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Robinia hispida Rosea - Rose acacia

Robinia hispida (elliottii) Rosea
Rose acacia, Bristly Locust

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22/10/2019 around 4:25 pm - Contact: Very lovely bush, commonly known as "ACACIA" Hispida Roséa. It flowers twice a year, in June and August, with beautiful pink flowers..... But the branches are very brittle; due to the wind or the weight of the flowers during the flowering period.................. Such a shame! My tree is already 40 years old, and it has almost no branches left, only the trunk which is between 15 and 20 cm (6 and 8in) in diameter and 1.5 meters (5 feet) tall.... Can it be grafted with scions from its own branches??? I would like to save my beloved tree...............

Michel, 22/10/2019

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More information

This deciduous small tree resembles an acacia, with its light and finely-cut foliage, as well as its flowering in clusters of papilionaceous dark pink flowers. But this one blooms in spring, and again in late summer, in a lovely dark pink colour. Native to the dry undergrowth of the Southeastern United States, this 3 metre (10ft) deciduous tree is naturally resistant to summer drought and thrives in poor soils. Provide it with a very sunny exposure and well-drained soil!
Flower size
12 cm
Height at maturity
2.75 m
Spread at maturity
2.50 m
Exposure
Sun
Hardiness
Hardy down to -29°C
Soil moisture
Dry soil, Moist soil
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Best planting time February, October
Recommended planting time September to November
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Flowering time May to June, August to September
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Description

Robinia hispida 'Rosea' is commonly known as the Rose Acacia. Its light and finely-cut foliage, its flowering in clusters of papilionaceous flowers, and its excellent adaptability to poor soils are all characteristics that bring together members of the Fabaceae family. This Robinia, which does not exceed three metres in height, blooms abundantly in spring, and again in late summer, in a lovely dark pink colour. Naturally resistant to summer drought and not demanding in terms of soil, this Robinia is a boon for dry or natural gardens.

 

Robinia hispida (synonym Robinia elliottii) is native to the dry undergrowth of the Southeastern United States. Fabaceae are capable of assimilating nitrogen in its atmospheric form and not in its organic form, allowing them to grow in nutrient-poor soils. The 'Rosea' cultivar stands out for its darker pink colour in its flowering. It quickly reaches a height of 1.80 metres (6ft), then its growth slows down. It will reach an average height of 2.75 metres (9ft) at maturity, with a spread of 2.50 metres (8ft). Its habit is fairly loose and overall rounded. It develops one or more thin trunks and a sparsely leafy crown, carried by brittle branches. The branches of this Robinia are glandular and covered with brown spines. Its deciduous leaves, 15cm (5.9in) long, are divided into 10 to 13 small leaflets, in a tender light green colour. The flowering takes place in May-June and often again in August-September, on relatively young individuals. The pendulous and generous inflorescences, 10 to 20cm (3.9 - 7.9in) long, are produced abundantly. They are composed of numerous dark pink papilionaceous flowers that go perfectly with the light green foliage. This flowering attracts pollinating insects. It is followed by the formation of flat, hairy pods, 6 to 8cm (2.4 - 3.1in) long, containing brown seeds.

 

This Rose Robinia is suitable for both small and large gardens. Planted alone in the centre of a bed, it also thrives on slopes or in informal and defensive hedges. You can place it against a background of evergreen shrubs or conifers (cypress, thuja, yew, junipers), surrounded by roses that often bloom simultaneously. It can also be associated, in a flowering grove and in poor soil, with other undemanding and highly ornamental trees or shrubs such as Sophora davidii, Laburnum cytisus, Indigofera gerardiana, Colutea arborescens ...

Robinia hispida Rosea - Rose acacia in pictures

Robinia hispida Rosea - Rose acacia (Flowering) Flowering
Robinia hispida Rosea - Rose acacia (Foliage) Foliage

Plant habit

Height at maturity 2.75 m
Spread at maturity 2.50 m
Habit Irregular, bushy
Growth rate fast

Flowering

Flower colour pink
Flowering time May to June, August to September
Inflorescence Cluster
Flower size 12 cm
Bee-friendly Attracts pollinators
Fruit colour black

Foliage

Foliage persistence Deciduous
Foliage colour light green

Botanical data

Genus

Robinia

Species

hispida (elliottii)

Cultivar

Rosea

Family

Fabaceae (Papilionacea)

Other common names

Rose acacia, Bristly Locust

Origin

Cultivar or hybrid

Product reference8429011

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Planting and care

Robinia hispida 'Rosea' thrives in the sun, sheltered from strong winds and sea spray as its branches can be very brittle and the wind can damage its flowering. The soil should be light and well-drained, even poor, preferably moist even though this plant tolerates summer drought very well once established. In reality, it has few soil requirements, performing well in clay soils if properly drained. Its resistance to atmospheric pollution is excellent, making it valuable in urban areas. From August to October, prune dead or weak wood to prevent sap flow. Also remove branches that cross within the canopy to maintain the proper habit of the Robinia. Beware of voles, which greatly enjoy the bark and attack the base of plants.

Planting period

Best planting time February, October
Recommended planting time September to November

Intended location

Suitable for Meadow
Type of use Border, Free-standing
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Beginner
Planting density 1 per m2
Exposure Sun
Soil pH Neutral, Any
Soil type Chalky (poor, alkaline and well-drained), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, Ordinary but well-drained soil, even poor.

Care

Pruning instructions From August to October, prune any dead or weak wood if necessary to prevent sap leakage. Also remove any branches that are crossing within the branches to maintain the proper habit of the Robinia. It should be noted that this bush is capable of regrowing from the base if the wind causes the entire branches to break.
Pruning Pruning recommended once a year
Pruning time August to October
Soil moisture Dry soil, Moist soil
Disease resistance Good
Overwinter Can be left in the ground
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