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Giant Larkspur Blauw Boeket Seeds - Annual Delphinium

Delphinium ajacis Blauw Boeket
Giant Larkspur, Rocket Larkspur, Doubtful knight's-spur

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Giant Larskpur 'Blauw Boeket' boasts numerous spikes of single or semi-double flowers in a lovely array of blue shades. The 1.20 m tall plants are well-branched. Annual delphiniums are hardy, easy-to-grow plants that are popular for cutting. The tall flower spikes stand out at the back of summer beds and borders, gorgeous in front of lower-growing perennials. Direct sow in spring in rich, cool soil, in a sunny, sheltered position.
Flower size
3 cm
Height at maturity
1.20 m
Exposure
Sun
Annual / Perennial
Annual
Germination time (days)
21 days
Sowing method
Direct sowing
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Sowing period March to May
J
F
M
A
M
J
J
A
S
O
N
D
Flowering time June to September
J
F
M
A
M
J
J
A
S
O
N
D

Description

Giant Larskpur 'Blauw Boeket' boasts numerous spikes of single or semi-double flowers in a lovely array of blue shades. The 1.20 m tall plants are well-branched. Annual delphiniums are hardy, easy-to-grow plants that are popular for cutting. The tall flower spikes stand out at the back of summer beds and borders, gorgeous in front of lower-growing perennials. Direct sow in spring in rich, cool soil, in a sunny, sheltered position.

Delphinium 'Blauw Boeket' is one of the many hybrids selected from Field Larkspur (D. consolida), a winter-germinating annual that occurs naturally in sandy or chalky cornfields. Annual delphiniums are hardy, fast-growing plants that form a wide 35-40 cm clump. The leaves are palmately divided or lobed, soft green in colour, topped with 120 cm tall floral stems in summer. From June to September, single or semi-double cup-shaped blooms appear, densely gathered on tall, erect spires. The display a wide array of harmonious blue shades including dark blue, sky blue, pale blue and greyish-white, sometimes highlighted with a touch of white. They are a magnet to foraging insects.

The characteristic silhouette of Delphiniums always brings an elegant fullness, verticality and charm to perennial beds. For a romantic touch, combine them with old roses and Baby's Breath. The long-lasting blooms are particularly suitable for cutting. For dried flower arrangements, hang small bouquets upside down in a dry, well-ventilated place, away from direct sunlight.

Flowering

Flower colour blue
Flowering time June to September
Inflorescence Spike
Flower size 3 cm
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Annual
Foliage colour light green

Plant habit

Height at maturity 1.20 m
Spread at maturity 35 cm
Growth rate very fast

Safety measures

Potential risks Plant may be toxic if swallowed

Botanical data

Genus

Delphinium

Species

ajacis

Cultivar

Blauw Boeket

Family

Ranunculaceae

Other common names

Giant Larkspur, Rocket Larkspur, Doubtful knight's-spur

Origin

Cultivar or hybrid

Product reference859021

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Planting and care

Sow the seeds of Delphinium Blauw Boeket directly outside, from April to May, in full sun, on a fertile, light, well-drained soil, previously well-prepared.

Bury the fine seeds at a depth of 6mm in small holes spaced 30cm apart. Keep the soil moist by watering regularly, especially during dry periods. Germination usually takes 14 to 21 days. When the seedlings are large enough to handle, thin them by planting only one plant every 15cm.

For earlier flowering, sow the Delphinium seeds from August to October in 7.5cm pots with quality compost kept moist. Place the pots in a mini-greenhouse or inside a plastic bag at a temperature of 15-20°C until germination. Once the seedlings have developed, place them in a bright, but cooler location. Overwinter the plants in a cool, bright place, protected from frost, by watering them sparingly. Transplant them to their final location in the following spring.

Water regularly until the plants are fully established. Insert sturdy stakes among the tall plants by 10cm, which will allow them to rise while being supported. You can also stake the plants with bamboo canes. Regularly remove faded flowers to encourage the renewal of flowering. Delphiniums appreciate sunny locations, protected from the wind, as well as fertile soil, rich in organic matter and well-drained.

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Sowing period

Sowing period March to May
Sowing method Direct sowing
Germination time (days) 21 days

Intended location

Suitable for Meadow
Type of use Border
Ease of cultivation Amateur
Exposure Sun
Soil pH Neutral, Calcareous
Soil moisture Moist soil, Ordinary soil, deep, well-prepared.

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