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 39 products.
 

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").
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    • 3 heuchera Postiplugs

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

    • Despatch: By end of May 2016
    • SAVE £3  
    • £14.99 £11.99
    • 6 heuchera Postiplugs

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

    • Despatch: By end of May 2016
    • SAVE £5  
    • £24.99 £19.99

Heucherella 'Trailing Collection'

  • New hanging basket plant!

A cross between Heuchera and Tiarella, these trailing hardy perennials look fabulous billowing out of hanging baskets, window boxes and patio containers, where the broad-lobed, evergreen leaves provide all-year-round interest! Grow them alone for a fountain of foliage, or in mixed baskets to add texture and contrast. Vigorous and easy to grow, Heucherella 'Trailing Collection' also makes a fantastic groundcover plant for sun or part shade. Height: 25cm (10"). Spread: 60cm (24").


  • Collection comprises:
  • Heucherella 'Crimson Cascade' - Wonderful green to copper-red foliage with contrasting dark veins.
  • Heucherella 'Yellowstone Falls' - Striking lime green leaves with crimson markings.
  • Heucherella 'Redstone Falls' - Vibrant green and ruby red leaves creating a mixture of autumnal colours which change with the seasons.
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    • 3 heucherella jumbo plug plants

    • Despatch: By end of May 2016
    • SAVE £5  
    • £14.99 £9.99
    • 6 heucherella jumbo plug plants

    • Despatch: By end of May 2016
    • SAVE £7  
    • £19.99 £12.99

Echinacea 'Cheyenne Spirit Mixed'

Coneflower

  • The first cone flower for bedding plants
This colourful coneflower has a super branching habit that produces many more flowers per plant than other varieties. Its free flowering habit makes Echinacea 'Cheyenne Spirit Mixed' ideal as an unusual bedding plant. This vibrant mix contains a range of sought after colours for a really dazzling display. Like all coneflowers, these Echinacea are also ideal for growing in wildlife gardens and coastal positions. The flowers are great for cutting too! Height: 50cm (20"). Spread: 40cm (16").
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    • 12 echinacea plug plants

    • Despatch:
    •  
    • £11.99
    • Out of stock
    • 48 echinacea plug plants

    • Despatch:
    • SAVE £22.97  
    • £47.96 £24.99
    • Out of stock

Geranium 'Rozanne'

Geranium 'Gerwat'

  • Winner of The RHS Chelsea Flower Show 'Plant of the Centenary'
  • Unique long-flowering period for a Hardy Geranium

A celebrated Cranesbill producing masses of saucer shaped, violet-blue blooms with dainty white centres. Being a sterile hybrid, Geranium 'Rozanne' flowers repeatedly throughout the summer and won’t self-seed like other Geraniums. This hardy perennial makes excellent ground cover through the front of informal borders or spilling from containers. As summer ends the loose mounds of foliage colour to reddish brown and fiery orange for an extended display into autumn. Height: 30cm (12"). Spread: 60cm (24").


Useful links:

Geranium 'Rozanne gets our vote for RHS 'Plant of the Centenary'

 

More info
    • 1 geranium jumbo plug plant

    • Despatch: By end of May 2016
    •  
    • £9.99
    • 3 geranium jumbo plug plants

    • Despatch: By end of May 2016
    • SAVE £9.98  
    • £19.99

Delphinium 'Black Knight' (Large Plant)

Pacific Hybrid

An absolute cottage garden classic. Plant Delphiniums in bold clumps for back-of-the-border impact. Delphinium 'Black Knight' is an extra special variety with some of the deepest indigo-blue flowers, each with a black eye.

The sight of Delphiniums in a garden is simply divine. They flower from early summer, and will often flower twice. The plants are architectural and handsome, you certainly won't regret planting these handsome perennials! Height: 1.7m (5.5'). Spread: 75cm (29").

 

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

    • Despatch:
    •  
    • £11.99
    • Out of stock
    • 2 x 1 litre potted delphinium plants

    • Despatch:
    •  
    • £17.99
    • Out of stock

Red Hot Poker 'Fire Dance' (Large Plant)

Kniphofia, Torch Lily

The Red Hot Poker is instantly recognisable. This reliable perennial is an old favourite for mixed herbaceous borders. Kniphofia ‘Fire Dance’ is a particularly useful selection, as it’s extremely cold hardy. The scarlet and yellow blooms rise above dense clumps of evergreen foliage in summer.Plants also prove remarkably rabbit proof and these robust plants are loved by bees and butterflies too. Height: 50cm (20") Spread: 60cm (24").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
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    • 1 x 1 litre potted red hot poker plant

    • Despatch:
    •  
    • £12.99
    • Out of stock
    • 2 x 1 litre potted red hot poker plants

    • Despatch:
    •  
    • £19.99
    • Out of stock

Salvia nemorosa 'Marcus' (Large Plant)

Salvia are effortless, hardy plants for mixed borders. Salvia nemorosa ‘Marcus’ is a particularly special selection, with deep indigo flower spikes above clumps of aromatic foliage, the blooms coming in such density that they create a solid block of colour.

