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.


For beautiful summer flowers browse our range of annual plants.



We have found 13 products.
 

Alstroemeria 'Everest Blue Diamond'

Peruvian Lily

 Customer Rating
  • T&M Exclusive

A fabulous, Peruvian Lily producing mauve blue flowers on tall, upright stems. Alstroemeria 'Everest Blue Diamond' makes an eyecatching feature in borders or containers throughout the summer. Support this hardy perennial with our handy climbing frame for the most impressive display. With so many long-stemmed blooms, you will never be short of cut flowers to add to magnificent bouquets. Height: 140cm (71"). Spread: 75cm (30").

More info
    • 3 jumbo plug plants

    • Despatch: By end of April 2016
    •  
    • £24.99

Iris sibirica Collection

The breeding behind our unique iris collection brings more grace and beauty to this cottage garden favourite than ever before. Four exclusive varieties, all enhanced with crested double iris flowers for extra elegance and a frenzy of summer colour in your borders. Each flower has in excess of 20 petals, bringing a rose-like appearance to the luxuriant blooms. Iris sibirica Collection are tough performers, equally at home in moist, boggy soils and dry areas, and will enhance any garden border, especially mixed with other flower hardy perennials. Lush grass-like foliage makes for a good seasonal border filler. Height: 90cm (36"). Spread 35cm (14").


  • Collection comprises:
  • Iris 'Imperial Opal' - Translucent lavender-pink blooms with light edging and white throat.
  • Iris 'Pink Parfait' - Soft lavender-pink blooms with lighter edging. A yellow centre with white halo can be seen as flowers open fully.
  • Iris 'Concord Crush' - Rich violet-blue blooms with gold and white central blaze.
More info
    • 3 bare root iris plants - 1 of each variety

    • Despatch:
    •  
    • £12.99
    • Out of stock

Delphinium 'Pink Blushes'

This Pink Blush is anything but embarrassing! Glorious, tall spikes of evenly spaced, perfectly formed florets in shades of pink, from pastel to magenta! The result of many years of breeding from Terry Dowdeswell, our world-class Delphinium expert in New Zealand, Delphinium 'Pink Blushes' are strong plants with disease resistance and unrivalled garden performance. Height: 1.5m (5'). Spread: 75cm (30").
More info
    • 5 delphinium Postiplug plants

    • Despatch: By end of April 2016
    •  
    • £9.99
    • 10 delphinium Postiplug plants

    • Despatch: By end of April 2016
    •  
    • £14.99

Iris 'Cantina' (Re-Blooming)

Bearded Iris

The bold, violet blooms of Iris 'Cantina' are a magnificent sight in summer borders. With the first flowers appearing in late spring and continuing into summer, these really are outstanding hardy perennials. These majestic bearded iris flowers have a delicate scent and make impressive cut flowers for a vase indoors. Height: 90cm (36"). Spread: 40cm (16"). More info
    • 1 Iris rhizome

    • Despatch: By end of February 2016
    •  
    • £7.99

Hellebore 'Single Pink Spotted' (Large Plant)

Helleborus

Hellebores are essential for winter colour in the garden, and are just as important in the garden as snowdrops, aconites and early spring bulbs. The Christmas Rose blooms extremely early in the year, sometimes even from Christmas, hence the name. Hellebores are most at home in shady borders, or for planting beneath trees and shrubs.

Hellebores have clear-coloured, long-lasting, cup-shaped flowers. Hellebore ‘Single Pink Spotted’ offers blooms with distinctive spots on each petal. The evergreen Hellebore is excellent for winter colour in the garden; plants are clump-forming are brilliant for ground cover. Height and spread: 45cm (18").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3 litre potted hellebore plant

    • Despatch: By end of February 2016
    •  
    • £11.99
    • 2 x 3 litre potted hellebore plants

    • Despatch: By end of February 2016
    •  
    • £19.99

Wallflower 'Bowles's Mauve' (Large Plant)

Erysimum, Cheiranthus

Flowering from February right through to midsummer, this hardy perennial well deserves its RHS AGM. Although relatively short lived, Wallflower ‘Bowles Mauve’ makes up for it in sheer flower power, producing masses of mauve flowers above clumps of grey-green, evergreen foliage. Versatile and undemanding, this tough little Eryisimum copes in even the poorest of soils. Perfect for filling beds and containers with long lasting colour. Height: 75cm (30"). Spread: 60cm (24").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 1.5 litre potted wallflower plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 1.5 litre potted wallflower plants

