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Delphinium Galahad seeds - Larkspur

Delphinium x elatum Galahad
Larkspur, Perennial Larkspur

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This plant carries a 6 months recovery warranty

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A giant larkspur with pure white flower spikes, towering over borders at over 1.50m in height. This perennial forms a dense clump of deep green foliage, from which long stems laden with large semi-double to double flowers emerge in early summer. Sow in pots or trays before transplanting, allowing for sturdy supports and protection against slugs. This variety makes spectacular flower arrangements.
Flower size
60 cm
Height at maturity
1.65 m
Exposure
Sun
Germination time (days)
21 days
Sowing method
Sowing under cover, Sowing under cover with heat
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Sowing period February to June
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Flowering time June to July, September
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Description

Delphinium Pacific Giants 'Galahad' is a tall perennial larkspur for lovers of opulent borders and cut flowers. Its majestic spikes of pure white form veritable candles above a well-furnished clump of leaves. From the famous Pacific Giants series, it offers dense, regular flower stems, highly prized for flower arrangements. Sown in fertile, moist soil, in full sun, it quickly rewards the gardener with generous flowering, often followed by a repeat bloom in late summer.

Delphinium 'Galahad' belongs to the Ranunculaceae family and behaves as a short-lived herbaceous perennial. The plant forms a compact clump from a system of thick roots, sensitive to excess water and waterlogged soils. The deciduous rosette of foliage appears in spring. It consists of large, medium green, palmately lobed leaves, deeply cut into triangular lobes. From the crown, erect, hollow but robust stems rise, reaching 1.50 to 1.80m in height, which are best staked as soon as growth begins.
The inflorescences are long, dense spikes, carried well above the foliage. The numerous semi-double to double flowers measure 5 to 7cm in diameter. The petals pile up into full corollas, of a very luminous white, enhanced by a small central "eye" slightly greenish or cream, sometimes darker depending on the seed lines. Flowering occurs from June to July, with a possible repeat bloom in late summer, if the stems are cut back just after the first wave of flowers. Pollination is by insects, notably bees and bumblebees, attracted by the nectar contained in the floral spur.
The whole plant is toxic if ingested; it is best handled with gloves, especially during pruning and staking.

A bit of history: the Pacific Giants series is one of the most famous delphinium lines of the 20th century: developed in California by Frank Reinelt, then distributed and improved by the Benary seed house, it popularised these tall larkspurs named after characters from the Round Table – 'Galahad', 'King Arthur', 'Guinevere', 'Percival'… 'Galahad' has also received the Award of Garden Merit from the Royal Horticultural Society, a guarantee of real ornamental value and good reliability in cultivation.

In the garden, place Delphinium Pacific Giants 'Galahad' at the back of the border. It can be planted in groups of three or five to form a column of light behind lower perennials. It is an ideal companion for English roses in cream or pale pink tones such as 'Desdemona'. In a cottage garden, combine it with Foxglove 'Dalmatian Purple', the carmine red spikes of Lupin 'Mon Château' ('My Castle') and the mauve clouds of Phlox paniculata 'Blue Paradise'. Together, they create very floriferous borders from early summer until the end of the season and provide an abundance of blooms for flower arrangements.

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Delphiniums, larkspur : planting, sowing and care
Family sheet
by Virginie T. 17 min.
Delphiniums, larkspur : planting, sowing and care
Read article

Flowering

Flower colour white
Flowering time June to July, September
Inflorescence Spike
Flower size 60 cm
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Plant habit

Height at maturity 1.65 m
Spread at maturity 50 cm
Growth rate fast

Safety measures

Potential risks Plant may be toxic if swallowed

Botanical data

Genus

Delphinium

Species

x elatum

Cultivar

Galahad

Family

Ranunculaceae

Other common names

Larkspur, Perennial Larkspur

Origin

Cultivar or hybrid

Product reference • 25365

Planting and care

Sow Delphinium Pacific Giants Galahad seeds from February to June in good quality, well-drained soil, and cover the seeds lightly with compost or vermiculite. Place the seed tray in a propagator at a temperature of 10-13°C, or seal a clear polythene bag and place it in a dark spot until germination, which takes 1 to 3 months. Keep the compost moist but not wet.

When the seedlings are large enough to handle, prick them out into 8cm pots and move the Delphinium young plants to cooler conditions. Once all risk of frost has passed, gradually acclimatise the young plants to outdoor conditions for 7 to 10 days before planting outside in the open ground. Plant the Delphiniums at a distance of 45cm in moist, fertile, well-worked, and well-drained soil. Delphiniums dislike stagnant moisture. Choose a sunny position, sheltered from strong winds. Protect young delphiniums from attacks by slugs and snails.

Sowing period

Sowing period February to June
Sowing method Sowing under cover, Sowing under cover with heat
Germination time (days) 21 days

Intended location

Suitable for Meadow
Type of use Border, Back of border, Cut flowers, Container
Hardiness Hardy down to -20.5°C (USDA zone 6b) Show map
Ease of cultivation Amateur
Exposure Sun
Soil pH Acidic, Neutral
Soil moisture Moist soil, Deeply worked, rich soil

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