Rhododendron Homebush - Knaphill Azalea
Rhododendron Homebush - Knaphill Azalea
Rhododendron Homebush - Knaphill Azalea
Rhododendron Homebush - Knaphill Azalea
Rhododendron (Azalea) x knaphill Homebush
Knaphill Azalea, Hybrid Rhododendron
Original plant with its pom-pom flowers. It looks good in the flowerbed.
Brice, 06/05/2026
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Description
Rhododendron 'Homebush' is also known as an Azalea. It is a deciduous bush, identifiable by its semi-double spring flowering, in a nearly perfect magenta ball. It will be ideal as a standalone specimen or in a group.
Originally from China, the 'Homebush' Azalea has an erect habit and reaches a height of 1.50m (4 ft 11 in) with a spread of 1m when fully grown. It has light green, oval and flexible foliage, with a well-marked midrib. During the months of April and May, this variety will stand out from the others with its bouquet-like flowering of small semi-double flowers forming balls of magenta-pink flowers. It will surprise you! Its stems are brown, contrasting with the leaves and flowers.
Hardy down to -20°C and vigorous, the 'Homebush' Azalea will appreciate a sunny or semi-shaded exposure. This bush likes moist, humus-rich, and well-drained soils with an acidic tendency.
Plant the 'Homebush' Azalea in borders of humus-rich soil, on a slope or a rockery to enjoy its astonishing flowering, alongside Pieris, Heath, Kalmias, Andromedas, and Japanese Maple.
The rhododendron genus is divided into 2 horticultural groups: Azaleas, Chinese and Japanese, with small evergreen or deciduous leaves, equipped with 5 stamens per flower: Rhododendrons, with ample, evergreen, and glossy foliage, whose flowers have more than 10 stamens. Although highly debatable from a botanical point of view, this classification is still widely used by horticulture professionals.
Rhododendron Homebush - Knaphill Azalea in pictures
Plant habit
Flowering
Foliage
Botanical data
Rhododendron (Azalea)
x knaphill
Homebush
Ericaceae
Knaphill Azalea, Hybrid Rhododendron
Cultivar or hybrid
Planting and care
Plant Azalea 'Homebush' in full sun or partial shade, protected from cold and drying winds, in a cool, humus-bearing, light soil with an acidic tendency. Like all plants that prefer ericaceous soil, it does not tolerate chalky or heavy soils that become waterlogged in winter. Dig a hole three times larger than the pot. Soak the root ball in non-chalky water and plant the bush at the level of the collar in a mixture composed of organic matter, leaf mold, gravel or pumice, and loam. Water thoroughly and keep the soil moist in summer. Azaleas and Rhododendrons have a shallow root system, so they are susceptible to long periods of drought. Enrich the soil with humus and provide abundant watering during dry periods. Additionally, this weak root system necessitates lightening heavy soils with draining materials (gravel, pumice, clay pellets) at planting. Apply a mulch of shredded pine bark around the base of the bush every spring to maintain soil moisture while preserving an acidic pH. Maintenance consists of removing faded flowers in summer and pruning out dead branches. Azaleas and Rhododendrons can sometimes be attacked by weevils that eat the edges of leaves and rootlets, as well as the famous "rhododendron beetle," which rarely causes significant damage. Yellowing of leaves (chlorosis) in Rhododendrons indicates poor iron assimilation in the soil and can lead to premature plant death. While limestone is often the cause, poorly drained soil or deeply planted root balls can also explain this condition.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.