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 91 products.
 

Rose Lily Grass

Rhodohypoxis

Dainty, jasmine-like flowers in two shades of pink erupt in profusion above short clumps of lance-shaped foliage in late spring, followed by flushes of flowers throughout the summer. Giving a long-lasting display throughout the summer months, these starry gems also have a delicate sweet fragrance. Each Rose Lily Grass plug plant contains more than one bulblet for prolific flowering in borders, rock gardens and containers. Although fully hardy, Rhodohypoxis will need protection from winter wet. Height and spread: 15cm (6"). More info
    • 1 Rose Lily Grass jumbo plug plant

    • Despatch: By end of July 2015
    •  
    • £14.99
    • 3 Rose Lily Grass jumbo plug plants

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

Blechnum brasiliense 'Volcano'

Dwarf Brazilian Tree Fern, Hard Fern

  • New in 2015
Are Dicksonia tree ferns too large or expensive for you? We've found the answer - try the dwarf Brazilian tree fern instead! Blechnum brasiliensis 'Volcano' is an exciting new find for the home gardener, only recently introduced to the UK, but sure to be the next big thing! Compact plants lend themselves well to growing in patio pots; and throw up huge fronds up to 70cm (28") tall. The young fronds unfurl in a bronze volcanic hue turning a shiny green as they open. A relative of our native Deer Fern, this tender exotic fern thrives in low light, so it's perfect for giving a tropical touch to your home and garden. With tropical origins, Blechnum brasiliense is hardy enough to be grown in most UK gardens but will appreciate a sheltered spot and some winter protection. Height: 90cm (36"). Spread: 70cm (28").
More info
    • 1 x 9cm potted blechnum plant

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

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

Agapanthus 'Twister'

African Blue Lily

  • New in 2015
Here's a plant that will stand out from the crowd in your garden - the first ever deciduous bicolour Agapanthus. This African lily is robust, and truly hardy in the UK meaning it's perfect in the garden border as well as in a patio container. The flowers of Agapanthus 'Twister' are absolutely glorious, with crystal white flutes turning inky blue at the tips. The huge globes of colour appear from mid to late summer, hosted on strong, sturdy stems that need no staking. Height: 60cm (24"). Spread: 50cm (20").
More info
    • 1 x 9cm potted agapanthus plant

    • Despatch: By end of September 2015
    •  
    • £13.99
    • 2 x 9cm potted agapanthus plants

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

Meconopsis 'Lingholm'

Himalayan Blue Poppy

 Customer Rating
A perennial wow factor for a difficult, damp shady corner. I just love the indescribable blue colour of Meconopsis blooms; once seen, never forgotten! This specially selected strain acts as a perennial too, lasting in the garden for many years. Height: 75cm (30"). Spread: 50cm (20").
More info
    • 2 meconopsis jumbo plug plants

    • Despatch: By end of March 2016
    •  
    • £12.99
    • 4 meconopsis jumbo plug plants

    • Despatch: By end of March 2016
    •  
    • £17.99

Lewisia 'Elise Mixed'

  • First lewisia to repeat flower throughout summer
Masses of starry flowers in a range of fruity colours, including stripes and picotees adorn slender stems above neat rosettes of fleshy leaves. Traditionally grown as perennials in alpine houses, new breeding has brought us Lewisia 'Elise Mixed' which flowers in its first year, making a bright and attractive annual bedding plant! Winner of a Fleuroselect Gold Medal, these exceptional plants repeat flower throughout summer, lighting up beds, borders, containers and rock gardens. Tolerating heat and drought well, Lewisia is also perfectly happy with cooler temperatures and will overwinter with protection from wet weather. Height: 25cm (10"). Spread: 30cm (12").
More info
    • 24 lewisia plug plants

    • Despatch: By end of August 2015
    •  
    • £16.99
    • 48 lewisia plug plants

    • Despatch: By end of August 2015
    •  
    • £21.99

Iris 'Re-Blooming Collection'

Bearded Iris

 Customer Rating

A beautiful selection of hardy, drought tolerant bearded iris with exceptional disease and insect resistance. With the first flowers appearing in spring, and a second flush in autumn, these really are outstanding hardy perennials; perfect for summer borders. These majestic, tall bearded iris flowers have a delicate scent and make impressive cut flowers for a vase indoors. Height: 90cm (36"). Spread: 30cm (12").


