Buddleja davidii Purple Emperor Pyrkeep - Butterfly Bush
Buddleja davidii Purple Emperor Pyrkeep - Butterfly Bush
Buddleja davidii Purple Emperor Pyrkeep - Butterfly Bush
Buddleja davidii Purple Emperor Pyrkeep - Butterfly Bush
Buddleja x davidii Purple Emperor 'Pyrkeep'
Butterfly Bush, Summer Lilac
Plant in shape, with beautiful scented flowers.
Lena, 04/10/2023
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Description
Buddleja davidii Purple Emperor 'Pyrkeep' is a compact-sized butterfly bush, with dense foliage and a beautiful summer to autumn flowering. It takes the form of large panicles of purple flowers with red-orange hearts, constantly animated with butterflies. This bush is spectacular in full bloom and has beautiful deciduous green and velvety foliage with a grey underside. Its modest size allows for easy integration into a small garden, in a shrub border, in a flowering hedge and in a container on a patio.
Buddleja davidii Purple Emperor 'Pyrkeep' is a deciduous bush with a spreading and compact habit belonging to the Scrophulariaceae (buddleja) family. This cultivar is derived from David's Buddleja, also known as Father David's Buddleja or Changing Buddleja, a robust Chinese species that has become invasive in our climate. 'Pyrkeep' is part of the "English Butterfly Series", a collection of cultivars selected by Elizabeth Keep, including 'Peacock', 'Adonis Blue' and 'Marbled White'. Each one is named after a species of butterfly commonly found in the UK and boasts particularly large panicles of flowers, carried on bushy and compact plants. Purple Emperor pays homage to the Purple Emperor butterfly (Apatura iris), thanks to its inflorescences of intense purple. It will reach approximately 1.5 m (4.9 ft) in height with a similar spread in 4 or 5 years. It produces sturdy, branched and arching stems that give it a beautiful bushy and open habit. It flowers from July to September, producing an abundance of dense panicles of flowers measuring 15 cm to 25 cm (5.9 in to 9.8 in) long. These flowers are purple-violet with an orange eye and release a sweet fragrance, very attractive to pollinators. Its ornamental foliage is composed of long, soft green leaves, with a greyish down on the underside. The leaves, measuring 12 cm to 20cm (4.7 in to 7.9 in) long, are pointed and lanceolate. This very hardy bush is resistant to urban pollution and does not suffer from occasional drought in deep soil.
Whether planted individually or in groups, in a hedge or at the back of a perennial border, Buddleja davidii Purple Emperor 'Pyrkeep' will enhance the garden. Its purple inflorescences highlight the flowers of roses in red, mauve or pink tones, as well as the colourful panicles of summer lilacs. You can also plant it in a small, informal hedge to separate themed areas in the garden. It adapts well to coastal areas and can be grown in large pots. Its fragrant flowers are also very attractive in bouquets. You can plant it alongside Japanese Spireas or with tall grasses (Miscanthus, Panicum, Deschampsia) for an elegant contrast.
Buddleja davidii Purple Emperor Pyrkeep - Butterfly Bush in pictures
Plant habit
Flowering
Foliage
Botanical data
Buddleja
x davidii
Purple Emperor 'Pyrkeep'
Buddlejaceae
Butterfly Bush, Summer Lilac
Cultivar or hybrid
Planting and care
It is easy to grow, as it is a low-maintenance plant that adapts to a wide range of soils and climates. It enjoys sunny spots, but also flowers in partial shade. Plant it in spring or early autumn, in ordinary soil, even limestone and poor soil, but well-worked and well-drained. Once well established, the plant will tolerate periods of moderate drought. David's buddleja has no significant enemies. However, be careful of caterpillars, weevils, and red spider mites that can invade it. Pruning vigorously after flowering and/or in early spring maintains its ramified and compact habit and encourages the bush to produce numerous flowers.
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).
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 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.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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