
Light Needs

Mature Height

Mature Spread

Growing Zones
Do the pollinators a favor and plant Encore® azaleas in your garden since they offer repeat blooms that provide essential nectar and pollen for bees, butterflies and other pollinators. Autumn Lilac offers a flush of bright purple two-inch single flowers that are especially welcome to winter-weary bees. Blooms continue to appear throughout the growing season, with a final strong hurrah in fall. You’ll appreciate the evergreen foliage that provides a splash of green during drab winter months too. Unlike some azaleas that can become massive over time, this relatively diminutive one can be tucked in just about anywhere—under windows, alongside entryways, snugged up beside taller shrubs or nestled amid perennials like coral bells (Heuchera), hostas and ferns. You can also plant it in a pot, where it creates a commanding focal point with its bright purple flowers.
Along with their cold hardiness, Encore® azaleas also tolerate sunny conditions better than some azaleas, so you don’t have to over-think their placement. Feel free to combine them with other jewel-toned sun-lovers that pollinators love like roses, weigela, false indigo (Baptisia) and coneflowers for a colorful display. In shadier spots, they complement hydrangeas and stand out well against other evergreens like boxwood and camellias.
Autumn Lilac Encore Azalea Care
Locate your azalea in part shade to full sun in average garden soil that drains well. Dig a hole as deep as the root ball and twice as wide. Backfill with the soil you removed, water well and mulch around the base of the plant to conserve moisture and reduce weeds. You should water regularly thereafter during the first year as the plant is getting established. Fertilize in spring with a granular fertilizer that is formulated for acid-loving plants. Azaleas are best left untrimmed, so their natural shape is retained, but if you do need to do any trimming, wait until just after the spring blooming is over.
Autumn Lilac Encore Azalea Spacing
This is a relatively small azalea, just 3 feet tall and 3.5 feet wide, so the main concern when situating it with other plants is that it doesn’t get covered in time. Be sure there is at least 2 feet all around if you are planting it with other shrubs or vigorous perennials like false indigo or phlox that can spread. If you are clustering several of these azaleas together, you can space them a little tighter, about 1.5 feet center-on-center. If you are planting near a foundation, pull the plants out from under any overhangs so they receive enough rainwater. For container plantings, choose a frost-proof pot that has an opening at least 16 inches wide and holds a minimum of 2-3 gallons of potting soil.
Autumn Lilac Encore Azalea Plant Facts
USDA Hardiness Zones: 6-10 |
Flower Color(s): Lavender with Dark Purple Flecks |
Bloom Period: Spring to Fall |
Foliage Color(s): Shiny Green to Glossy Dark Green |
Light Exposure: Partial Shade to Full Sun |
Height: 3 Feet |
Spread: 3.5 Feet |
Habit: Rounded Compact |
Watering: Medium |
Features: Dwarf, Fall Blooming, Rebloomer, Loves Sun, Attracts Butterflies |
Scientific Name: Rhododendron 'Robles' PP22762 |
Common Name: Autumn Lilac Encore Azalea |
Brand: Encore Azalea |
- SKU:
- AZENLI
Container Sizes
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.

Quart Pot
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts

2.5 Quart
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts

#1 Pot
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts

#2 Pot
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons

#3 Pot
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons

#5 Pot
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons

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Arrival Guarantee
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Pre-Ordered Plants
Pre-ordered plants are scheduled to ship in Spring 2025. We carefully plan our shipping dates based on your USDA Plant Hardiness Zone to ensure optimal planting conditions upon arrival. Want it sooner/later? Reach out, and we'll try our best to accommodate.
Estimated Spring Shipping Schedule
Estimated ship week for pre-ordered plants will ship based on growing zones as shown below.
Growing Zone | Estimated Ship Week |
---|---|
Zone 10 | March 24th |
Zone 9 | March 31st |
Zone 8 | April 7th |
Zone 7 | April 14th |
Zone 6b | April 21st |
Zone 6a | April 28th |
Zone 5b | May 5th |
Zone 5a | May 12th |
Zone 4 | May 19th |
Zone 3 | May 26th |
Note: These are only estimated ship dates. Plants may ship out later depending on weather & growing conditions of the plant.
Note: Only plants indicated as pre-order will ship as shown above. All other plants and hard goods will ship as normal.
Plants Shipping Now
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.