  • Collection comprises:
  • Iris 'Orange Harvest' - Rust orange flowers.
  • Iris 'Victoria Falls' - Light blue iris flowers.
  • Iris 'Cantina' - Violet blooms.
  • Iris 'Buckwheat' - Golden yellow petals.
  • Iris 'Pass the Wine' - Wine red flowers.
More info
    • 5 Iris rhizomes - 1 of each variety

    • Despatch: By end of January 2016
    •  
    • £14.99
    • 10 Iris rhizomes - 2 of each variety

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

Meconopsis baileyi 'Hensol Violet'

Himalayan Blue Poppy, Tibetan Blue Poppy, Meconopsis betonicifolia

  • New in 2015
The 'must-have' Himalayan Blue Poppy' has a rival in this exquisite cultivated form. Bright violet-purple, almost shimmering flowers, with the merest hint of red, make a stunning addition planted in groups in shady borders and woodland areas. This 'collectors plant' still surprises countless poppy-lovers who have never seen this unusual perennial before. Meconopsis betonicifolia 'Hensol Violet' is so named for its origins from Hensol Castle, South Wales, where it was discovered by Lady Henderson. Height: 90 (36"). Spread 30cm (12").
More info
    • 1 x 9cm potted meconopsis plant

    • Despatch: By end of October 2015
    •  
    • £11.99
    • 2 x 9cm potted meconopsis plants

    • Despatch: By end of October 2015
    •  
    • £17.99

Lupin 'Russell Hybrids Mixed'

Lupinus

Tall spires of tightly packed flowers rise above clumps of palmate foliage in a magical array of colours. This wonderful mix of the ever popular 'Russell Hybrids' is ideal for adding height and structure to the back of perennial borders and woodland edges. A distinctive hardy perennial that remains a cottage garden favourite. Height: 90cm (36"). Spread: 50cm (20"). More info
    • 3 x 5cm potted lupin plants

    • Despatch: By end of August 2015
    •  
    • £9.99
    • 6 x 5cm potted lupin plants

    • Despatch: By end of August 2015
    • SAVE £6.99  
    • £19.98 £12.99

Giant Fragrant Cowslip

Primula florindae, Tibetan Cowslip

Stiff stems carry whorls of sulphur yellow, tubular, flowers with a delicate, sweet fragrance. Once established, Giant Cowslips will naturalise to form swathes of lush, mid green foliage that makes ideal groundcover for natural planting schemes. With an RHS AGM, Primula florindae makes a superb choice for a damp, shady corner where other plants won't grow. Height: 90cm (35"). Spread: 50cm (20").
More info
    • 3 fragrant cowslip jumbo plug plants

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 6 fragrant cowslip jumbo plug plants

    • Despatch: By end of September 2015
    •  
    • £17.99

Perennial Ground Cover Collection

  • New in 2015

Our ground cover collection of hardy herbaceous perennials brings so many benefits, which all lead to one thing: low maintenance gardening. We've selected some of our best low-growing perennials to offer a range of planting solutions. Use them as front of border plants in large sunny borders or set them in dappled shade as underplanting to trees and shrubs. You can even try them in pots and use your new perennial containers alongside seasonal pots. Every plant in the mix offers a controlled spreading habit, helping to quickly fill borders, cover soils and prevent weeds taking hold. And less weeding leads to more time spent enjoying your garden!


