The Plant Collection

A statuesque beauty for the back of the border, Cephalaria gigantea is an architectural perennial that brings height, lightness, and movement to the garden. Towering stems reach up to 2.5m tall, topped with soft lemon-yellow, pincushion-like flowers that dance in the breeze from early to mid-summer. The airy, see-through habit allows it to rise above other plants without casting heavy shade, making it an ideal choice for layered planting schemes. Loved by bees and other pollinators, it creates a delightful, wildlife-friendly focal point.

• Height: 200–250cm
• Spread: 75–90cm

Verbascum blattaria 'Albiflorum' is a graceful, airy biennial or short-lived perennial with delicate white flowers and contrasting deep purple stamens, carried on slender, branching stems. Blooming over a long summer period, this elegant mullein self-seeds modestly, creating a naturalistic effect without becoming invasive. Its light, open structure adds movement and charm to borders and wildflower-style plantings.

• Height: 90–120cm
• Spread: 30–40cm

For more details and photo visit: https://www.rhs.org.uk/plants/75956/verbascum-blattaria-f-albiflorum/details

Salvia 'African Sky' is a graceful perennial known for its delicate spikes of soft blue flowers with a hint of mauve, blooming from midsummer to autumn. These elegant flowers sit above aromatic, green foliage, creating a light and airy presence in garden borders and containers. Loved by bees and butterflies, this salvia is a perfect addition to wildlife-friendly gardens. Its compact, bushy habit makes it an excellent choice for smaller spaces or to complement other flowering perennials.

• Height: 60–80 cm
• Spread: 40–60 cm

Photo courtsey of Alpha Plants

Leucojum aestivum ‘Gravetye Giant’, also known as the summer snowflake, is a graceful, bulbous perennial that brings a touch of elegance to spring gardens. Taller and more robust than the species, this cultivar bears nodding, bell-shaped white flowers, each petal tipped with a fresh green dot. Blooming in mid to late spring, it resembles a taller snowdrop and thrives in damper conditions where many other bulbs struggle. Named after Gravetye Manor, the home of famed gardener William Robinson.

• Height: 40–60cm
• Spread: 20–30cm

Brunnera macrophylla is a much-loved shade-loving perennial, grown for its heart-shaped, rough-textured foliage and sprays of delicate, sky-blue flowers that resemble forget-me-nots. Flowering in mid to late spring, it brings light and freshness to woodland gardens, shady borders, and containers. After flowering, its lush foliage remains attractive throughout the growing season, providing texture and contrast among other perennials.

• Height: 30–45cm
• Spread: 45–60cm

Aquilegia ‘Black Barlow’ is a striking, double-flowered variety of columbine with rich, velvety blooms in deep purple-black – almost black – held on slender, upright stems above soft, ferny foliage. The intricate, spurless flowers appear from late spring into early summer, bringing a dramatic, elegant note to borders, containers, and shady corners. Part of the Barlow series bred for their distinctive pompom-style flowers and excellent garden performance.

• Height: 60–75cm
• Spread: 30–40cm

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Digitalis purpurea ‘Dalmatian Peach’ is a refined twist on the classic foxglove, offering elegant spires of soft peach-apricot flowers with delicate, freckled throats. Blooming in early summer, this compact, fast-growing variety forms neat rosettes of foliage and produces flower spikes that are shorter and more uniform than traditional types – making it ideal for smaller gardens, borders, and containers. Its soft colouring pairs beautifully with pastels and silvers, adding a gentle, romantic note to planting schemes.

• Height: 60–90cm
• Spread: 30–40cm

Agastache ‘Red Fortune’ is a bold and vibrant perennial, producing striking spikes of deep rose-pink to reddish-magenta flowers from midsummer through to early autumn. Its aromatic, dark green foliage releases a minty-anise scent when brushed, making it a sensory delight as well as a visual one. This upright grower is a magnet for bees, butterflies, and other pollinators, and adds a punch of colour and height to mixed plantings.

• Height: 80–90cm
• Spread: 40–50cm

A graceful and airy perennial, Gaura 'Flamingo Pink' is loved for its long-lasting display of delicate, butterfly-like flowers in soft blush-pink tones. Held on slender, wiry stems above finely textured foliage, the blooms flutter and dance in the breeze, bringing movement and elegance to borders and containers alike. Flowering from late spring right through to autumn, this is a superb choice for adding a light, romantic touch to any planting scheme. Its relaxed form and generous flowering habit make it a go-to plant for softening edges and filling gaps with effortless charm.

• Height: 60–80cm
• Spread: 40–60cm

A stunning visual delight! Bright pink flowers with striking magenta calyces are displayed on sturdy, upright stems that support dense clusters of blooms. With continuous flowering and a strong appeal to pollinators, this plant thrives in the summer heat.

This variety attracts bees and butterflies, making it a great choice for pollinator-friendly gardens. With its upright growth habit, it reaches a height of 18-24 inches and a spread of 12-18 inches. 'Pink Nebula' pairs beautifully with other perennials, grasses, and shrubs in borders or containers.

• Height: 18-24 inches
• Spread: 12-18 inches