Thompson & Morgan

Important delivery notice
The products on this site are only delivered to UK addresses. If you require delivery to another country please visit one of our other sites below.

Refine Results

Refine by..

Email Newsletter

Sign up to our newsletter

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 41 products.
 

Gaillardia 'Snappy'

Blanket Flower

  • Finally, a gaillardia that lasts for years in the garden
Finally, a long-lasting gaillardia for years of pleasure in the garden. Blanket Flowers have a reputation for being unreliably perennial but new Gaillardia 'Snappy' makes that a thing of the past. We can now offer you unrivalled flower power alongside true perennial reliability for years of vibrant border and container colour. This world-class introduction offers non-stop flowering on sturdy, compact, upright plants from mid-summer through to late autumn. The red and yellow blooms also take on a purple sheen in the summer sunshine and will be much loved by bees, butterflies and other pollinators. Height and spread: 30cm (12").
More info
    • 5 gaillardia Postiplug plants

    • Despatch: By end of May 2016
    • SAVE £2  
    • £8.99 £6.99
    • 10 gaillardia Postiplug plants

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

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 May 2016
    • SAVE £10  
    • £19.99 £9.99

Gaillardia 'Arizona Sun' (Garden Ready)

Blanket Flower

  • The fast-track to a hassle-free garden - just plant, water and enjoy!
  • Quality plants delivered to your door, hardened off and ready to plant out
  • Fully-grown, super-robust, healthy plants
Our garden ready plants are selected for garden performance, straight from the nursery. We send them to you 'green' ahead of flowering (but please note some varieties may show a few blooms), which means plants will establish quickly and all their energy goes into producing better roots, so they produce more flowers throughout the season.

A blaze of summertime colour that thrives, whatever the weather! The glorious daisy flowers of Gaillardia 'Arizona Sun' produce a constant display of large flower heads in fiery shades of orange, yellow and red. The cheery blooms persist well into autumn, and make spectacular cut flowers for an indoor display. This low maintenance, hardy perennial is trouble-free and even copes well on poor, dry soils. Perfect for containers or filling gaps at the front of sunny borders. Height: 30cm (12"). Spread: 45cm (18").

 

Garden ready special offer
More info
    • 30 gaillardia garden ready plants

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

Gaillardia 'Arizona Sun'

Blanket Flower

A blaze of summertime colour that thrives, whatever the weather! The glorious daisy flowers of Gaillardia 'Arizona Sun' produce a constant display of large flower heads in fiery shades of orange, yellow and red. The cheery blooms persist well into autumn, and make spectacular cut flowers for an indoor display. This low maintenance, hardy perennial is trouble-free and even copes well on poor, dry soils. Perfect for containers or filling gaps at the front of sunny borders. Height: 30cm (12"). Spread: 45cm (18").

 

Buy this variety in a larger plant size
More info
    • 24 gaillardia plug plants

    • Despatch: By end of June 2016
    •  
    • £12.99
    • 48 gaillardia plug plants

    • Despatch: By end of June 2016
    • SAVE £7.99  
    • £25.98 £17.99

Helianthemum 'Peachy Keen'

Rock Rose, Sun Rose

  • T&M Exclusive

Giving you a glorious display of colour from spring to midsummer, these Rock Roses are both versatile and trouble free. Our new peach flowered variety, Helianthemum 'Peachy Keen', has an overwhelming abundance of petals, which further boosts the display in your garden. This tough, hardy and drought resistant alpine, will produce a second flush of flowers in late summer, if pruned after the first blooming. 'Peachy Keen' can be used as groundcover or an addition to a rockery, either way, it will be also loved by bees and other insects. . Height: 20cm (8"). Spread: 30cm (12"). Evergreen/semi-evergreen.

More info
    • 5 helianthemum jumbo plug plants

    • Despatch: By end of May 2016
    •  
    • £14.99
    • 10 helianthemum jumbo plug plants

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

Helianthemum Collection

Rock Rose, Sun Rose

These tough little rock roses are hardy, drought tolerant and trouble-free, producing glorious colour from late spring to midsummer. If pruned after flowering, they'll even reward you with a second flush of blooms in late summer! The nectar-rich flowers, set against a backdrop of silvery, semi-evergreen foliage, are loved by bees and other insects. This helianthemum collection makes excellent groundcover or a versatile addition to rockeries or hot, dry borders. Height: 20cm (8"). Spread: 30cm (12").
  • Collection comprises the following varieties:
  • Helianthemum 'Ben Mohr' - Orange, saucer shaped flowers.
  • Helianthemum 'Pink Angel' - An abundance of delicate double, pink flowers.
  • Helianthemum 'The Bride' - A pretty, white rock rose with an RHS Award of Garden Merit.
  • Helianthemum 'Ben Fhada' - Bright, primrose yellow blooms with golden egg-yolk centres.
  • Helianthemum 'Peachy Keen' - New peach bloomed variety 'Peachy Keen' has an overwhelming amount of petals, further boosting the effect in your garden!
More info
    • 5 helianthemum jumbo plug plants - 1 of each variety

