Cactus Dahlia

Dahlia 'Nuit d’Eté' brings spiky cactus blooms in deep red-purple tones to summer borders and cutting gardens, with bold flowerheads held on sturdy stems. Whether planted in drifts or dotted through mixed beds, the blooms add instant impact and keep coming through the warm months.

Once established, this clump-forming dahlia typically reaches 80–90 cm, producing plenty of long stems for cutting. Regular picking and deadheading encourages a steady succession of flowers from midsummer into autumn.

Start tubers in a frost-free place in spring, or plant outside once the risk of frost has passed. Choose a sunny, sheltered spot in fertile, humus-rich, well-drained soil, and enrich the planting area with compost for best results.

Water during dry spells, especially while buds form, and feed every two to three weeks through the flowering period. Taller plants benefit from discreet staking, and removing faded blooms keeps the plant productive and tidy.

Perfect for borders, patio pots and cutting gardens, dahlias are also pollinator-friendly in single-flowered forms. Lift and store the tubers after the first frosts in colder areas to enjoy an even better display the following year.

Dahlia 'Rip City' brings dramatic deep red-maroon semi-cactus blooms to summer borders and cutting gardens, with bold flowerheads held on sturdy stems. Whether planted in drifts or dotted through mixed beds, the blooms add instant impact and keep coming through the warm months.

Once established, this clump-forming dahlia typically reaches 1.1 m, producing plenty of long stems for cutting. Regular picking and deadheading encourages a steady succession of flowers from midsummer into autumn.

Start tubers in a frost-free place in spring, or plant outside once the risk of frost has passed. Choose a sunny, sheltered spot in fertile, humus-rich, well-drained soil, and enrich the planting area with compost for best results.

Water during dry spells, especially while buds form, and feed every two to three weeks through the flowering period. Taller plants benefit from discreet staking, and removing faded blooms keeps the plant productive and tidy.

Perfect for borders, patio pots and cutting gardens, dahlias are also pollinator-friendly in single-flowered forms. Lift and store the tubers after the first frosts in colder areas to enjoy an even better display the following year.

Dahlia ‘Black Jack’ is a dramatic cactus variety that commands attention with its spiky, dark maroon petals that appear almost black in certain lights. It adds instant depth and mystery to the garden, serving as a perfect counterpoint to brighter, lighter blooms in a mixed herbaceous border.

This variety forms a bushy, upright plant with dark, lush foliage that enhances the moody intensity of the flowers. The pointed, tubular petals radiate outward, giving the blooms a star-like quality that adds texture and architectural interest to planting schemes.

Plant in full sun to help the dark pigments develop fully, ensuring the soil is rich in organic matter and well-drained. Like all dahlias, it appreciates a feeding of high-potash fertiliser once blooming begins to sustain its performance.

Support with stakes as the plant grows, as the stems can become top-heavy with flowers. Remove spent blooms to keep the plant tidy and productive, and lift tubers in autumn to protect them from freezing temperatures.

A brilliant choice for contemporary and gothic-inspired gardens, ‘Black Jack’ looks stunning when planted alongside lime-green foliage or bright orange flowers, creating a bold, high-contrast display.

Dahlia ‘My Love’ is a classic semi-cactus variety that produces elegant, pure white blooms with a hint of lime green at the centre. Known for its vigour and reliability, it is one of the most popular white dahlias for both garden display and cut flower use.

Reaching a tall stature, this variety sends up long, strong stems topped with spiky, needle-like petals that give the flower a starburst effect. Its height makes it an excellent candidate for the back of the border, where it can rise above lower-growing perennials.

Plant in full sun to keep the white petals bright and crisp, in well-drained, fertile soil. Due to its height, it is essential to stake this variety early in the season to prevent wind damage.

Water deeply once a week during dry periods and feed with a liquid tomato fertiliser from July onwards. When the season ends, lift the tubers and store them in dry compost or sand to overwinter safely.

A brilliant choice for "Moon Gardens" or all-white schemes, ‘My Love’ reflects evening light beautifully and serves as a versatile, long-lasting cut flower that complements any arrangement.

Dahlia 'Cactus Mixed' brings a mixed collection of spiky cactus dahlias for bold borders to summer borders and cutting gardens, with bold flowerheads held on sturdy stems. Whether planted in drifts or dotted through mixed beds, the blooms add instant impact and keep coming through the warm months.

Once established, this clump-forming dahlia typically reaches 90–120 cm, producing plenty of long stems for cutting. Regular picking and deadheading encourages a steady succession of flowers from midsummer into autumn.

Start tubers in a frost-free place in spring, or plant outside once the risk of frost has passed. Choose a sunny, sheltered spot in fertile, humus-rich, well-drained soil, and enrich the planting area with compost for best results.

Water during dry spells, especially while buds form, and feed every two to three weeks through the flowering period. Taller plants benefit from discreet staking, and removing faded blooms keeps the plant productive and tidy.

Perfect for borders, patio pots and cutting gardens, dahlias are also pollinator-friendly in single-flowered forms. Lift and store the tubers after the first frosts in colder areas to enjoy an even better display the following year.

Dahlia ‘Playa Blanca’ is a striking white cactus variety that brings texture and brightness to the summer garden. Its name, meaning "White Beach," perfectly describes the clean, fresh look of its spiky, incurved petals that radiate from a tight centre.

The plant is a vigorous grower, producing straight stems that are ideal for cutting. The unique cactus form, with its rolled, quill-like petals, adds a modern, architectural element to floral arrangements and garden beds alike.

Plant in full sun to maintain the snowy whiteness of the blooms, in soil that is rich in organic matter. Good drainage is vital, as dahlia tubers can rot in cold, wet ground.

Support the plant with stakes or netting to keep the stems upright during heavy rains. Deadhead frequently to promote a long flowering window, and lift the tubers in autumn to store them safely away from frost.

A brilliant choice for contemporary garden designs, ‘Playa Blanca’ offers a crisp, sculptural look that contrasts beautifully with soft grasses and broad-leaved foliage plants.

Dahlia 'Hollyhill Cotton Candy' is an eye-catching cactus dahlia with frosted pink petals fading to creamy white, creating a light, feathery effect across large summer blooms.

The more pointed, twisted petals give the flowers extra movement and texture, while tall stems make this a standout choice for cutting and for adding height to sunny borders.

Plant in rich, well-drained soil in full sun after frost has passed, and provide sturdy support early so the stems stay upright as the plant fills out.

Deadhead to encourage continued flowering and lift tubers for safe winter storage in colder areas after the first frost blackens the foliage.