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Rhododendron Encore® Autumn Sunburst®

Rhododendron 'Roblet' PP25072, Re-blooming Rhododendrons

Rhododendron Encore® Autumn Sunburst™, Encore Azalea Series, Rhododendron 'Roblet', Re-blooming Rhododendrons, Coral Azalea, Coral Rhododendron, Coral Flowering Shrub,

Noted for its multi-season flowers, Rhododendron Encore® Autumn Sunburst® is a compact evergreen re-blooming Azalea of upright, dense, rounded habit. Blooming in spring for a couple of weeks, then sporadically from midsummer to frost, Autumn Sunburst® produces single to semi-double, coral pink flowers, 2.5 in. across (7 cm), with white ruffled edges. They contrast beautifully with the evergreen foliage of elliptic green leaves. Cold hardy, sun tolerant, and low-maintenance, this repeat bloomer is perfect for containers, shrub borders, small hedges, as accent plants, or planted in mass. Ideal for small gardens.

‘Autumn Sunburst’ belongs to the Encore Series Azaleas which are all repeat bloomers. The quality and quantity of midsummer to fall bloom depend on the climate, location, and sun/shade balance of the plant.

  • Grows up to 2-3 ft. tall and wide (60-90 cm).
  • A part shade lover, this plant is easily grown in moist, acidic, humusy, well-drained soils. Tolerates full sun. In fact, 4-6 hours of direct sunlight or high filtered shade will ensure optimal blooming and growth. Plant shallowly. Protect from frost to prevent damage to flowers. Mulch annually with leaf mold to retain moisture, control weeds, and cool the soil.
  • Attracts butterflies, hummingbirds, and birds.
  • Removing spent flowers promotes new growth
  • Pruning should be done immediately after the spring flowering for maximum bud set. Light pruning of more established plants will stimulate growth and flowering. Prune tall shoots back inside the body of the plant. If you prune later in the year, you will be clipping off the buds that have set for the next bloom cycle.
  • All parts of the plant are poisonous if ingested.
  • Toxic to dogs, toxic to cats, toxic to horses.

Rhododendron and Azalea: How To Grow And Care with Success


Want to learn how to grow and care for rhododendron and azalea flowers like a pro? Follow these simple steps and enjoy their beauty

Requirements

Hardiness 6 - 10
Heat Zones 2 - 10
Climate Zones 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Shrubs
Plant Family Ericaceae
Genus Rhododendron
Common names Rhododendron
Exposure Full Sun, Partial Sun
Season of Interest Spring (Mid, Late)
Summer (Mid, Late)
Fall
Height 2' - 3'
(60cm - 90cm)
Spread 2' - 3'
(60cm - 90cm)
Spacing 36" (90cm)
Maintenance Low
Water Needs Average
Soil Type Clay, Loam, Sand
Soil pH Acid
Soil Drainage Moist but Well-Drained
Characteristics Showy, Evergreen
Tolerance Rabbit
Attracts Butterflies, Hummingbirds
Garden Uses Beds And Borders, Hedges And Screens, Patio And Containers, Small Gardens
Garden Styles Traditional Garden, Informal and Cottage, City and Courtyard
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Do I Need?
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Alternative Plants to Consider

Rhododendron Autumn Royalty
Rhododendron macrophyllum (Pacific Rhododendron)
Rhododendron alabamense (Alabama Azalea)
Rhododendron periclymenoides (Pinxterbloom Azalea)
Rhododendron catawbiense (Catawba Rosebay)
Rhododendron maximum (Great Laurel)

Recommended Companion Plants

Kalmia latifolia (Mountain Laurel)
Enkianthus campanulatus (Redvein Enkianthus)
Matteuccia struthiopteris (Ostrich Fern)
Aquilegia vulgaris var. stellata ‘Blue Barlow’ (Columbine)
Hydrangea arborescens ‘Annabelle’ (Smooth Hydrangea)
Dicentra spectabilis (Bleeding Heart)

Find In One of Our Guides or Gardens

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Add a Splash of Color: Perfect Flowering Shrubs for Small Gardens
40 Beautiful Native Shrubs for Shade
30 Best Spring Flowers to Spruce up Your Garden
Azalea and Rhododendron
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Rhododendron and Azalea: How To Grow And Care with Success
Great Hostas as Companion Plants for Azaleas and Rhododendrons
Great Bulbs and Perennials as Companion Plants for Azaleas and Rhododendrons
Best Shrubs as Companion Plants for Azaleas and Rhododendrons
Beautiful Azaleas and Rhododendrons for Northern California
Beautiful Azaleas and Rhododendrons for the Midwest
Beautiful Azaleas and Rhododendrons for the Pacific Northwest Region
Beautiful Azaleas and Rhododendrons for New England
Beautiful Azaleas and Rhododendrons for the Mid-Atlantic Region
Azaleas and Rhododendrons for Small Gardens
Extend the Blooming Season of your Azaleas and Rhododendrons
Azaleas and Rhododendrons with Attractive Fall Colors
Fragrant Azaleas and Rhododendrons
Hardiest Azaleas and Rhododendrons
Choosing Perfect Azaleas and Rhododendrons
Best Companion Plants for Azaleas and Rhododendrons
Azaleas and Rhododendrons: What is the Difference?
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 6 - 10
Heat Zones 2 - 10
Climate Zones 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Shrubs
Plant Family Ericaceae
Genus Rhododendron
Common names Rhododendron
Exposure Full Sun, Partial Sun
Season of Interest Spring (Mid, Late)
Summer (Mid, Late)
Fall
Height 2' - 3'
(60cm - 90cm)
Spread 2' - 3'
(60cm - 90cm)
Spacing 36" (90cm)
Maintenance Low
Water Needs Average
Soil Type Clay, Loam, Sand
Soil pH Acid
Soil Drainage Moist but Well-Drained
Characteristics Showy, Evergreen
Tolerance Rabbit
Attracts Butterflies, Hummingbirds
Garden Uses Beds And Borders, Hedges And Screens, Patio And Containers, Small Gardens
Garden Styles Traditional Garden, Informal and Cottage, City and Courtyard
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Rhododendron
Guides with
Rhododendron
Not sure which Rhododendron to pick?
Compare Now

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    Create a membership account to save your garden designs and to view them on any device.

    Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

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