shrub

Compact Korean Azalea

Rhododendron yedoense 'Compacta'

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Essentials

At a Glance

Plant Type

Shrub

Height

30 inches

Width

48 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Medium

Humidity

Adaptable

Lifespan

Long-lived shrub

Native To

Korea

Toxicity

All parts are toxic if ingested.

The Story

Plant Bio

Rhododendron yedoense var. poukhanense, the Korean Azalea, is a tough, adaptable, and cold-hardy species known for its profuse spring blooms and tolerance of sunnier conditions than many other azaleas. 'Compacta' is a lower-growing, denser, and more spreading selection of the species. It is prized for its extreme hardiness and reliable, abundant display of fragrant, single, lilac-purple flowers.

Bloom Period:

EarlyLate

Uses & Benefits:

Provides a massive and reliable display of fragrant lavender flowers in spring. Its semi-evergreen foliage often develops attractive burgundy tones in the fall, extending its seasonal interest.

Its tough nature, cold hardiness, and tolerance for sun make it a versatile landscape plant. The compact, spreading habit is ideal for mass plantings, foundation use, and erosion control on slopes.

The flowers are an important nectar source for early-season pollinators like bees and butterflies, as well as hummingbirds.

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Where to Buy

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Planting

How to Grow

Select a site with acidic, well-drained soil.
Dig a shallow, wide hole, twice the width of the root ball.
Amend soil with organic matter like compost or peat moss.
Plant with the top of the root ball slightly above the surrounding soil.
Backfill, water thoroughly to settle the soil, and mulch.
Provide consistent water during the first growing season to establish roots.

Pro Tip

This azalea is exceptionally cold hardy, making it a reliable choice for northern gardens where other azaleas may fail.

Keep It Thriving

Care Guide

Do

Plant in acidic soil with a pH between 4.5 and 6.0.
Water during dry periods, especially in summer and fall.
Mulch to conserve moisture and regulate soil temperature.
Prune immediately after flowering to avoid removing next year's buds.

Don't

Do not plant too deeply.
Do not let the soil become waterlogged.
Do not use lime or wood ash near azaleas as it raises soil pH.
Do not fertilize late in the season.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Hardy mass planting on a slopeLow foundation shrub for spring colorColorful border edging

Companion Plants

Pieris japonica Kalmia latifolia Fothergilla gardenii Heuchera Tiarella

Multiply

Propagation Methods

Good to Know

Common Questions

Compact Korean Azalea questions

What zones can Compact Korean Azalea grow in?

Compact Korean Azalea is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Compact Korean Azalea deer resistant?

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

When does Compact Korean Azalea bloom?

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

Does Compact Korean Azalea need full sun?

Compact Korean Azalea does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.