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Buddleja davidii Reve de Papillon Blue - Butterfly bush

Buddleja davidii 'Srp18blu20' Reve de Papillon® Blue
Butterfly Bush, Summer Lilac

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This plant carries a 24 months recovery warranty

More information

This cultivar of butterfly bush stands out with its large panicles of fragrant dark blue flowers that bloom abundantly from July through to September. The bush develops a bushy silhouette, reaching about 2m in height in open ground and branches well in large pots. Hardy down to -20°C, it prefers sunny positions and well-drained soil.
Flower size
30 cm
Height at maturity
2 m
Spread at maturity
1.50 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -20°C
Soil moisture
Dry soil, Moist soil
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Best planting time March, October
Recommended planting time March to May, October to November
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Flowering time July to September
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Description

Buddleja davidii Rêve de Papillon® Blue ('Srp18blu20') is a summer-flowering shrub that is generous and long-lasting. This butterfly bush captivates with its large panicles of fragrant dark blue flowers, which attract butterflies and pollinators from July to September. Its naturally bushy habit, good branching and moderate development (approximately 2 m tall in open ground) suit small gardens, shrub borders and flowering hedges, or pots on the terrace.

Buddleja Rêve de Papillon® Blue is a shrub from the Scrophulariaceae family. This cultivar 'Srp18blu20' is a sterile horticultural creation developed by Star Roses & Plants, an American company specialising in the selection of ornamental plants. It was introduced to the European market by Hortival Diffusion. The Rêve de Papillon® series brings together varieties selected for their floribundus nature and their compact, well-branched habit from the base. These plants, which do not produce seeds, are not invasive, they stay in their place!

Buddleja davidii Rêve de Papillon® Blue 'Srp18blu20' is a shrub with a bushy, well-branched habit that develops flexible stems. In open ground, it reaches approximately 2 m in height with a 1.5 m spread after 10 years of cultivation. In a pot, its size is generally reduced, around 1.20 m to 1.50 m in height, depending on the growing conditions. With rapid growth, it establishes itself quickly in landscape designs. The flowers are tightly packed on long terminal panicles of 25-30 cm, they are dark blue to lavender blue and emit a sweet, sugary fragrance. The flowering period extends from July to September. The foliage is formed of opposite, lanceolate, 10 to 15 cm long leaves, with an entire margin, blue-green on the upper side and paler underneath. The leaves are deciduous; they fall in autumn and reappear in spring. The stems are quadrangular, light brown, and become more woody with age. The bark is smooth on young shoots and becomes slightly fissured on older branches. 
This cultivar is hardy down to -20°C.

Buddleja Rêve de Papillon Blue, superb in a large container on the terrace, is an ornamental bush that easily fits in any garden, even when space is limited. It integrates into a shrub border and looks good in a flowering hedge. Its association with large weigelas like 'Rosea' or 'Alexandra', Vitex and shrubby English roses such as 'The Ancient Mariner' is interesting for animating the garden until late summer.

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The complete guide to growing butterfly bush
Family sheet
by Virginie T. 14 min.
The complete guide to growing butterfly bush
Read article

Buddleja davidii Reve de Papillon Blue - Butterfly bush in pictures

Buddleja davidii Reve de Papillon Blue - Butterfly bush (Flowering) Flowering
Buddleja davidii Reve de Papillon Blue - Butterfly bush (Plant habit) Plant habit

Plant habit

Height at maturity 2 m
Spread at maturity 1.50 m
Habit irregular, bushy
Growth rate fast

Flowering

Flower colour blue
Flowering time July to September
Inflorescence Panicle
Flower size 30 cm
Fragrance Fragrant
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour green

Botanical data

Genus

Buddleja

Species

davidii

Cultivar

'Srp18blu20' Reve de Papillon® Blue

Family

Scrophulariaceae

Other common names

Butterfly Bush, Summer Lilac

Botanical synonyms

Buddleja davidii 'Srp18blu20' REVE DE PAPILLON® BLUE

Origin

Cultivar or hybrid

Product reference24718

Planting and care

Buddleja Rêve de Papillon® Blue is easy to grow, as it is an undemanding plant regarding soil, very hardy and not water-greedy. It enjoys sunny spots but also flowers in partial shade. 
Plant it in spring or early autumn in ordinary soil, even chalky and poor, but well-worked, well-loosened and properly drained. Once well-established in open ground, the plant will tolerate periods of moderate drought.
However, if grown in a pot or container, you should water it regularly and provide fertiliser for flowering bushes. Buddleja has no significant pests. Nevertheless, beware of caterpillars, vine weevils, bugs and red spider mites that can invade it under certain conditions.

Planting period

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

Intended location

Suitable for Meadow, Woodland edge
Type of use Border, Small gardens, Container, Hedge
Hardiness Hardy down to -20°C (USDA zone 6b) Show map
Ease of cultivation Beginner
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Any
Soil type Chalky (poor, alkaline and well-drained), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, Any well-drained soil

Care

Pruning instructions Vigorous pruning after flowering and/or in early spring maintains a compact, branched habit and encourages the bush to produce abundant flowers.
Pruning Pruning recommended once a year
Pruning time March to April, October
Soil moisture Dry soil, Moist soil
Disease resistance Good
Overwinter Can be left in the ground

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