Species

shrub

Johanna Azalea

The Story

Plant Bio

Kaempferi hybrids are a group of azaleas known for their hardiness, late-season bloom, and often attractive fall foliage color. They are typically deciduous or semi-evergreen depending on the climate.

'Johanna' is prized for its large, funnel-shaped flowers of a vibrant, true crimson-red that hold their color well in the sun. It has an upright, spreading habit and its foliage often turns a lovely reddish-bronze in the fall.

Uses & Benefits:

Provides a spectacular burst of late spring color with its vibrant red flowers. The semi-evergreen foliage adds texture, and its fall color provides additional seasonal interest.

Its relatively large size and dense habit make it suitable for creating informal hedges or screens in woodland and traditional garden settings.

The flowers attract late-spring pollinators, including bees and hummingbirds, providing a valuable nectar source.

SpeciesRhododendron kaempferiTorch Azalea

Essentials

At a Glance

Plant Type

Shrub

Height

60 inches

Width

60 inches

Light

Partial Sun

Zones

6, 7, 8

Water

Moderate

Humidity

Moderate

Lifespan

Long-lived shrub

Native To

Hybrid (parent species from Japan)

Toxicity

All parts are toxic if ingested

Bloom period

Late spring

In flower about 1 month of the year

Planting

How to Grow

Select a site with acidic, well-drained soil and filtered sunlight.
Dig a hole twice as wide as the root ball but no deeper.
Amend the backfill with organic matter like compost or pine bark.
Plant with the top of the root ball slightly above the surrounding soil.
Backfill the hole, water thoroughly to settle the soil.
Apply a 2-inch layer of acidic mulch like pine straw.

Pro Tip

A location with morning sun and dappled afternoon shade is ideal to promote the best flowering and prevent leaf scorch.

Keep It Thriving

Care Guide

Do

Ensure acidic soil conditions (pH 5.0-6.0).
Provide consistent moisture, especially in summer.
Mulch to protect the shallow root system.
Prune right after flowering to avoid cutting off next year's buds.

Don't

Do not plant too deeply.
Avoid heavy clay soil without significant amendment.
Do not let the plant dry out completely during summer.
Avoid sites with hot afternoon sun or harsh winter winds.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Mulch
Plant
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Bold accent in a mixed borderInformal screening or hedgeWoodland garden highlight

Companion Plants

Pieris japonicaFerns Hosta Kalmia latifoliaEnkianthus campanulatus

Multiply

Propagation Methods

Good to Know

Common Questions

Johanna Azalea questions

What zones can Johanna Azalea grow in?

Johanna 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 Johanna Azalea deer resistant?

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

When does Johanna Azalea bloom?

Johanna 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 Johanna Azalea need full sun?

Johanna Azalea does best in part shade.