leaves

Other uses of Rhododendron

Grown mainly for the beauty of the flowers. Ground cover & interesting leaves. Suitable for northern and eastern aspects.

Spring Flower Plants – Top 20

Brighten your spring day by adding these early flowering plants into your space.

Explore all