    • Despatch:
    •  
    • £16.99
    • Out of stock

Iris 'Concord Crush'

Iris sibirica, Iris sibirica

Iris 'Concord Crush' sports heavily petalled, elegant violet-blue flowers with a deeply ruffled form. Iris sibirica are tough performers, equally at home in moist, boggy soils and dry areas, and will enhance any garden border, especially mixed with other flower hardy perennials. Lush grass-like foliage makes for a good seasonal border filler. Height: 90cm (36"). Spread 35cm (14"). More info
    • 1 bare root iris plant

    • Despatch:
    •  
    • £6.99
    • Out of stock

Veronica longifolia 'Candied Candle' (Large Plant)

Speedwell

Veronica ‘Candied Candle’ bears detailed flower spikes in candy pink. Plants are strong, weatherproof and untroubled by pest and disease. This late-flowering perennial will establish easily into any border, and flower it’s heart out from late summer, attracting hosts of butterflies and beneficial insects. Veronica plants are very low-maintenance, super hardy and flower for a long period. Height: 50cm (20"). Spread: 30cm (12").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 1 litre potted Veronica plant

    • Despatch: By end of May 2016
    •  
    • £9.99
    • 1 x 2 litre potted veronica plant

    • Despatch: By end of May 2016
    •  
    • £12.99
    • 2 x 1 litre potted Veronica plants

    • Despatch: By end of May 2016
    •  
    • £16.99
    • 2 x 2 litre potted veronica plants

    • Despatch: By end of May 2016
    •  
    • £19.99

Hellebore 'Pink Spotted'

  • The very best hellebores that money can buy

Exquisite cup shaped, pink flecked blooms appear like jewels in dull winter borders. Hellebore 'Pink Spotted' is the essential low maintenance plant for any difficult, shady border where they will form clumps of leathery evergreen foliage for a year round garden presence. These resilient hardy perennials are vigorous and long lived, lasting for 20 years or more. Height and spread: 45cm (18").



Thompson & Morgan inherited the highly-commended hellebore breeding programme of Elizabeth Strangman when she retired and we are immensely proud to carry on her legacy, perfecting the amazing colours and forms of this wonderful perennial.
More info
    • 1 x 9cm potted hellebore plant

    • Despatch: By end of February 2016
    •  
    • £13.99

Mazus reptans

  • Try a new ground cover idea
This low growing, matt-forming perennial is perfect for filling gaps between stepping stones or at the front of sheltered borders and rockeries. The spreading foliage of Mazus reptans forms a dense carpet that is covered in pretty lilac-blue flowers with a yellow-spotted lower lip. This hardy, ground cover alpine has a long flowering period from late spring to July. Height: 5cm (2"). Spread: 30cm (12").
More info
    • 5 mazus jumbo plug plants

    • Despatch: By end of March 2016
    •  
    • £14.99
    • 10 mazus jumbo plug plants

    • Despatch: By end of March 2016
    • SAVE £9.99  
    • £29.98 £19.99

Penstemon 'Dark Towers'

Dark bronze semi-evergreen foliage makes the perfect backdrop for the tubular, bright pink flowers of Penstemon 'Dark Towers'. Blooming from midsummer until the first frosts, the long lasting flowers are irresistible to pollinating insects, adding colour to borders long after other summer flowering perennials have faded. This resilient, carefree hardy perennial is undemanding and easy to grow, tolerating almost any position in the garden, regardless of rain or drought, and even resisting slug damage! Height: 75cm (30"). Spread: 40cm (16"). More info
    • 3 penstemon jumbo plug plants

    • Despatch:
    •  
    • £12.99
    • Out of stock
    • 6 penstemon jumbo plug plants

    • Despatch:
    • SAVE £8.99  
    • £25.98 £16.99
    • Out of stock

Foxglove 'Camelot Lavender' (Large Plant)

Digitalis purpurea

Foxgloves are the perfect cottage garden plant; and new strain Foxglove ‘Camelot Lavender’ has the traditional appearance of usual wild Foxgloves, but with blooms all around the stem, giving even more impact.

‘Camelot’ Foxgloves are superior, F1 hybrid quality, and plants will flower in the same year that they are planted. Digitalis are ideal for cottage garden borders, are easy to grow and will last for many years. Height: 120cm (48"). Spread: 45cm (18").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3 litre potted foxglove plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 3 litre potted foxglove plants

    • Despatch:
    •  
    • £16.99
    • Out of stock