Thompson & Morgan

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Perennial & Biennial Plants


In this range you'll find an impressive selection of perennial plants and biennial plants, which are perfect for beginners and experienced gardeners alike. Also known as herbaceous plants, perennial plants live for 2 or more years and flower every year. Biennial plants live for up to 2 years, flowering profusely in their second year before setting seed and dying. Both are great for beds and spring displays and there are many delightful plants to choose from. Use the selections in the left menu to select the right plants for your garden.



We have found 20 products.
 

Eryngium planum 'Blue Hobbit' (Large Plant)

Sea Holly, Blue Eryngo

Eryngium are handy little plants for the border, as they'll grow in many different types of soil, and the flower power of Eryngium 'Little Hobbit' is second to none!

Eryngium 'Little Hobbit' is a unique, dwarf Eryngium, which can be grown in a patio pot. The 30cm (12") plants become top-heavy in midsummer, with sprays of nearly 100 inky-blue flowers. Height and Spread: 30cm (12").

More info
    • 1 x 1 litre potted eryngium plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 1 litre potted eryngium plants

    • Despatch: By end of September 2015
    •  
    • £16.99

Acanthus spinosus (Large Plant)

Bear's Breeches

Acanthus spinosus is robust, architectural plant with exotic-looking foliage and erect spikes of equally exotic blooms. They may look tropical, but Acanthus is fully hardy in the UK, and enjoys sun or shade on a well-drained soil, is very drought tolerant and can tolerate exposed conditions.

Acanthus are also known as Bear's Breech, they make an excellent herbaceous perennial for mixed borders, growing up to 1.2m (3.9') and filling gaps easily. The spiny, purple-tinged flowers appear from late spring to summer. An easy to maintain border plant that comes back year after year. Height: 1.2m (3.9'). Spread: 1m (39").

More info
    • 1 x 1 litre potted acanthus plant

    • Despatch: By end of July 2015
    •  
    • £10.99
    • 2 x 1 litre potted acanthus plants

    • Despatch: By end of July 2015
    •  
    • £19.99

Dierama Collection

Angel's Fishing Rod

Clusters of delicate bell shaped flowers dangle from impossibly slender stems that arch and tremble in the breeze. From July, the elegant blooms rise above clumps of slender, semi-evergreen, grass like foliage before giving way to attractive seedheads in late summer. Dierama is a truly graceful hardy perennial and makes a most beautiful addition to cottage garden borders, adding movement and fluidity to planting schemes. Often referred to as Angel's Fishing Rod, it looks particularly attractive when overhanging water. Height: 100cm (39"). Spread: 45cm (18").

  • Collection comprises:
  • Dierama argyruem - Dazzling white bell shaped flowers that dangle from arching stems.
  • Dierama 'Blackberry Bells' - Deep purple pink blooms on wiry stems.
  • Dierama erectum - Stiffer stems filled with outward facing blooms, rather than pendulous flowers.
More info
    • 3 x 9cm potted dierama plants

    • Despatch: By end of July 2015
    •  
    • £16.99
    • 6 x 9cm potted dierama plants

    • Despatch: By end of July 2015
    •  
    • £29.99

Poppy 'Royal Wedding' (Large Plant)

Papaver orientale, Oriental Poppy

The Oriental Poppy is perfect for cottage gardens, and are best planted together in clumps for the full effect. Poppy 'Royal Wedding' is the pick of the bunch, with glistening white petals and a dark centre to each bloom. Bees and butterflies love the nectar-rich flowers. Oriental Poppies are easy to grow, hardy perennial plants for a sunny border in the garden. Plants are clump-forming, tough and produce over-sized flowers in early summer each year, followed by attractive seedheads. Height: 60cm (24"). Spread: 50cm (20"). More info
    • 1 x 8cm potted poppy plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 8cm potted poppy plants

    • Despatch: By end of September 2015
    •  
    • £16.99

Eryngium 'Neptune's Gold'

Sea Holly

  • New in 2015
The plant everyone's talking about! Eryingium 'Neptune's Gold' is the kind of breeding breakthrough that doesn't come along every day; a true colour break - the world's first golden Sea Holly! Selected in Wales from a batch of seedlings, this unique specimen still retains the iconic blue flower tones of Eryngium, but also takes on a stunning golden sheen - just like Neptune's crown! This superb perennial was Voted Best New Product at the recent Grower of the Year awards 2015. Height: 50cm (20"). Spread: 40cm (16").
More info
    • 1 x 9cm potted eryngium plant

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 2 x 9cm potted eryngium plants

    • Despatch: By end of August 2015
    •  
    • £19.99

Delphinium 'Black Knight' (Large Plant)

Pacific Hybrid

An absolute cottage garden classic. Plant Delphiniums in bold clumps for back-of-the-border impact. Delphinium 'Black Knight' is an extra special variety with some of the deepest indigo-blue flowers, each with a black eye.

The sight of Delphiniums in a garden is simply divine. They flower from early summer, and will often flower twice. The plants are architectural and handsome, you certainly won't regret planting these handsome perennials! Height: 1.7m (5.5'). Spread: 75cm (29").