Salvia plants are deer resistant, rabbit resistant, and will attract bees and butterflies to your garden. Salvia ‘Marcus’ is short, neat and will make a strong feature towards the front of cottage garden borders and wildlife gardens. Trimming the plants in midsummer will encourage even more flowers! Height: 45cm (18"). Spread: 45cm (18").

 

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

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

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

Dicentra spectablis (Large Plant)

Lamprocapnos spectabilis, Bleeding Heart, Dutchman's Breeches, Lyre Flower

Charming rose-pink, heart shaped flowers dangle enticingly from elegant arching stems, giving this plant its common name of Bleeding Heart. This beautiful spring flowering perennial is one of the earliest to bloom each year, often continuing into early summer. The finely-cut foliage forms attractive clumps that increase year after year, at a slow but steady rate. This graceful hardy perennial enjoys a reliably moist soil, making it ideal for damp woodland areas as well as cottage garden borders. Dicentra spectabilis holds an RHS AGM for its superb garden performance and makes a worthy addition to any Spring garden. Height: 120cm (48"). Spread: 45cm (18").

 

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

    • Despatch: By end of May 2016
    •  
    • £12.99
    • 2 x 3 litre potted dicentra plants

    • Despatch: By end of May 2016
    • SAVE £5.99  
    • £25.98 £19.99

Red Hot Poker 'Lemon Popsicle' (Large Plant)

Kniphofia, Torch Lily

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
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    • 1 x 3 litre potted kniphofia plant

    • Despatch:
    •  
    • £12.99
    • Out of stock
    • 2 x 3 litre potted kniphofia plants

    • Despatch:
    •  
    • £19.99
    • Out of stock

Dicentra spectablis (Large Plant)

Lamprocapnos spectabilis, Bleeding Heart, Dutchman's Breeches, Lyre Flower

Charming rose-pink, heart shaped flowers dangle enticingly from elegant arching stems, giving this plant its common name of Bleeding Heart. This beautiful spring flowering perennial is one of the earliest to bloom each year, often continuing into early summer. The finely-cut foliage forms attractive clumps that increase year after year, at a slow but steady rate. This graceful hardy perennial enjoys a reliably moist soil, making it ideal for damp woodland areas as well as cottage garden borders. Dicentra spectabilis holds an RHS AGM for its superb garden performance and makes a worthy addition to any Spring garden. Height: 120cm (48"). Spread: 45cm (18").

 

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

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

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

Eucalyptus gunnii (Large Plant)

Eucalyptus divaricata, Cider Gum, Ironbark

Prune this eye catching, hardy evergreen into an attractive shrub, or let it to grow into a magnificent tree. Young plants bear silvery blue foliage before producing more linear green leaves as the tree ages. Stems of eucalyptus leaves are excellent for adding to cut flower arrangements! The attractive flaking bark reveals exquisite shapes and patterns on the main trunk of mature specimens. Eucalyptus gunnii is fast growing and easy to care for, making an outstanding specimen plant. Height: Up to 25m (80ft) if not pruned. Spread: Up to 10m (32ft) if not pruned.

 

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

    • Despatch: By end of July 2016
    •  
    • £14.99
    • 2 x 3.5 litre potted eucalyptus plants

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

Acanthus spinosus (Large Plant)

Bear's Breeches

Acanthus spinosus is robust, architectural plant with exotic-looking foliage and erect spikes of equally exotic blooms. They may look tropical, but Acanthus is fully hardy in the UK, and enjoys sun or shade on a well-drained soil, is very drought tolerant and can tolerate exposed conditions.

Acanthus are also known as Bear's Breech, they make an excellent herbaceous perennial for mixed borders, growing up to 1.2m (3.9') and filling gaps easily. The spiny, purple-tinged flowers appear from late spring to summer. An easy to maintain border plant that comes back year after year. Height: 1.2m (3.9'). Spread: 1m (39").

 

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

    • Despatch:
    •  
    • £10.99
    • Out of stock
    • 2 x 1 litre potted acanthus plants

    • Despatch:
    •  
    • £19.99
    • Out of stock