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Delphinium Crystal Delight - Larkspur

Delphinium Pacific-hybrid Crystal Delight
Larkspur, Perennial Larkspur

4,5/5
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I was eagerly awaiting a variety that is hard to find, looking forward to seeing it flower. The vine-plant is already large and vigorous upon arrival.

Soizick, 17/04/2021

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This plant carries a 12 months recovery warranty

More information

Value-for-money
This perennial delphinium offers something truly new, with very double flowers with petals of crystalline blue that bloom around a tightly packed, very pale green to white centre. They appear in summer, arranged very regularly along particularly elegant, airy spikes. This variety has a slightly more compact habit and strong stems that do not require staking. A hardy delphinium full of nuances and happy even in clayey and heavy soil. Excellent cut flower.
Flower size
4 cm
Height at maturity
1.20 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 July to September
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Description

Delphinium Crystal Delight, also known as Tall Larkspur, is a perennial variety that is part of the 'Highlanders' series recently developed in Scotland. This plant offers something truly new, with very double, crumpled and toothed flowers, with petals of a crystalline blue around a tight, very pale green to white centre. They appear in summer, arranged very regularly along particularly elegant airy spikes. The plant has a slightly more compact habit than classic varieties and produces sturdy stems that do not really require staking. An irresistible delphinium with subtle nuances, but also a very hardy perennial, happy even in clay and heavy soils. Its infinitely delicate flowers are perfect for bouquets.

 

Delphinium Crystal Delight belongs to the Elatum group and the ranunculaceae family. This group brings together most of the large delphiniums, whose tight flowers on tall, usually unbranched, floral stems exceed 6 cm (2in) in diameter. The name of the 'Highlanders' series was inspired by the extraordinarily clear waters of the lakes found in the Scottish region of the 'Highlands'. These varieties bloom from early summer until autumn, provided that the flower stalks are cut as they fade, and make excellent cut flowers. 'Crystal Delight' forms a clump of very finely divided palmate, tender green leaves from which solid floral stems measuring 1.20 m (4ft) in height emerge in summer. The flowering takes place from June to September and is very popular with pollinating insects. The flowers are composed of numerous rows of slightly toothed petals, overlapping each other in perfectly arranged cups on tall erect spikes. The flowers are two-toned, clear lilac-blue, on a pale green bud, washed with very pale yellow and white, which opens into a small collar of the same shade. The plant develops from a woody rhizome that sinks into the ground.

 

The height of Tall Larkspur will structure and balance the volumes in the garden. Planted individually, they will bring height and lightness to flower beds against a dark background of hedges or conifers. They like a sunny exposure sheltered from strong winds in deep and humus-bearing soil, which remains moist even in summer. You can combine 'Crystal Delight' with other delphiniums in pink and blue or with Globemaster alliums to play with the contrast of shapes, and perennial geraniums or baby's breath to create a lighter scene. They are also good companions for moss or gallica roses, with which they create charming and romantic displays. They will integrate just as well into a formal and geometric flower bed as into a country-style setting.

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

Delphinium Crystal Delight - Larkspur in pictures

Delphinium Crystal Delight - Larkspur (Flowering) Flowering
Delphinium Crystal Delight - Larkspur (Foliage) Foliage
Delphinium Crystal Delight - Larkspur (Plant habit) Plant habit

Flowering

Flower colour blue
Flowering time July to September
Inflorescence Spike
Flower size 4 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour light green

Plant habit

Height at maturity 1.20 m
Spread at maturity 50 cm
Growth rate normal

Safety measures

Potential risks Plant may be toxic if swallowed

Botanical data

Genus

Delphinium

Species

Pacific-hybrid

Cultivar

Crystal Delight

Family

Ranunculaceae

Other common names

Larkspur, Perennial Larkspur

Origin

Cultivar or hybrid

Planting and care

Delphiniums are fairly easy to grow but still require some precautions, they generally dislike heavy and wet soils, but also dry and poor soils. The soil that suits them best is deep and fertile, rich in humus, non-compact, moist, even in summer, but without excess in winter, and sheltered from strong winds. 'Crystal Delight' is a bit of an exception to the rule, as its ancestors grew in sometimes marshy soils and endured very cold winters. This plant seems to tolerate clay soils better. Delphiniums planted in ideal conditions will live for many years in the garden. Beware of slugs and snails that can cause damage at the beginning of the growing season.

Full sun will limit the risk of mildew.

When necessary, install tall stakes around the plants, then, as the shoots grow, wrap the stems with a small cord that goes around the stakes.

Planting period

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

Intended location

Suitable for Meadow
Type of use Border, Back of border, Free-standing
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, fertile, moist in summer.

Care

Pruning instructions Pruning the faded spikes allows for a second flowering in early autumn. Cut back in late autumn.
Pruning Pruning recommended once a year
Pruning time September to November
Disease resistance Good
Overwinter Can be left in the ground
4,5/5
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