Light Needs
Mature Height
Mature Spread
Growing Zones
- Zones 6 - 10
- Height 3 - 4 Feet
- Spread 3 - 4 Feet
The Autumn Sunset™ Encore® Azalea, Azalea x ‘Roblen’ PP#16248, has bright red-orange 2.5 inch flowers that bloom spring through fall and will remind you of a beautiful, brilliant sunset. Compact form fits into any landscape. Works well in containers, as an accent or as foundation plantings. This broadleaf evergreen also makes a superior compact hedge, providing four seasons of color.
Autumn Sunset™ Encore® Azalea Care
Requires shade only in the hottest areas. Plant high to promote good drainage. Don’t allow the soil to become dry until established. Azaleas perform best in acidic soil, which can be amended with chelated iron if necessary. Prune only to shape after the first bloom period in spring. Fertilize in late winter or early spring to give the upcoming blooms a boost. This plant tolerates more sun than most other azaleas.
Autumn Sunset™ Encore® Azalea Spacing
When establishing a hedge, plant 3.5 to 4 feet apart, center to center. Plant 5 to 6 feet apart, center to center, for a shrub border or as foundation plantings.
Autumn Sunset Encore Azalea Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 6 to 10 (perennial); grown as an annual elsewhere (outdoors year-round); grown indoors elsewhere (outdoors year-round); grown in containers elsewhere (grown as a seasonal crop)
- Sun Exposure
- Part Shade to Full Sun (4+ Hours Direct Sun)
- Mature Height
- 3 Feet
- Mature Spread
- 3.5 Feet
- Growth Habit
- , Mounded
- Water Needs
- Consistently Moist
Flowers & Foliage
- Flower Colors
- , Red
- Flower Description
- Red/Orange
- Bloom Time
- Spring to Fall
- Blooms On
-
Both New and Old Wood
?
"Blooms on" tells you which stems produce flowers, which decides when it's safe to prune.
- New Wood: Flowers form on stems that grow this season. Prune in late winter or early spring without losing blooms.
- Old Wood: Flower buds form on last year's stems. Prune right after flowering. Pruning in fall or early spring removes next year's blooms.
- Both New and Old Wood: Blooms on last year's stems and again on new growth, so it flowers even after a hard winter or a mistimed pruning. Prune lightly after the first flush of blooms.
- When to Prune
- Lightly, right after the first flush of flowers
- Foliage Color
- , Green
- Foliage Description
- Glossy Bright Green
- Foliage Type
- , Evergreen
- Seasonal Interest
- , Spring Flowering, Summer Flowering, Fall Flowering, Winter Interest, 3 Season Interest, 4 Season Interest
Garden Benefits
Plant Overview
- Common Name
- Autumn Sunset™ Encore Azalea
- Also Known As
- Autumn Sunset Encore Azalea
- Botanical Name
- Rhododendron 'Roblen' PP16248
- Brand
- Encore Azalea
Simple Plant Spacing Calculator
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.
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
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
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
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
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
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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We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
Starting January 1, 2026 all bushes, perennials & trees purchased come with an extended 1-year warranty for added confidence. If your plant dies due to a health issue within a year, we’ll make it right.
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.
Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
If you have any questions about shipping restrictions, feel free to reach out to our team!