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Delphinium Guinevere Group - Larkspur

Delphinium Pacific-hybrid Guinevere
Larkspur, Perennial Larkspur

4,3/5
11 reviews
2 reviews
1 reviews
1 reviews
1 reviews

Young plant received in a sorry state, I hope for recovery but it seems unlikely. In general, I would say that half of my order was very damaged, with few stems and many broken ones. I was used to better quality and greater care taken with orders.

CLaire, 23/05/2023

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This plant carries a 12 months recovery warranty

More information

This large perennial delphinium has magnificent inflorescences measuring up to 1 metre (3 feet) in summer, bearing semi-double flowers, in a very romantic lavender-pink to mauve, rarely encountered in these hybrids. Their heart is adorned with a small white 'Bee'. Magnificent and spectacular in the back of a border, it will require staking. These plants thrive in the sun in rich, deep, and well-drained soils.
Flower size
10 cm
Height at maturity
1.80 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 March to May, September to November
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Flowering time June to July, September
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Description

Delphinium 'Guinevere Group' is an immense perennial with a very upright habit, and magnificent inflorescences that sometimes reach 1 metre (3 feet) towards the sky. They are adorned with well-distributed semi-double flower spikes, a rare, romantic lilac-pink to purple, illuminated by a small white bee in the heart of each corolla. Flowering is in June, and then again in September if the stems are cut back as they fade.

 

The 'Guinevere Group' Delphinium is one of the many hybrids obtained by crossing D. elatum, which gave birth, among others, to the famous "Pacific Giant" series. It is a large herbaceous perennial plant with a short lifespan but rapid growth. It forms a clump of palmate, very finely cut, tender green leaves, from which floral spikes 1 m (3ft) to 1.20 m (4ft) tall, carried by numerous stems exceeding 1.80 m (6ft) in height emerge in summer and must be staked. The wide flowers are semi-double, cup-shaped, gathered on tall erect spikes and loved by pollinating insects. They have lavender-pink, pale mauve or faded pink petals, around a tiny white collar, called a 'bee'. The plant develops from a woody rootstock that penetrates vertically into the soil.

 

The characteristic silhouette of Delphinium always adds breadth, height, and charm to perennial beds. They are good companions for moss or Gallic roses, creating charming and romantic scenes. You can also create a beautiful combination with pink daylilies, mauve or blue paniculate phlox, and baby's breath Rosenschleier. This variety 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 of the crown and achieve optimal rooting. This also prevents the stems from breaking during transportation.

Delphinium Guinevere Group - Larkspur in pictures

Delphinium Guinevere Group - Larkspur (Flowering) Flowering
Delphinium Guinevere Group - Larkspur (Foliage) Foliage

Flowering

Flower colour pink
Flowering time June to July, September
Inflorescence Cluster
Flower size 10 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 1.80 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

Guinevere

Family

Ranunculaceae

Other common names

Larkspur, Perennial Larkspur

Origin

Cultivar or hybrid

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Planting and care

Plant them in spring after the last frosts, in a sunny position, in moist, rich, and well-drained soil. Leave 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.

Tip: Dare to go tall with these giant plants that structure and balance the garden. The tallest ones will add volume and lightness against a dark background of hedges or conifers. The intermediate-sized ones will dress up tall flower beds, such as those of giant dahlias. Look after the vegetation with regular watering. Keep an eye out for slugs and snails, especially at the start of the growing season.

Planting period

Best planting time March, October
Recommended planting time March to May, 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, rich, light and deep

Care

Pruning instructions Support the stems in spring. Remove faded inflorescences quickly to encourage a second autumn flowering.
Pruning Pruning recommended once a year
Pruning time June to August
Disease resistance Average
Overwinter Can be left in the ground
4,3/5

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