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 211 products.
 

Pansy 'Matrix™ Mixed'

Viola x wittrockiana

 Customer Rating
  • Colour throughout winter and spring
  • 100% bigger, better and stronger than Pansy 'Universal'

This vibrant blend has been specially bred for their excellent branching habit and super size flowers; and the results speak for themselves! The compact sturdy stems hold their vibrant flower heads high, whatever the weather brings to ensure your garden is filled with colour. Easy to grow, Pansy 'Matrix Mixed' is the perfect plant for all your containers and bedding displays. Height and spread: 23cm (9").


Culinary note: Some parts of these flowers are edible. The crystallised petals are great decorations for cakes and cookies, or they can be added straight to green salads for an injection of colour. For more details about edible flowers click here.

More info
    • 36 pansy plug plants

    • Despatch: By end of August 2016
    • + FREE £5 voucher  
    • £6.99
    • 72 pansy plug plants

    • Despatch: By end of August 2016
    • + FREE £5 voucher  
    • £9.99

Dianthus 'Scents of Summer Collection'

Pink, Carnation

  • T&M Exclusive

Immerse your senses in Dianthus 'Scents of Summer Mixed'! We've hand selected a range of modern dianthus plants to offer bright colours, strong garden performance and multi-flowering stems, while retaining the vintage spicy fragrance of garden pinks. The extreme flower power of these hardy perennials means you'll enjoy 100s of cut flower blooms through the summer, every year, with plenty left on the plants to keep them looking good in the garden. Height and spread: 30cm (12").


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 August 2016
    • SAVE £5  
    • £9.99 £4.99
    • 10 dianthus Postiplug plants

    • Despatch: By end of August 2016
    • SAVE £7.50  
    • £14.99 £7.49
    • 20 dianthus Postiplug plants

    • Despatch: By end of August 2016
    • SAVE £12.50  
    • £24.99 £12.49

Hollyhock rosea 'Pleniflora' (Large Plant)

Alcea rosea

Hollyhocks are classic cottage garden perennials. They provide spires of ruffled, pompom blooms, which are excellent for adding colour and height to summer borders. Plant Hollyhock 'Pleniflora' at the back of borders where their striking blooms will tower over lower growing plants. Height: 180cm (71"). Spread: 60cm (24").

Culinary note: try crystallising the flowers for a tasty cake decoration, or use them to make a delicately flavoured syrup to use with puddings. For more details about edible flowers click here.

 

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

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 2 x 1 litre potted hollyhock plants

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

Aquilegia vulgaris 'William Guinness' (Large Plant)

The striking black bonnets of Aquilegia 'William Guiness' make a superb contrast with the white corolla. The exquisite blooms of this classic cottage garden perennial are carried on wiry stems, set above pretty ferny foliage. This hardy Columbine is perfect for en masse in borders and shady woodland edges, and makes an attractive cut flower for a vase indoors. Height: 75cm (30"). Spread: 30cm (12").

 

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

    • Despatch: By end of July 2016
    •  
    • £9.99
    • 2 x 1 litre potted aquilegia plants

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

Corydalis flexuosa 'Purple Leaf' (Large Plant)

Corydalis flexuosa 'Purple Leaf' is an unusual garden plant, which is often admired. Plants may look delicate, but they're quite robust, and enjoy our cool English summers. Flowering can often persist from late spring into the middle of summer.

Corydalis plants will effortlessly form clumps in borders, rockeries and shady corners. The foliage is ferny and purple, tinged with red. The accompanying flowers are tubular and in a dashing shade of bottle blue. Height: 15cm (6"). Spread: 50cm (19").

 

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

    • Despatch: By end of July 2016
    •  
    • £9.99
    • 2 x 1 litre potted corydalis plants

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

Shasta Daisy 'Goldfinch' (Large Plant)

Leucanthemum × superbum

This exciting modern cultivar is the most yellow Leucanthemum to date. The semi double blooms of Shasta Daisy 'Goldfinch' open a bright lemon colour that slowly fades to pale ivory as the blooms age. This compact variety is well branched and bushy, flowering for weeks from late spring onwards and attracting bees and butterflies to its nectar rich blooms. This reliable hardy perennial is undemanding and easy to grow in borders and wildlife areas. It also makes a lovely cut flower. Height and spread: 60cm (24").

 

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

    • Despatch: By end of August 2016
    •  
    • £12.99
    • 2 x 3 litre potted leucanthemum plants

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

Foxglove 'Milk Chocolate' (Large Plant)

Digitalis parviflora

Rich chocolate coloured flowers tightly fill the slender flower spikes of this superb Foxglove. Digitalis parviflora 'Milk Chocolate' is a rarely seen variety with glossy foliage that complements the unusual blooms. Native to Spain, this Foxglove is surprising hardy and enjoys a lightly shaded position in the garden. The nectar rich blooms prove particularly attractive to bees, making this a useful addition to wildlife areas. Pair it with white flowered Digitalis for a particularly elegant contrast. Height: 60cm (24"). Spread: 30cm (12").

 

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

    • Despatch: By end of July 2016
    •  
    • £9.99
    • 2 x 1 litre potted digitalis plants

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

Daylily 'Stella in Red' (Large Plant)

Hemerocallis

They always say daylilies are un-killable, and we think that's quite accurate; plants are hardy, very tough, will grow in most positions, producing lily-like flowers. Daylily 'Stella in Red' has ruby-red, gently fragrant flowers, which last a day each, but are borne on compact, grassy plants all through the summer. Plant up Hemerocallis plants into mixed garden borders or large pots. Daylilies are ideal for beginners and smaller gardens, are rabbit resistant, and last many years. Height: 30cm (12") and Spread: 45cm (18").

Culinary note: Try day lily petals in salads, soups or cooked and served as a vegetable. For more details about edible flowers click here.

 

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

    • Despatch: By end of July 2016
    •  
    • £9.99
    • 2 x 1 litre potted Daylily plants

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

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

Campanula lactiflora 'Dwarf Pink' (Large Plant)

The Milky Bellflower has long been a cottage garden favourite. This pretty cultivar bears a profusion of rose-pink, star shaped flowers from May to August which provide a valuable source of nectar for bees and other pollinators. Although not as small as its name might suggest, Campanula lactiflora 'Dwarf Pink' is certainly more compact than the rest of its species, maintaining a neat habit in garden borders. This hardy perennial is quick to flower and perfect for filling gaps in herbaceous borders. The blooms make an attractive cut flower too. Height: 90cm (35"). Spread: 45cm (18").

 

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

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 2 x 1 litre potted campanula plants

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

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 August 2016
    •  
    • £14.99
    • 10 Iris rhizomes - 2 of each variety

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

Acanthus spinosus (Large Plant)

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: By end of August 2016
    •  
    • £10.99
    • 2 x 1 litre potted acanthus plants

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