Light Needs
Mature Height
Mature Spread
Growing Zones
The Autumn Starburst™ Encore® Azalea puts on a very impressive display when it blooms. Two-tone flowers feature coral pink petals with bold white margins, giving the blooms a striped appearance. The Rhododendron ‘Robleze’ is a prolific bloomer in the spring, and this plant will bloom again during the summer and fall. Subsequent blooms tend to produce a small number of flowers, but the plant will still put on a beautiful display.
This plant is a perennial in USDA growing zones 6 through 10. The flowers certainly steal the show, but this Azalea also features dark green foliage that hangs in there all year, allowing this evergreen to provide color and visual interest during the winter. Plant the Autumn Starburst™ Encore® Azalea along foundations, in borders or hedges, or use it in a container. This Azalea will attract butterflies and birds.
Autumn Starburst™ Encore® Azalea Plant Care
Find a spot that receives 4 to 6 hours of sunlight each day because this plant needs full sun to part shade to flourish. Azaleas prefer slightly acidic soil, and the soil should also be rich and allow for good drainage. Established plants need water maybe once or twice a week, but new plants will need water up to three times a week for the first year. Fertilize in the spring and early summer to encourage new growth and more flowers.
This plant stays compact and has a rounded growth habit, so it naturally maintains a good shape, and significant pruning is not generally needed.
Autumn Starburst™ Encore® Azalea Plant Spacing
The Autumn Starburst™ Encore® Azalea will grow 3 feet tall and 3.5 feet wide. For mass plantings or hedges, space the plants 2.5 feet apart to create a consistent wall of greenery. Space plants further apart if you want each individual plant to stand on its own.
Autumn Starburst™ 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 (3+ Hours Direct Sun)
- Mature Height
- 3 Feet
- Mature Spread
- 3 Feet
- Growth Habit
- , Dwarf
- Water Needs
- Average
Flowers & Foliage
- Flower Colors
- , Pink
- Flower Description
- Bicolor Coral Pink Blossoms With Bold White Margins
- 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
- Green
- Foliage Type
- , Evergreen
- Seasonal Interest
- , Spring Flowering
Garden Benefits
Plant Overview
- Common Name
- Autumn Starburst™ Encore® Azalea
- Botanical Name
- Rhododendron 'Robleze' PPAF
- Brand
- Encore Azalea
- Plant Type
- Shrub
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: AZ, CA, ID, MT, NV, OR, UT, WA, 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!