1 named cultivar

‘Johanna’Johanna Azalea

shrub

Torch Azalea

The Story

Plant Bio

Rhododendron kaempferi, torch azalea, is a dense rounded semi-evergreen shrub from Japan, four to ten feet high and five to six feet across. Multi-stemmed growth carries dense forward-pointing red-brown hairs, and funnel-shaped flowers one to three inches across in salmon to orange-red open in late spring and early summer.

The flower colour is the giveaway — a hot salmon to orange-red rare among hardy azaleas, and the source of the torch name. It is semi-evergreen rather than deciduous, holding some leaves through mild winters, and it is one of the parent species behind the Kurume azaleas. Every part is toxic, including the nectar.

Uses & Benefits:

Hot salmon to orange-red funnel flowers, a colour rare among hardy azaleas, on a dense rounded shrub.

Semi-evergreen, so it holds some cover through mild winters, and it needs very little pruning.

Nectar draws hummingbirds and bees, and NCSU records the genus supporting specialist bees.

Essentials

At a Glance

Plant Type

Shrub

Height

84 inches

Width

60 inches

Light

Partial Sun

Zones

6, 7, 8

Water

Moderate

Humidity

Moderate

Lifespan

Perennial

Native To

Japan

Toxicity

All parts toxic, including nectar

Planting

How to Grow

Plant in dappled light or partial shade.
Give it acidic, humus-rich, well-drained soil.
Plant shallowly; the roots are fine and surface-running.
Mulch to keep the roots cool and moist.
Water in drought; it will not tolerate dry roots.
Deadhead spent trusses where practical.

Pro Tip

Plant it shallow and mulch instead of digging deep — the root system is a fine surface mat, and burying the crown kills more azaleas than cold does.

Keep It Thriving

Care Guide

Do

Give it acidic soil 🌱
Plant shallowly 🪴
Mulch to keep roots cool 🍂
Water through drought 💧

Don't

Plant it deeply ❌
Let the roots dry out ❌
Use lime or alkaline soil ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Enjoy
Mulch

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Woodland and shade plantingAsian-style gardenContainer and patio shrub

Companion Plants

Japanese Maple Camellia HostaJapanese Painted Fern Pieris

Multiply

Propagation Methods

Good to Know

Common Questions

Torch Azalea questions

What zones can Torch Azalea grow in?

Torch Azalea is hardy in USDA Zones 6–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Torch Azalea deer resistant?

Not reliably. Deer may browse Torch Azalea, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Torch Azalea bloom?

Torch Azalea typically blooms in late spring through late spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Torch Azalea need full sun?

Torch Azalea does best in part shade.