More info
    • 1 x 1 litre potted delphinium plant

    • Despatch: By end of July 2015
    •  
    • £9.99
    • 2 x 1 litre potted delphinium plants

    • Despatch: By end of July 2015
    •  
    • £16.99

Agapanthus 'Collection'

African Blue Lily

This magnificent Agapanthus collection will grace your summer garden with elegance and stature. Including blue, white and violet-blue, these spectacular Agapanthus flowers are balanced on tall stiff stems, making superb cut flowers, or alternatively forming attractive autumn seed heads if left intact. With large strap-shaped leaves and distinctive flower heads, these impressive hardy perennials are ideal for adding architectural presence to borders and containers.


  • Collection comprises 1 plant each of:
  • Agapanthus 'Snow Cloud' – Aptly named, this tall, evergreen Agapanthus produces massive umbels which are densely packed with snow-white flowers. Height: 1m (3'). Spread: 45cm (18").
  • Agapanthus 'Northern Star' – Tall Agapanthus producing large umbels of violet-blue flowers with dark purple central stripes. Height: 90cm (35"). Spread: 45cm (18").
  • Agapanthus 'Silver Moon' – Dwarf Agapanthus producing pale blue flowers above clumps of striking, pale green and white variegated leaves. Height: 60cm (24"). Spread: 45cm (18").
More info
    • 3 x 9cm potted agapanthus plants - 1 of each variety

    • Despatch: By end of July 2015
    •  
    • £19.99

Crocosmia 'Lucifer' (Large Plant)

Montbretia

Tall arching stems drip with fiery red trumpets above crimped, sword-like foliage. Crocosmia 'Lucifer' is well loved for its late summer display that erupts in a blaze of colour as other border perennials begin to fade. This RHS AGM variety is renowned for its vigour and resilience, adding structure and height to sunny herbaceous borders. The tall stems make eye-catching cut flowers too.Height: 100cm (39"). Spread: 10cm (4"). More info
    • 1 x 1 litre potted crocosmia plant

    • Despatch: By end of July 2015
    •  
    • £9.99
    • 1 x 2 litre potted crocosmia plant

    • Despatch: By end of July 2015
    •  
    • £9.99
    • 2 x 1 litre potted crocosmia plants

    • Despatch: By end of July 2015
    •  
    • £16.99
    • 2 x 2 litre potted crocosmia plants

    • Despatch: By end of July 2015
    •  
    • £16.99

Allium 'Gladiator' (Large Plant)

Ornamental Onion

Hundreds of starry purple blooms with delicate silvery tips form these incredible allium flower heads. The magnificent, spherical blooms of Allium 'Gladiator' are up to 15cm (6") across! Flowering only once in a season, the blooms are followed by skeletal seedheads for a spectacular autumn display. Undemanding and easy to grow, these purple alliums are guaranteed to add the 'wow' factor to borders and cut flower arrangements. Height: 120cm (48"). Spread: 15cm (6"). More info
    • 1 x 2 litre potted allium plant

    • Despatch: By end of March 2016
    •  
    • £9.99
    • 2 x 2 litre potted allium plants

    • Despatch: By end of March 2016
    •  
    • £16.99

Eupatorium dubium 'Baby Joe' (Large Plant)

Hemp Agrimony

Butterflies absolutely love Eupatorium; and this compact variety is excellent for smaller gardens or patio pots. The 75cm (30") plants create a dome of rich purple blooms from summer to autumn.

Eupatorium is a resilient plant, which will grow in most sites and soils, especially on wet soil. The dried seed heads give winter interest too. Height and Spread: 75cm (30").

More info
    • 1 x 1 litre potted eupatorium plant

    • Despatch: By end of July 2015
    •  
    • £9.99
    • 2 x 1 litre potted eupatorium plants

    • Despatch: By end of July 2015
    •  
    • £16.99

Sedum 'Autumn Delight' (Large Plant)

Stonecrop

This showy cultivar has bright yellow-green foliage with attractive serrated blue margins, making it well worth growing for its leaves alone. In late summer Sedum 'Autumn Delight' lives up to its name, producing wide panicles of creamy white buds that open to reveal pale pink flowers. Like all Sedums, the blooms are loved by bees and butterflies making them a useful hardy perennial for wildlife gardens. Faded flower heads turn to bronze adding further interest well into autumn. A drought resistant and easy to grow perennial for a sunny border. Height and spread: 60cm (24"). More info
    • 1 x 1 litre potted sedum plant

    • Despatch: By end of July 2015
    •  
    • £7.99
    • 2 x 1 litre potted sedum plants

    • Despatch: By end of July 2015
    •  
    • £12.99

Cyclamen hederifolium (Large Plant)

Cyclamen neapolitanium, Ivy-leaved Cyclamen, Sowbread

A delightful little plant producing delicate pink flowers with reflexed petals in the autumn. Often emerging after the flowers, the heart-shaped deep green leaves are patterned with silver, creating a striking marbled effect. Cyclamen hederifolium is a superb ground-cover plant in rock gardens and woodland gardens where it will self-seed freely to create carpets of foliage and flowers from autumn to spring, before the foliage dies back in summer. Height: 10cm (4"). Spread: 15cm (6"). More info
    • 1 x 1 litre potted cyclamen plant

    • Despatch: By end of July 2015
    •  
    • £9.99
    • 2 x 1 litre potted cyclamen plants

    • Despatch: By end of July 2015
    •  
    • £16.99