Autumn Sundance Encore® Azalea

Rhododendron ‘Roblef’ (PP#16,184)

Autumn Sundance Encore® Azalea

Rhododendron ‘Roblef’ (PP#16,184)


How are the heights measured?

All tree, and nothin' but the tree! We measure from the top of the soil to the top of the tree; the height of the container or the root system is never included in our measurements.

What is a gallon container?

Nursery containers come in a variety of different sizes, and old-school nursery slang has stuck. While the industry-standard terminology is to call the sizes "Gallon Containers", that doesn't exactly translate to the traditional liquid "gallon" size we think of. You'll find we carry young 1-gallons, up to more mature 7-gallons ranging anywhere from 6 inches to 6ft.

How does the delivery process work?

All of our orders ship via FedEx Ground! Once your order is placed online, our magic elves get right to work picking, staging, boxing and shipping your trees. Orders typically ship out within 2 business days. You will receive email notifications along the way on the progress of your order, as well as tracking information to track your plants all the way to their new home!

Why are some states excluded from shipping?

The short & sweet answer is: "United States Department of Agriculture Restrictions." Every state has their own unique USDA restrictions on which plants they allow to come into their state. While we wish we could serve everyone, it's for the safety of native species and helps prevent the spread of invasive disease & pests. We've gotta protect good ole' Mother Nature, after all.

About Me


The Autumn Sundance™ Encore® Azalea is a wonderful medium-sized shrub, growing to 3½ feet tall and 4 feet across. It is fast-growing, adding about 10 inches of new growth every year when young. Its vibrant pink-red flowers are produced more or less continuously from April to the first frost, with the greatest concentration from April to July, just when you want your garden to be bursting with blooms. It is hardy from zone 6 on, and it makes a wonderful foundation plant, informal barrier or low screen, and it grows well in woodland areas too, bringing color to those lightly-shaded spots.

  • Vibrant pink-red flowers with fascinating markings in dark red
  • Blooms all the way from April to the first frost
  • Ideal medium size with many uses in the garden
  • Easily grown even in zone 6
  • More sun tolerant than other evergreen azaleas

The Autumn Sundance Encore Azalea grows well in full sun all day long in cooler areas, and in morning sun with afternoon shade in hotter zones. It will also grow well in partial shade and light full shade too. It thrives in moist, well-drained soil, and only tolerates a very little dryness in summer when mature. It should be grown in acid soil with a pH no higher than 6.5, and preferably lower. If you don’t have acid soil, grow it instead in a pot or planter box, using soil recommended for acid-loving plants. It doesn’t have any significant pests or diseases and is easy and trouble-free if you have suitable soil conditions.

Plant Hardiness Zones 6-9
Mature Width 4
Mature Height 3-0
Sun Needs Full Sun, Partial Sun
Zones 6-9

There is so much choice among the Encore Azaleas, it can be hard to settle on one to grow. Apart from the obvious solution of buying them all (which we recommend of course), a good approach is to look at the unique features of each, and then to see if those satisfy some specific need you have. Take the Autumn Sundance™ Encore® Azalea as an example. This beautiful shrub has gorgeous rich pink flowers, that will look wonderful with pale pinks, purples, and purple-reds. Are those colors you already have in other plants in your garden? If they are, then that is a positive tick for this variety.

There is also a unique feature in the foliage, because almost all the Encore Azaleas have plain green leaves. This one has reddish leaves in winter, which will add some subtle color at that quiet season, and if your garden is a bit too ‘green’ all winter, then you now have a great way to change that. Also, not all the Encore Azaleas do well in zone 6, where winter cold can brown foliage and kill buds. Autumn Sundance is perfectly hardy in a sheltered spot in zone 6, so if that is where you live it’s a big positive. If all this is beginning to sound interesting to you, then read on. . .

Growing Autumn Sundance™ Encore® Azaleas

The Autumn Sundance Encore Azalea is a fast-growing shrub, much faster growing than other evergreen azaleas you might have grown before. It will soon reach its mature height of 3½ feet and spread about 4 feet wide. With dense branching right to the ground, and small green leaves covered in tiny hairs, it looks lovely even when not in bloom. Those leaves are 2 to 3 inches long, and up to 1 inch wide, and in winter they take on a reddish tone, which is a great way of adding some richness to a planting that is green all winter. The soft hairs begin white and turn darker as the leaf matures, as on mature leaves they are mostly found along the veins and leaf-stem.


The Autumn Sundance Encore Azalea has an extremely long and continuous blooming season. The first buds open in profusion in early April and continue into May. As the new growth begins, shoots 5 to 6 inches long grow out, and they rapidly produce new flower buds, so that many more flowers are seen from mid-June to the end of July. Further shoots, 4 to 5 inches long then develop, and these too carry buds and flowers, right up until the first frost. As the weather begins to cool in early fall an increasing number of buds become dormant, so that by the end of fall there are many dormant buds, ready and waiting to blossom in the following spring. These endlessly-produced flowers are large, open trumpets, a full 3 inches across, in a rich pink-red color. There are five petals in the open flower, and the lower three are attractively steaked and spotted in darker shades of red. A bush in flower certainly has lots of visual impact.

Planting Location

Plant the Autumn Sundance Encore Azalea in full sun in zones 6 and 7, and in morning sun in zones 8 and 9. Some afternoon shade is beneficial in the hottest areas. In all zones this plant will grow in partial shade too, and in light full shade, such as along the foot of a north-facing wall, or in the dappled shade from open deciduous trees. It is a wonderful addition to the foundation planting around your home, among other shrubs in a partially-shade bed, bordering a wooded area, or as an informal barrier or low screen anywhere in the garden. If you want to create a continuous row, plant about 3 feet apart.

Soil Conditions

The Autumn Sundance Encore Azalea should be planted in moist but well-drained soil that is rich in organic material and humus, and is acidic. For best growth of all azaleas the soil should have a pH of 6.5 or less. If you don’t have acid soil, then the easiest way to grow this plant is in a planter box or pot, using soil for acid-loving plants. Fertilize regularly with liquid food for azaleas. Even mature plants will live well in pots for many years, as long as you feed them, and water when the top ½ inch of soil is dry. The pot must have a drainage hole. Growing them in pots means you can easily move your plants around, and even bring them into a porch during cold spells, and that way you can grow them successfully even in much colder zones.

History and Origins of the Autumn Sundance™ Encore® Azalea

The Encore Azaleas have an interesting history. They began with some seedlings of a plant, Rhododendron oldhamii, collected in Taiwan and sent to America as seed in 1968. It caught the attention of experts because it blooms continuously through summer, not just in spring. One plant with red flowers was named ‘Fourth of July’ because it had flowers in July, and this plant was used by Robert E. “Buddy” Lee, from Independence, Louisiana, in a breeding program. As part of this he took pollen from it to pollinate a plant of an evergreen hybrid azalea called ‘Karen’. Among the resulting seedlings was a plant he spotted in 1995, with beautiful flowers and compact growth, which flowered almost continuously from spring to frost. This became the Autumn Sundance Azalea, and it was patented in 2006 under the name ‘Roblef’.

Our plants are produced by the original nursery, which ensures perfect continuity from the original variety via stem cuttings, plus top-quality production by experienced growers. The Encore Azaleas are hugely popular, and with its powerful flower color and great growth, Autumn Sundance is one of the most popular of all. Our stock will not last long, so order now.

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Autumn Sundance Encore® Azalea

Rhododendron ‘Roblef’ (PP#16,184)