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Delphinium Ouvertüre - Larkspur

Delphinium Pacific-hybrid Ouvertüre
Larkspur, Perennial Larkspur

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More information

Delphinium 'Ouvertüre' has large medium blue flowers with pink highlights and a black heart. Its spectacular flowering continues for 2 months in rich and moist soil.
Height at maturity
2 m
Spread at maturity
50 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -29°C
Soil moisture
Moist soil
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Recommended planting time February to April, September to November
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Flowering time June to July
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Description

Delphinium Ouverture has large spikes of medium blue flowers with pink highlights and a black heart. Its spectacular flowering lasts for 2 months during the summer if the soil is rich and moist. This imposing plant has rapid growth but a short life.

The Pacific Delphiniums are hybrids obtained in California, remarkable for the size of their inflorescences, ranging from 1m (3ft) to 1.20m (4ft) long, carried by numerous stems reaching a height of 1.80-2m (6-7ft). The imposing steel blue spikes with black eyes of the 'Ouverture' variety are highly visited by pollinating insects. The large single flowers, formed by 5 imbricated petals with undulated edges, have a spur reminiscent of a dolphin's snout and are grouped in tight spikes along unbranched stems.

The main flowering begins in June and continues throughout the summer if you cut the faded stems quickly.

Delphiniums are decorative with their cup-shaped, single or double flowers, in long spikes.

Most of them have fibrous or fleshy roots, sometimes tuberous.

Delphiniums are floriferous herbaceous perennial plants belonging to the Ranunculaceae family, always noticeable in a garden. The 'Pacific hybrid' Delphiniums, mainly derived from Delphinium elatum, have a short life and are often grown as biennials. Delphinium elatum or tall larkspur is found in moist meadows at high altitudes in the Eastern Pyrenees and throughout the Alps in Europe, as well as in Southern Europe, Central and Eastern Europe, Siberia, Mongolia, and China.

Their imposing clump always adds volume, height, and charm to perennial borders. They are good companions for moss or gallica roses, with which they create charming and romantic scenes. The intense blue with a touch of pink of the Delphinium Ouverture forms a beautiful combination with pink or salmon daylilies and Rosenschleier gypsophila. Their flowers hold up well in bouquets. Irreplaceable in the background of romantic borders, in containers, or in large pots near the house, these robust plants thrive in sunny, rich, deep, and well-drained soils.

Note: From March to September, the stems of our delphiniums are cut short to promote better branching and achieve optimal rooting. This also prevents the stems from breaking during transport.

The name Delphinium comes from the Greek word "delphis" which means "dolphin". They are also called "larkspur". Native Americans and European settlers used them as a blue dye to make paints or ink. The juice of the flowers mixed with alum produces blue ink. Extracts from delphiniums are used in herbal medicine, especially for eye care. It seems that the oldest use of delphinium flowers was to repel scorpions.

 

Delphinium Ouvertüre - Larkspur in pictures

Delphinium Ouvertüre - Larkspur (Flowering) Flowering

Flowering

Flower colour blue
Flowering time June to July
Inflorescence Spike
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 2 m
Spread at maturity 50 cm
Growth rate fast

Safety measures

Potential risks Plant may be toxic if swallowed

Botanical data

Genus

Delphinium

Species

Pacific-hybrid

Cultivar

Ouvertüre

Family

Ranunculaceae

Other common names

Larkspur, Perennial Larkspur

Origin

Cultivar or hybrid

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Planting and care

Cultivation is fairly easy but still requires some precautions: delphiniums dislike heavy and wet soils, as well as dry and poor soils. The soil that suits them is good black soil, rich in humus, non-compact, moist, even in summer, but not excessively wet in winter, and sheltered from strong winds. Under these conditions, they will live for many years. Also, beware of slugs that can cause damage at the beginning of growth.

Planting period

Recommended planting time February to April, September to November

Intended location

Suitable for Meadow
Type of use Border
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun, Partial shade
Soil pH Neutral
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil

Care

Overwinter Can be left in the ground

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