shrub

Encore Autumn Lilac Azalea

Rhododendron 'Encore Autumn Lilac'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Shrub

Height

42 inches

Width

42 inches

Light

Full Sun, Partial Sun

Zones

6, 7, 8, 9

Water

Moderate

Humidity

Moderate

Lifespan

Long-lived shrub

Native To

Hybrid

Toxicity

All parts are toxic if ingested

The Story

Plant Bio

Rhododendrons, which include azaleas, are a vast genus of woody, mostly evergreen shrubs prized for their spectacular blooms. They are acid-loving plants with shallow root systems that require well-drained, humus-rich soil. The Encore series is revolutionary for its ability to rebloom, providing flowers in spring, summer, and fall. 'Autumn Lilac' is noted for its vibrant, single-form lavender blooms with darker purple freckles and its robust, sun-tolerant nature.

Bloom Period:

EarlyLate

Uses & Benefits:

The primary benefit is the extended blooming season, providing vibrant color in the garden not just in spring, but also through the heat of summer and into the fall. The evergreen foliage provides year-round structure and color.

Its compact, mounding habit makes it an excellent choice for foundation plantings, low hedges, and massing on banks or in borders without requiring constant pruning to control its size.

The flowers provide a valuable nectar source for pollinators like bees, butterflies, and hummingbirds over a much longer period than traditional azaleas, supporting local ecosystems from spring through fall.

Marketplace

Where to Buy

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Planting

How to Grow

Select a site with acidic, well-drained soil and morning sun.
Dig a hole twice as wide and just as deep as the root ball.
Amend the backfill soil with compost or peat moss.
Set the plant so the top of the root ball is slightly above grade.
Fill the hole, gently firming the soil around the roots.
Water deeply and apply a 2-3 inch layer of acidic mulch.

Pro Tip

Plant high, with the top of the root ball slightly above the surrounding soil level, to ensure excellent drainage.

Keep It Thriving

Care Guide

Do

Maintain a consistent layer of mulch to protect shallow roots.
Water regularly, especially during dry periods and the first year.
Test soil pH and amend if necessary to keep it acidic.
Prune right after the spring bloom to avoid cutting off future flowers.

Don't

Do not plant too deep; this is a common cause of failure.
Avoid using broadleaf weed killers near azaleas.
Don't let the root ball dry out completely.
Do not cultivate around the base of the plant, as roots are shallow.

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

Multi-season foundation plantingColorful mass planting for continuous bloomsSpecimen plant in mixed borders

Companion Plants

Hydrangea macrophylla Pieris japonica Kalmia latifolia Ferns (various) Hosta (various)

Multiply

Propagation Methods

Good to Know

Common Questions

Encore Autumn Lilac Azalea questions

What zones can Encore Autumn Lilac Azalea grow in?

Encore Autumn Lilac Azalea is hardy in USDA Zones 6–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Encore Autumn Lilac Azalea deer resistant?

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

When does Encore Autumn Lilac Azalea bloom?

Encore Autumn Lilac Azalea typically blooms in early spring through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Encore Autumn Lilac Azalea need full sun?

Encore Autumn Lilac Azalea does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.