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Delphinium Blue Jay - Larkspur

Delphinium Pacific-hybrid Blue Jay
Larkspur, Perennial Larkspur

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This larkspur is a large perennial variety with magnificent inflorescences covered with flowers of a very pure sky blue, whose heart is adorned with a dark black collar in summer. Magnificent and spectacular at the back of a bed, it requires staking. These plants thrive in the sun in rich, deep, and permeable soils.
Flower size
5 cm
Height at maturity
1.70 m
Spread at maturity
50 cm
Exposure
Sun
Hardiness
Hardy down to -29°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to April, September to November
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Flowering time June to July, September
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Description

Delphinium 'Blue Jay' is a tall perennial variety, with magnificent inflorescences covered with very pure celestial blue flowers, with a dark black collar at the heart. Majestic and spectacular as a background in flower beds, in planters, in pots near the house, or in bouquets, these delphiniums thrive in the sun in rich, deep, permeable soils and will require staking.

 

 

Delphinium 'Blue Jay' is one of the many hybrids obtained from D. elatum. It is a large herbaceous perennial plant with a short lifespan but rapid growth. It forms a clump of finely dissected palmate, tender green leaves from which flower spikes reaching 1 m (3ft) in height on numerous stems ranging from 1.5 to 1.80 m (5 to 6ft) tall emerge in summer. The main flowering is in June, repeating in September if the stems are cut back as they fade, loved by pollinating insects. The flowers are single, cup-shaped, arranged on tall, sturdy spikes with medium, pure, and deep sky-blue petals, surrounding a large black collar, called a "bee". The plant develops from a woody rootstock that sinks into the soil.

 

The characteristic silhouette of Delphiniums always adds volume, height, and style to perennial flower beds. They make great companions for moss or gallica roses, creating charming and romantic displays. You can also create a beautiful combination with soft orange daylilies and gypsophila 'Rosenschleier'. This variety is well suited for flowering pots. It should be carefully staked, or supported by tall perennials or flowering bushes. Its flowers hold up well and are particularly appreciated in bouquets.

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

Delphinium Blue Jay - Larkspur in pictures

Delphinium Blue Jay - Larkspur (Flowering) Flowering
Delphinium Blue Jay - Larkspur (Foliage) Foliage
Delphinium Blue Jay - Larkspur (Plant habit) Plant habit

Flowering

Flower colour blue
Flowering time June to July, September
Inflorescence Spike
Flower size 5 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 1.70 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

Blue Jay

Family

Ranunculaceae

Other common names

Larkspur, Perennial Larkspur

Origin

Cultivar or hybrid

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Planting and care

Delphinium 'Blue Jay' is not difficult to grow but still requires some precautions: delphiniums dislike heavy and damp soils, as well as dry and poor soils. The soil that suits them is fertile 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. Plant them in spring after the last frost leaving a minimum of two or three shoots on young plants and five to seven on well-established delphiniums. During growth, water once or twice a week and apply liquid fertilizer every two or three weeks. Remove faded flowers by cutting the spikes at the level of the small lateral flowering shoots. Cut back the entire plant to ground level in autumn. Avoid letting it go to seed to keep the plant longer, unless you want to sow your own seeds. Don't be disappointed if the resulting delphiniums don't have the same appearance as the parent plant, as delphiniums hybridize very easily. Tip: Dare to go tall with these giant plants that structure and balance the garden. The tallest ones will give volume and lightness against a dark background of hedges or conifers. Intermediate-sized ones will dress up flowerbeds, such as those with giant dahlias. Look after the vegetation with regular watering. Watch out for slugs.

Planting period

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

Intended location

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

Care

Pruning instructions Remove the faded flowers by cutting the spikes at the level of the small side shoots with flowers. Cut back the entire plant to ground level in autumn.
Pruning Pruning recommended once a year
Pruning time June to July, October
Disease resistance Good
Overwinter Can be left in the ground

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