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.


For beautiful summer flowers browse our range of annual plants.



We have found 65 products.
 

Dianthus 'Perfumed Pinks' Collection

Carnation, Pink

Enjoy a garden filled with fragrance and colour this summer with this wonderful Perfumed Pinks Collection . Mounds of silver-green foliage produce an abundance of perfumed dianthus flowers. Perfect for borders and containers, or for cutting for a vase indoors. Height: 40cm (16"). Spread: 30cm (12"). Supplied as jumbo plugs.

  • Collection comprises:
  • Dianthus 'Cosmic Pink Swirl' - Pink and white petals with an almost shimmering effect.
  • Dianthus 'Cranmere Pool' - Palest pink petals with a touch of red deep within the ruffled centres.
  • Dianthus 'Doris' - Soft pastel pink blooms with a lovely fragrance.
  • Dianthus 'Letitia Wyatt'- Delicate baby pink blooms.
  • Dianthus 'Gran's Favourite' (x 5) - A popular and well known variety with pretty picotee edges.
More info
    • 5 dianthus Postiplug plants

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 10 dianthus postiplug plants

    • Despatch: By end of October 2016
    •  
    • £14.99
    • 20 dianthus postiplug plants

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

Heuchera 'Patchwork' Mix

Coral Flower, Coral Bells

 Customer Rating
Sprays of delicate, tiny flowers float on wiry stems above neat mounds of vibrant foliage. Prized for their colourful leaves, these versatile semi-evergreen perennials make excellent drifts of ground cover, adding a distinctive splash of colour to the front of borders, or even brightening winter containers. Their airy blooms attract bees and are also useful as cut flowers. Height and spread: 40cm (16").
More info
    • 3 heuchera Postiplugs

    • Despatch: By end of September 2016
    • + FREE £5 voucher  
    • £8.99
    • 5 heuchera Postiplug plants

    • Despatch: By end of September 2016
    •  
    • £14.99
    • 6 heuchera Postiplugs

    • Despatch: By end of September 2016
    • + FREE £5 voucher  
    • £12.99
    • 10 heuchera Postiplug plants

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

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.

 

4 for 3 on autumn planting bulbs
More info
    • 5 Iris rhizomes - 1 of each variety

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

    • Despatch: By end of September 2016
    • SAVE* £64.91  
    • £89.90 £24.99

Foxglove 'Dalmatian Mixed'

Digitalis purpurea

Digitalis 'Dalmatian Mixed' looks magnificent in cottage gardens and woodland borders - but thanks to their uniform branching habit, these statuesque foxgloves make fabulous annual bedding too! These short lived perennials will happily seed about to create dramatic drifts and attract wildlife to their nectar rich flowers. Height: 50cm (20"). Spread: 40cm (16").

Useful links:

Gardening news: Move over marigolds... new bedding plants fly in the face of tradition

More info
    • 6 foxglove plug plants

    • Despatch: By end of September 2016
    •  
    • £5.99
    • 24 foxglove plug plants

    • Despatch:
    •  
    • £13.99
    • Out of stock
    • 48 foxglove plug plants

    • Despatch:
    •  
    • £19.99
    • Out of stock

Heuchera 'Stormy Seas' (Large Plant)

Heuchera are an excellent choice for easy to grow ground cover in difficult spots in the garden; plants are super tough and easy to grow. Heuchera 'Stormy Seas' has maroon-red foliage, with green undersides, with creamy-white bell flowers, on tall spikes during the summer.

Heuchera can be grown in perennial borders, bedding schemes, or in mixed summer and autumn containers and baskets. Heuchera are versatile evergreens for growing in either sun or part shade. Height and Spread: 40cm (16").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 2 litre potted heuchera plant

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 2 litre potted heuchera plants

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

Dianthus 'Gran's Favourite'

Carnation, Pink

This well loved RHS AGM variety is as popular as ever for its white blooms with raspberry picotee edges. The clove scented flowers of Dianthus 'Gran's Favourite' are produced in abundance above a carpet of silvery green foliage. With such a prolific flowering period there will be plenty of blooms to spare for a vase indoors. This super little Pink is perfectly hardy and a makes a lovely addition to the front of cottage garden borders. Height and spread: 40cm (16").


Culinary note: Use the clove like tasting petals for adding to cakes, either for flavour or decorating, suitable for soups, salads and sauces too. For more details about edible flowers click here.

