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 133 products.
 

Blechnum brasiliense 'Volcano'

Dwarf Brazilian Tree Fern, Hard Fern

  • New in 2015
  • Hardy down to -5c in the UK
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 fern thrives in low light, so it's perfect for giving an exotic touch to your home and garden. Despite its tropical origins, Blechnum brasiliense is hardy enough to be grown in most UK gardens, tolerating temperatures down to -5C (23F) 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

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

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

Lewisia 'Safira Collection'

  • New in 2015
This collection of hardy lewisia plants offers a unique colour mix and the longest flowering season we've seen - continuous colour from March to November! We've saved the stripes and picotees for other mixes in our range, to bring you a classy colour collection for use in sunny borders, rock gardens and patio containers. This low growing hardy perennial is covered in masses of starry blooms as soon as spring gets going, and continues to perform right through to late autumn. This sun-loving perennial copes well with our cooler temperatures, but benefits being sheltered from winter rains. Lewisia Safira Collection offer superb performance for very little effort! Height and spread 20cm (9").
More info
    • 3 jumbo plug plants

    • Despatch: By end of October 2015
    •  
    • £14.99
    • 6 jumbo plug plants

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

Iris sibirica 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 November 2015
    •  
    • £12.99

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 September 2015
    •  
    • £14.99
    • 10 Iris rhizomes - 2 of each variety

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

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

Trollius 'Dancing Flame'

Globeflower

  • New in 2015
Add some heat to your border this autumn with Trollius 'Dancing Flame'. This Globeflower has everything you'd want from a border perennial; contained vigour, long flowering habit, care-free attitude, and years of garden performance! The glorious orange blooms just keep on coming right though early summer for 8 weeks of vibrant colour. This hardy herbaceous perennial thrives in moist soils but will cope with drought conditions once established. Height: 60cm (24"). Spread: 50cm (20").
More info
    • 1 x 9cm potted trollius plant

    • Despatch: By end of September 2015
    •  
    • £11.99
    • 2 x 9cm potted trollius plants

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

Perennial Fragrant Collection

  • New in 2015

A colourful mix of hardy perennials, all chosen for their fragrance and flower power. Drop them into gaps in the border or fill a whole new bed with this autumn planting perennial collection. There's something for every part of the garden in this elegant mix, which has been hand selected to guarantee colour and scent in the garden from June right though to the end of September. These hardy garden plants return each year to give a bigger and better display than the last - the perfect low maintenance option for high-end results.


  • Perennial Fragrant Collection includes:
  • Agastache foeniculum - Silvery-green foliage which is scented unmistakenly of aniseed.
  • Monarda 'Bergamo' - Deliciously aromatic foliage and whorls of spidery pink blooms.
  • Oenothera 'Apricot Delight' - Tightly scrolled buds open in palest lemon, maturing to yellow, apricot and finally salmon-pink.
  • Nepeta 'Hot Pink' - Pink flowered Catmint with pungent, aromatic foliage.
  • Dianthus 'Bananaberry Fizz' - Rich, clove-scented, double blooms in lemaon and magenta.
  • Salvia 'New Dimension Blue' - Intense violet blue flower spikes above aromatic 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
    • 6 Powerliner plug plants - 1 of each variety

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 12 Powerliner plug plants - 2 of each variety

    • Despatch: By end of September 2015
    •  
    • £14.99

1st Year Flowering Perennial Collection

  • New in 2015
An essential mix of hardy herbaceous perennials, all selected to bring big impact to your garden in their first year, and many more to come. This classic combination of cottage garden staples offers four months of continual floral colour from early summer into autumn, which gets better and bolder as the years go by - just perfect for adding shape and structure to your planting displays. There's something for every part of the border too. Set the towering spires of Digitalis 'Dalmatian' and Hollyhock 'Halo' at the back of your designs behind Poppy 'Fruit Punch' and Scabious 'Beaujolais Bonnets'. Front the display with Gaillardia 'Mesa Peach' and Geum 'Blazing Sunset' for a tiered show of lasting shape and colour.

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

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 September 2015
    •  
    • £9.99
    • 6 x 5cm potted lupin plants

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

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 September 2015
    • SAVE £3  
    • £14.99 £11.99
    • 3 Rose Lily Grass jumbo plug plants

    • Despatch: By end of September 2015
    • SAVE £3  
    • £19.99 £16.99