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Azalea japonica ENCORE Sweetheart Roblja

Rhododendron (Azalea) japonica ENCORE® Sweetheart 'Roblja'
Japanese Azalea

5,0/5
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I bought 4 Encore azaleas, attracted by the promise of two flowerings. Only one has bloomed and is thriving (although it only flowered once), but the other 3 (I had reservations as I found them weak and on the verge of drying out from the beginning) have been completely dead for a long time. I would like a refund as I will not repurchase this variety, even though I still have one. Thank you.

Jeanine, 06/04/2022

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This plant carries a 24 months recovery warranty

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Value-for-money
A pastel-coloured Azalea from the ENCORE series, which brings together varieties capable of flowering at least twice a year: first from March to June, then again in September-October. They can even flower a third time from July to August if the climate is right. Unlike traditional Japanese Azaleas, these hybrids can also be grown in the sun. 'Sweetheart' forms a beautiful bush about 1.20 m (3 ft 11 in) high by 1 m (3 ft 4 in) in spread, very decorative with its small evergreen foliage and its flowers of a soft mauve-pink colour. Grow in lime-free, rich, moist but well-draining soil. Hardiness: -12/-15°C (10.4/5 °F).
Flower size
6 cm
Height at maturity
1.20 m
Spread at maturity
1 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -12°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time March to May, September to October
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Flowering time April to May, July to August, October
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Description

The Encore 'Sweetheart' Hybrid Azalea, has lovely soft mauve-pink flowers that bloom two or three times a year depending on the climate. It belongs to the Encore series, which has transformed the Japanese Azalea into a plant that is almost as decorative as a rose, with successive and spectacular flowerings. This beautiful evergreen bush blooms from late winter or early spring until early autumn, in successive waves. Thriving in the sun or partial shadeand relatively hardy, the hybrid Azaleas from the Encore series are very versatile and come in a variety of styles, with single or double flowers, more or less compact and in a range of colours including white, red, various shades of pink, salmon, and orange vermillion. Mix them together to create either rustic flower beds or more sophisticated displays. Like all Azaleas, 'Sweetheart' prefers non-calcareous soils, moist but well-draining, and fertile enough to sustain its multiple flowerings.

 

From a botanical point of view, Azaleas are actually Rhododendrons, plants from the large Ericaceae family. The hybrids from the Encore series, distributed by Globe Planter, were created thanks to Buddy Lee, a talented American nurseryman specializing in these plants. These quite fantastic azaleas are the result of a long process of hybridization and selection, with the aim of obtaining varieties capable of flowering several times a year, as well as withstanding the sun.

'Sweetheart' is a beautiful variety of considerable size, with a rather upright and bushy habit, and informal appearance. The bush reaches about 1.20 m (3 ft 11 in) in height and 1 m (3 ft 4 in) in spread, growing rather slowly, though slightly faster than the classic Japanese Azaleas. Its particularly abundant first flowering begins in March-April taking the form of single or, more rarely, semi-double, satiny, slightly wavy flowers . They are about 5-6 cm (2-2.4 in) in diameter, and are a soft pink tending towards mauve, fading slightly when fully open. They are funnel-shaped and are gathered in small terminal clusters. A second wave of flowers, slightly less generous, begins at the end of May, when new shoots appear, carrying new flower buds that open in summer. A last flowering occurs in early autumn, usually in October. The foliage of the Japanese Azalea, more or less evergreen depending on the severity of the winter, is composed of small, simple, glossy, elliptical leaves with smooth edges, arranged alternately on the branches. They are a rather light green in spring, darkening in summer, often taking on beautiful bronze or purple shades in cold weather. This variety is hardy down to -12/-15°C (10.4/5 °F). Azaleas and Rhododendrons have a shallow root system that always needs to be kept moist, but they also dislike waterlogged soil which would suffocate the roots.

 

Japanese azaleas thrive in cool climates with distinct winters, planted in humus-rich and acid soil, such as ericaceous soil. In these conditions, they are very beautiful evergreen shrubs for flower beds or flowering pots, attractive all year round. They harmonise beautifully with heathers, Japanese maples, or their relatives, Chinese Azaleas, which change their colours with the seasons. Combine them with flowering quinces, Japanese camellias, and their graceful, often fragrant, autumn-flowering cousins, the Camellia sasanqua hybrids. This 'Sweetheart' variety will look wonderful in a large, cool, moist rockery or flower bed with Chinese azaleas, perennial geraniums, or paniculate hydrangeas.  It will also make a beautiful suject in a pot to adorn a terrace or balcony, planted in suitable soil and watered with lime-free water.

 

 

Azalea japonica ENCORE Sweetheart Roblja in pictures

Azalea japonica ENCORE Sweetheart Roblja (Flowering) Flowering
Azalea japonica ENCORE Sweetheart Roblja (Foliage) Foliage
Azalea japonica ENCORE Sweetheart Roblja (Plant habit) Plant habit

Plant habit

Height at maturity 1.20 m
Spread at maturity 1 m
Habit Irregular, bushy
Growth rate normal

Flowering

Flower colour pink
Flowering time April to May, July to August, October
Inflorescence Cyme
Flower size 6 cm

Foliage

Foliage persistence Evergreen
Foliage colour dark green

Botanical data

Genus

Rhododendron (Azalea)

Species

japonica

Cultivar

ENCORE® Sweetheart 'Roblja'

Family

Ericaceae

Other common names

Japanese Azalea

Origin

Cultivar or hybrid

Product reference887811

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Planting and care

The Encore hybrid Azalea does well in sun (not too intense), but its favourite position is in partial shade, especially in hot and very sunny regions. Plant it in a humus-rich and well-drained, alkaline-free soil. When planting, make sure not to bury the root ball too deep, it should be level with the surface of the soil. Water copiously with lime-free water during dry periods, at least once a week in the first year. In spring, apply fertilizer for ericaceous plants. Pruning is not essential but it is a good idea to prune lightly after flowering to keep the plant looking neat. Remove spent flowers to encourage new growth. The Azalea suffers from very few diseases when well established outdoors. It can be attacked by weevils that eat the edges of the leaves and rootlets, and by the famous "Rhododendron lace bug", not often causing significant damage. If the soil is chalky or poorly drained, and if the root ball is planted too deep, the leaves may turn yellow and eventually die. Japanese Azaleas do not tolerate the dry environments of our interiors at all.

Planting period

Best planting time March, October
Recommended planting time March to May, September to October

Intended location

Suitable for Meadow, Woodland edge
Type of use Border, Edge of border, Container
Hardiness Hardy down to -12°C (USDA zone 8a) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Acidic
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, Humus-rich, well-drained

Care

Pruning instructions Pruning is optional. After the first flowering, remove dead wood and if you need to limit the branches, do so sparingly, as severe pruning could compromise future flowerings.
Pruning Pruning recommended once a year
Pruning time May
Soil moisture Moist soil
Disease resistance Good
Overwinter Can be left in the ground
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