More info
    • 5 dianthus Postiplug plants

    • Despatch: By end of October 2016
    • save £2  
    • £9.99 £7.99
    • 10 dianthus Postiplug plants

    • Despatch: By end of September 2016
    • SAVE £2  
    • £14.99 £12.99

Gerbera 'Sweet Collection' (Hardy)

Barberton Daisy, Transvaal Daisy

 Customer Rating
  • Bigger and better winter hardy gerberas
  • Three seasons of stunning colour
Growing Gerberas outdoors was virtually inconceivable ten years ago. Now these 2nd generation hardy Gerberas can be grown year round in the border! Gerbera 'Sweet Collection' produces plenty of classic daisy blooms that are twice the size of other hardy Gerberas, and make fabulous cut flowers. Blooming reliably from June to October, these wonderful clump forming hardy perennials make a big impact in borders and patio containers. Height and spread: 45cm (18").
More info
    • 3 x 7cm potted gerbera plants (1 of each variety)

    • Despatch: By end of October 2016
    • SAVE £10  
    • £19.99 £9.99

Silene x robotii 'Rollys Favourite' (Large Plant)

Silene 'Rolly's Favourite' is a unique hybrid crossed with Lychnis. This unusual variety will produce bubblegum pink blooms on loosely sprawling plants from spring to autumn, making it perfect for the patio or to soften the edges of borders. Campion plants thrive in full sun or dappled shade, and are bushy, with almost more flowers than foliage! Silene are a group of fuss-free, hardy perennials, which are often overlooked when it comes to being planted into the garden. These underused plants are well worth growing for their flowering performance, and carefree attitude. Height and spread: 40cm (16").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 2 litre potted silene plant

    • Despatch: By end of September 2016
    •  
    • £10.99
    • 2 x 2 litre potted silene plants

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

Dianthus 'Ever-blooming Mixed' (Hardy)

Carnation

Strong upright stems carry large ruffled blooms in a vibrant mix of red, orange, yellow and pink carnations. These hardy perennial dianthus are cottage garden essentials. The fragrant carnation flowers are excellent for cutting for a bright display indoors. Perfectly proportioned for the front of sunny borders where their mounds of silvery green foliage remain evergreen throughout the year. Height: 60cm (24"). Spread: 40cm (16").

 

Culinary note: Dianthus flowers are edible.

Culinary note: Use the clove like tasting petals for adding to cakes, either for flavour or decorating, suitable for soups, salads and sauces too. For more details about edible flowers click here.

More info
    • 6 dianthus plug plants

    • Despatch: By end of September 2016
    •  
    • £5.99
    • 72 dianthus plug plants

    • Despatch: By end of September 2016
    • Double up 36 to 72 for £5 extra  
    • £15.99

Hellebore 'Single Clear White' (Large Plant)

Helleborus

Hellebores are one of the first flowers to welcome a New Year in the garden, and sometimes even begin flowering in December. The Christmas Rose is ideal for shady borders, and makes useful ground cover underneath trees and shrubs.

Hellebores have colourful, nodding, cup-shaped flowers, which are long-lasting. Hellebore 'Single Clear White' produces some of the most beautiful, white flowers, and will give unmissable colour in the winter garden. Grow evergreen Hellebores in long, sweeping borders or large patio pots, they establish easily and quickly form neat clumps of growth. 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 November 2016
    •  
    • £11.99
    • 2 x 3 litre potted hellebore plants

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

Scabious 'Butterfly Blue' (Large Plant)

Scabiosa atropurpurea

As the name suggests, this pretty Pincushion Flower is a butterfly magnet. From July to October the long lasting, lavender blue flowers of Scabious 'Butterfly Blue' are produced on slender stems above clumps of grey-green, lance shaped foliage. This cottage garden favourite makes a lovely display when planted in large drifts throughout borders. Perfect for wildlife areas, sunny herbaceous borders and cut flower gardens. Height and spread: 40cm (16").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre potted scabious plants

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

Red Hot Poker 'Lemon Popsicle' (Large Plant)

Kniphofia

From the new 'Popsicle series', this lovely little perennial bears upright spikes of bright yellow flowers from June right through to October. Red Hot Poker 'Lemon Popsicle' is specially bred for a dwarf habit, attractive grassy foliage and high impact colour. This compact evergreen has a long flowering period making it a worthy choice for year round interest in even the smallest of gardens. Like all kniphofia, it is resilient, low maintenance and easy to grow. Height: 35cm (14"). Spread: 40cm (16").

 

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

    • Despatch: By end of September 2016
    •  
    • £12.99
    • 2 x 3 litre potted kniphofia plants

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