  • Perennial Ground Cover Collection comprises:
  • Arabis 'Lotti Pink' - A spring flowering, cushion-like perennial.
  • Armeria 'Ballerina Mixed' - Dense cushions of bright green foliage produce spherical flower heads set atop sturdy upright stems.
  • Dianthus deltoides 'Red' - Neat clumps of silver green foliage that makes stunning ground cover.
  • Campanula 'Dwarf Blue' - Cushion-like plants, which are smothered in violet-blue flowers through the summer months.
  • Aubrieta 'Mixed' - These tough little plants will thrive in the poorest of soils, forming dense mats of evergreen foliage.
  • Erigeron 'Stallone' - This cheery clump forming perennial enjoys light sandy soils, making it ideal for coastal gardens.

Powerliner® plugs are well established, mature plugs which can be potted on or can be planted straight into the border or containers. Each plug module is 6.5cm in diameter.
More info
    • 6 Powerliner plug plants - 1 of each variety

    • Despatch: By end of September 2015
    •  
    • £8.99
    • 12 Powerliner plug plants - 2 of each variety

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

Iris siberica Collection

  • New in 2015

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: By end of October 2015
    •  
    • £12.99

Perennial Bumper Collection

  • New in 2015
Fill your beds and borders with this generous collection of herbaceous perennials. Perennial plants bloom year after year, and many can also be cut and brought into the house for beautiful flower arrangements.

  • Collection contains one each of the following varieties:
  • Rudbeckia 'Goldsturm' - Bright, golden-yellow, daisy flowers with dark button eyes.
  • Verbascum 'Banana Custard' - Strong, erect spikes packed with dazzling two-tone yellow flowers.
  • Lobelia 'Starship Scarlet' - Ruby-red, glossy foliage and punchy, scarlet-red flower spikes.
  • Achillea 'Red Berries' - Panicles of red flowers above aromatic, fern like foliage.
  • Verbena 'Buenos Aires' - A drought resistant perennial with glowing clusters of purple flowers.
  • Erigeron 'Blue Beauty' - Showy lavender blue daisies throughout the summer.
  • Hollyhock 'Halo' - A stunning cottage garden perennial for the back of the border.
  • Poppy 'Fruit Punch' - Enchanting weather resistant silky, ruffled blooms.
  • Digitalis 'Dalmatian' - Well branched, compact plants for the back of the border.
  • Scabious 'Beaujolais Bonnets' - Rich burgundy flowers with contrasting paler outer petals and white stamens.
  • Gaillardia 'Mesa Peach' - Bright gold and peach tones bring instant sunshine to the front of borders.
  • Geum 'Blazing Sunset' - Fully double, scarlet red flowers rise above clumps of foliage on thin, wiry stems.
  • Agastache foeniculum - Blue flower spikes appear above silvery-green, aniseed scented foliage.
  • Monarda 'Bergamo' - Aromatic foliage and whorls of spidery blooms that attract insects to your garden borders.
  • Oenothera 'Apricot Delight' - A beautifully scented Evening Primrose with colour-changing blooms.
  • Nepeta 'Hot Pink' - Catmint is well loved by gardeners and their cats for its sweet, pungent aroma and pretty flowers.
  • Dianthus 'Bananaberry Fizz' - Double magenta and yellow flowers on sturdy plants.
  • Salvia 'New Dimension Blue' - Violet blue flower spikes attract bees and butterflies.
  • Arabis 'Lotti Pink' - Uniform, well-branched plants with a neat compact habit are covered with pink blooms.
  • Erigeron 'Stallone' - Fast growing, carefree plants with two tone daisy flowers.
  • Dianthus deltoides 'Red' - Neat clumps of silver green foliage host plenty of small red flowers.
  • Campanula 'Dwarf Blue' - A proliferation of soft blue flowers on compact dwarf plants.
  • Aubrieta 'Mixed' - Tough little plants that will thrive in the poorest of soils.
  • Armeria 'Ballerina Mixed' - Globe shaped blooms above cushions of grassy foliage.

Powerliner® plugs are well established, mature plugs which can be potted on or can be planted straight into the border or containers. Each plug module is 6.5cm in diameter.
More info
    • 24 powerliner plug plants - 1 of each variety

    • Despatch: By end of September 2015
    •  
    • £24.99