    • Despatch: By end of June 2016
    •  
    • £14.99
    • 10 helianthemum jumbo plug plants - 2 of each variety

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

Gerbera 'Sweet Dreams'

Barberton Daisy, Transvaal Daisy

  • T&M exclusive
  • 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 Dreams' produces plenty of cerise pink 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
    • 1 x 7cm potted gerbera plant

    • Despatch: By end of May 2016
    • SAVE £3  
    • £9.99 £6.99

Helianthemum Collection

Rock Rose, Sun Rose

These tough little rock roses are hardy, drought tolerant and trouble-free, producing glorious colour from late spring to midsummer. If pruned after flowering, they'll even reward you with a second flush of blooms in late summer! The nectar-rich flowers, set against a backdrop of silvery, semi-evergreen foliage, are loved by bees and other insects. This helianthemum collection makes excellent groundcover or a versatile addition to rockeries or hot, dry borders. Height: 20cm (8"). Spread: 30cm (12").
  • Collection comprises the following varieties:
  • Helianthemum 'Ben Mohr' - Orange, saucer shaped flowers.
  • Helianthemum 'Pink Angel' - An abundance of delicate double, pink flowers.
  • Helianthemum 'The Bride' - A pretty, white rock rose with an RHS Award of Garden Merit.
  • Helianthemum 'Ben Fhada' - Bright, primrose yellow blooms with golden egg-yolk centres.
More info
    • 4 helianthemum jumbo plug plants - 1 of each variety

    • Despatch: By end of May 2016
    •  
    • £11.99
    • 8 helianthemum jumbo plug plants - 2 of each variety

    • Despatch: By end of May 2016
    •  
    • £15.99

Creeping Thyme (Large Plant)

Thymus serpyllum

One of the most useful kitchen herbs, this aromatic, evergreen creeping thyme will grow almost anywhere in containers, rock gardens, and even in cracks between paving. Ideal for creating low, carpets of groundcover that will attract bees to the tiny, pink blooms. Thyme is particularly useful in coastal areas where it copes well with winds and dry conditions. Height: 20cm (8"). Spread: 45cm (18").

 

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

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 1 litre potted thymus plants

    • Despatch:
    •  
    • £14.99
    • Out of stock

Heuchera 'Berry Smoothie' (Large Plant)

Coral Flower, Coral Bells

Claret red veins pattern the pink foliage of Heuchera 'Berry Smoothie', which slowly ages to a deep burgundy by autumn. This new introduction is another eye-catching variety of this popular evergreen perennial. The creamy white flowers add extra interest in summer and prove particularly attractive to pollinating insects. A lovely choice for providing year round interest in patio containers and borders. Height: 45cm (18"). Spread: 50cm (20").

 

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

    • Despatch: By end of May 2016
    •  
    • £9.99
    • 2 x 1 litre potted heuchera plants

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

Peony 'Coral Sunset' (Large Plant)

Paeonia lactiflora, Herbaceous Peony

Herbaceous Peonies will last a lifetime in your garden; giving late spring displays of show-stopping, ruffled blooms each year for the minimum of effort! Plant them into the middle of herbaceous borders, where they will add structure and of course, rich colours.

Peony ‘Coral Sunset’ is especially recommended for its bowl-shaped blooms, which open coral pink, changing slowly to apricot and soft yellow. Imagine all these colours on one plant at the same time! Flowering in May, border Peonies are the perfect companions for Tulips! ‘Coral Sunset’ is a gold medal winner with the American Peony Society. Height: 80cm (31"). Spread: 55cm (21").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3.5 litre potted peony plant

    • Despatch: By end of April 2016
    •  
    • £14.99
    • 2 x 3.5 litre potted peony plants

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

Gaillardia x grandiflora 'Kobold' (Large Plant)

Blanket Flower, Gaillardia aristata 'Goblin'

An exceptionally long flowering hardy perennial, with flowers from June to September. Gaillaria x grandiflora ‘Kobold’ really stands out in the border too! When at their peak of flowering, these plants will be covered in flowers, so much so that you won’t see the foliage! Gaillardia are at their happiest in poor, sandy or stony soils, which is excellent for garden problem areas, and will survive periods of drought. Blanket Flower plants are hardy, and will come back year after year, and are ideal for beginners. Height: 30cm (12"). Spread: 45cm (18").

 

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

    • Despatch: By end of May 2016
    •  
    • £9.99
    • 2 x 1 litre potted gaillardia plants

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