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Agapanthus hybridus Vallée de la Romanche

Agapanthus x hybridus Vallée de la Romanche
African Lily, Lily of the Nile

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More information

This Agapanthus, not very tall but very floriferous, produces numerous umbels of light blue flowers between June and August. Its flowers rise above a beautiful clump of ribbon-shaped leaves that persist in winter. Very decorative in pots as well as in the ground, it will create elegant borders or very flowered pots. Semi-hardy (-7°C (19.4°F)), this variety succeeds particularly well by the seaside. To be grown in the sun, in a good, rich and well-drained garden soil. Good resistance to heat and drought.
Flower size
10 cm
Height at maturity
70 cm
Spread at maturity
40 cm
Exposure
Sun
Hardiness
Hardy down to -6°C
Soil moisture
Dry soil, Moist soil
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Best planting time April
Recommended planting time March to May
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Flowering time June to August
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Description

Agapanthus 'Vallée de la Romanche' is a compact and floriferous selection that offers a charming light blue flowering between June and August. Its flower umbels rise above a beautiful tuft of ribbon-like leaves that remain decorative in winter. Like all evergreen Agapanthus, this variety is not very hardy, but less demanding in water than deciduous varieties. Particularly suited to the Atlantic coast or the Mediterranean coast, this selection also adapts perfectly to pot cultivation, allowing it to be overwintered in colder regions. 

Agapanthus are plants of the lily family native to South Africa. Several species have been extensively hybridized by horticulturists in search of new colours, more compact and hardy plants, better adapted to our climates. The cultivar 'Vallée de la Romanche' was selected by P. Turc in Anjou, France. This variety is named after a torrent becoming a river in southeastern France, irrigating the Hautes-Alpes and Isère. This perennial plant develops and multiplies rapidly from a fleshy rhizome stump, forming over time a dense clump of linear foliage, of a fairly dark green, about 40cm (16in) in all directions. The flowering, prolonged, more or less early depending on the regions, extends over about two months. Numerous cylindrical floral stems about 60-70cm (24-28in) tall emerge from the foliage clump. They bear at their tip small hemispherical umbels composed of trumpet-shaped flowers. Each one is composed of 6 petals fused into a tube at the base, of a pale lavender blue, crossed by a darker line, contrasting with almost black stamens. The foliage of this variety remains in winter. 

Agapanthus 'Vallée de la Romanche' is planted in drifts, in large borders or in pots. It brings a touch of exoticism to the garden or terrace and fits well into a contemporary decor. This new variety will easily adapt in our mild regions, especially if its stump is protected by a thick mulch in winter. It is particularly suited to coastal climates. 'Vallée de la Romanche' is very beautiful, associated with other compact varieties in shades of blue, mauve or white, in a minimalist style. It is also very decorative in ensembles with an exotic connotation with DianellaKniphofiasHemerocallisgrasses and Cannas.

Agapanthus hybridus Vallée de la Romanche in pictures

Agapanthus hybridus Vallée de la Romanche (Flowering) Flowering
Agapanthus hybridus Vallée de la Romanche (Foliage) Foliage

Flowering

Flower colour blue
Flowering time June to August
Inflorescence Umbel
Flower size 10 cm
Good for cut flowers Cut flower blooms
Flowering description Umbels of pale lavender blue.

Foliage

Foliage persistence Deciduous
Foliage colour green
Foliage description Evergreen.

Plant habit

Height at maturity 70 cm
Spread at maturity 40 cm
Growth rate normal

Botanical data

Genus

Agapanthus

Species

x hybridus

Cultivar

Vallée de la Romanche

Family

Alliaceae - Liliaceae

Other common names

African Lily, Lily of the Nile

Origin

Cultivar or hybrid

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Planting and care

Plant the stumps of Agapanthus 'Vallée de la Romanche'  by covering them with at least 10cm (4in) of good soil, this way they will better withstand the cold. It is essential to plant them in spring and preferable to mulch them in winter in most of our regions. For pot culture, use 5 young plants for a 24cm (9in) pot and protect your pots in winter. They prefer a rich and moist, but well-drained soil, enriched with sand. Water them regularly during the growth period (twice a week). However, avoid watering them afterwards. They fear winter humidity excess. This variety is hardy up to approximately -7 °C in sheltered exposure, it withstands heat well, is water-efficient, and particularly thrives by the seaside. Its foliage can be damaged at -3°C. Use a sandy, well-drained, slightly acidic mixture. This plant seems to prefer shallow but wide containers and will flower abundantly if regularly fed with slow-release fertilizer.

Planting period

Best planting time April
Recommended planting time March to May

Intended location

Suitable for Meadow
Type of use Border, Edge of border, Container, Greenhouse, Conservatory
Hardiness Hardy down to -6°C (USDA zone 9a) Show map
Ease of cultivation Amateur
Planting density 3 per m2
Exposure Sun
Soil pH Neutral
Soil type Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, Rich and well-drained

Care

Pruning No pruning necessary
Disease resistance Good
Overwinter Can be left in the ground

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