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Azalea Fire Ball

Rhododendron (Azalea) x knaphill Fire Ball
Knaphill Azalea, Hybrid Rhododendron

4,3/5
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1 reviews

Thank you, these are not babies.

yvon, 16/02/2020

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This plant carries a 24 months recovery warranty

More information

Graden Merit
Deciduous bush, notable for its coppery foliage from spring to autumn and for its reddish-orange flowers. It will enhance the other plants in the background of an ericaceous bed
Flower size
7 cm
Height at maturity
1.50 m
Spread at maturity
1 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil
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Recommended planting time February to May, September to November
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Flowering time April to May
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Description

The 'Fire ball' Azalea, also known as the Hybrid Rhododendron, is a deciduous bush, notable for its coppery foliage from spring to autumn and its reddish-orange flowers. It will enhance other plants in the background of an ericaceous bed.

 

Originally from China, the 'Fire ball' Azalea has an upright habit and reaches a height of 1.50m (4 ft 11 in) with a spread of 1m when fully grown. Its coppery foliage consists of ovate and flexible leaves. During the months of April and May, the bush will offer you abundant flowering, filling your garden with clusters of bright reddish-orange flowers with well-developed pistils and stamens. Its brown stems will stand out from the leaves and flowers, adding structure to this exuberance, an event not to be missed!

Hardy down to -20°C (1°F) (and vigorous, the 'Fire ball' Chinese Azalea requires full sun or partial shade exposure. This slow-growing bush thrives in acidic, humus-bearing soil and prefers cool, humus-rich, and well-drained soil.

Plant the 'Fire ball' Azalea on a slope, in a rock garden, or in the middle of a bed alongside Pieris, Heather, Kalmias, Andromedas, and Japanese Maple.

 

Divided into 2 horticultural groups, the Rhododendron genus includes: Azaleas, Chinese and Japanese, with small evergreen or deciduous leaves and 5 stamens per flower: Rhododendrons, with large, evergreen, and glossy leaves, and flowers with more than 10 stamens. Although highly debatable from a botanical point of view, this classification is still widely used by horticulture professionals.

Azalea Fire Ball in pictures

Azalea Fire Ball (Flowering) Flowering
Azalea Fire Ball (Foliage) Foliage

Plant habit

Height at maturity 1.50 m
Spread at maturity 1 m
Habit Irregular, bushy
Growth rate normal

Flowering

Flower colour orange
Flowering time April to May
Flower size 7 cm
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Deciduous
Foliage colour green

Botanical data

Genus

Rhododendron (Azalea)

Species

x knaphill

Cultivar

Fire Ball

Family

Ericaceae

Other common names

Knaphill Azalea, Hybrid Rhododendron

Origin

Cultivar or hybrid

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Planting and care

Plant Azalea 'Fire ball' in full sun or partial shade, protected from cold and drying winds, in moist, humus-bearing and light soil with an acidic tendency. Like all plants that prefer acidic soil, it cannot tolerate limestone soils or heavy soils waterlogged in winter. Dig a hole three times larger than the pot. Soak the root ball in non-limestone water and plant the bush at the level of the collar, in a mixture composed of soil, leaf compost, gravel or pumice, and loam. Water generously and keep the soil moist in summer. Azaleas and Rhododendrons have a shallow root system, which makes them susceptible to long periods of drought. That's why it's recommended to enrich the soil with humus and provide abundant watering during drought periods. Additionally, this root system is not very strong, so it is essential to lighten heavy soils with draining materials (gravel, pumice, clay pellets) at planting. Apply a mulch of crushed pine bark around the base of the bush every spring to maintain soil moisture while preserving an acidic pH. Maintenance involves cutting off faded flowers in summer and removing dead branches. Azaleas and Rhododendrons can sometimes be attacked by weevils, which eat the edges of leaves and rootlets, as well as the infamous "rhododendron borer," which is rare, but can cause significant damage. Yellowing of leaves (chlorosis) in Rhododendrons indicates poor iron assimilation in the soil and can lead to premature death of the plant. While limestone is often the cause, poorly drained soil or deep planting can also explain the condition.

Planting period

Recommended planting time February to May, September to November

Intended location

Type of use Border, Container
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, drained and humus-bearing

Care

Pruning instructions Pruning is optional. After flowering, remove dead wood and if you need to, reduce the branches, do so sparingly, as severe pruning could jeopardise next year's flowering.
Pruning Pruning recommended once a year
Pruning time July to August
Soil moisture Moist soil
Overwinter Can be left in the ground
4,3/5
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