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 18 products.
 

Stock 'Most Scented Mix' (Garden Ready)

Matthiola incana, Gillyflower

  • 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.

Specially selected for their strong and spicy fragrance and fabulous colours! Start growing Stock 'Most Scented Mix' in autumn for spring borders that will look and smell incredible. These pretty Gillyflowers make superb bedding plants and don't forget to cut some for a vase indoors too. Height: 30cm (12"). Spread: 20cm (8").

 

More info
    • 30 stock garden ready plants

    • Despatch: By end of September 2015
    • Buy 2 packs for just £25  
    • £17.99

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 September 2015
    •  
    • £14.99
    • 10 helianthemum jumbo plug plants - 2 of each variety

    • Despatch: By end of September 2015
    •  
    • £19.99

Gaura lindheimeri 'Rosyjane' (Large Plant)

Gaura is a welcome addition to a mixed perennial border. The wiry, informal plants will fill gaps quickly and easily, with flowers from May to September, that's 5 months of summer colour!

Gaura ‘Rosyjane' is a breeding breakthrough, with large flowers, pure white and edged in candy pink. A star of the Chelsea Flower Show, and a real treat for your cottage garden border! Quick to establish and form clumps. Height and Spread: 60cm (24").

More info
    • 1 x 2 litre potted gaura plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 2 litre potted gaura plants

    • Despatch: By end of September 2015
    •  
    • £16.99

Penstemon digitalis 'Husker Red' (Large Plant)

Beard Tongue

Sophisticated elegance, coupled with real staying power! These bushy, hardy perennials form neat semi evergreen clumps, with long summer displays of trumpet-like florets. Penstemon 'Husker Red' is distinctly different, with ruby-red foliage, and blush-white flowers.

Penstemon plants are known for being tough, reliable perennials, which will flower all summer long and into autumn. Penstemon 'Husker Red' also battles through rain and drought, and is remarkably slug resistant too. A classic cottage garden plant. Height and Spread: 50cm (20").

More info
    • 1 x 1 litre potted penstemon plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 1 litre potted penstemon plants

    • Despatch: By end of September 2015
    •  
    • £16.99

Geum 'Banana Daiquiri' (Cocktails series) (Large Plant)

Avens

The refreshing, lemon yellow flowers of Geum 'Banana Daiquiri' are borne above neat clumps of semi evergreen foliage in late spring. Carried on fuzzy stems, each bloom is semi double with a whirl of yellow anthers at its centre. This neat little Avens makes a useful hardy perennial for the front of borders. Take a few of the blooms for a late spring posy - they make great cut flowers! Height: 45cm (18").Spread: 35cm (14"). More info
    • 1 x 1 litre potted geum plant

    • Despatch: By end of August 2015
    •  
    • £7.99
    • 2 x 1 litre potted geum plants

    • Despatch: By end of August 2015
    •  
    • £12.99

Geum 'Fireball' (Large Plant)

Avens

Ruffled, semi double flowers with gently scalloped edges make an eye catching display from May to July. Geum 'Fireball' is longer flowering than older cultivars and equally well loved by pollinating insects. This compact little Avens forms a neat clump of foliage that sits nicely at the front of borders. An easy to grow and undemanding hardy perennial, that also makes a nice cut flower. Height and spread: 45cm (18"). More info
    • 1 x 2 litre potted geum plant

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 2 x 2 litre potted geum plants

    • Despatch: By end of September 2015
    •  
    • £19.99

Gypsophila cerastioides (Large Plant)

Mouse-ear gypsophila

A small type of Gypsophila which is drought tolerant, tough and produces endless supplies of white flowers, which are loved by butterflies.

The Mouse Eared Gypsophila is good for alpine gardens, rockeries, patio containers, troughs or for growing in gaps in walls and paving. The tufted, mounding plants produce flowers from spring to summer. Height: 5cm (2"). Spread: 15cm (6").

More info
    • 1 x 1 litre potted gypsophila plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 1 litre potted gypsophila plants

    • Despatch: By end of September 2015
    •  
    • £16.99

Scabious 'Vivid Violet' (Large Plant)

Scabiosa

A relatively low growing variety with mauve-purple pincushion flowers carried above finely cut foliage. Scabious 'Vivid Violet' is more mildew resistant than many cultivars, and particularly free flowering from July to September. Like all Scabious, the blooms are a magnet for bees and butterflies and make useful cut flowers too. Its low, mounding habit makes this hardy perennial a welcome addition to rockeries and the front of sunny borders. Height: 35cm (14"). Spread: 45cm (18"). More info
    • 1 x 3 litre potted scabiosa plant

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 2 x 3 litre potted scabiosa plants

    • Despatch: By end of September 2015
    •  
    • £19.99

Verbascum olympicum (Large Plant)

Verbascum longifolium var. pannosum, Olympian Mullein

For almost instant impact in cottage garden borders, look no further than Verbascum olympicum. This imposing perennial will fill a gap in hot dry borders and makes a spectacular focal point, growing to 2 metres in next to no time! The felted, silver rosette of basal foliage plays host to tall spikes of buttery-yellow flowers. Verbascum olympicum is a relatively short lived perennial, which tends to bloom in its third year, and often dies after its spectacular display. However this Mullein is a vigorous self-seeder so you can look forward to plenty of new seedlings popping through the soil to take its place.

This low maintenance perennial is an excellent summer addition to borders, performing best in poor soils where many other plants would struggle to establish. A low maintenance Mullein for cottage gardens and wildlife gardens. Height: 2m (6.6'). Spread: 60m (24").

More info
    • 1 x 1 litre potted verbascum plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 1 litre potted verbascum plants

    • Despatch: By end of September 2015
    •  
    • £16.99

Gaura lindheimeri 'Sparkle White'

This stunning hardy perennial makes a fabulous border plant! Its graceful, slender stems are topped with a flurry of dazzling white, starry blooms that still look fresh and airy at the end of summer. This bushy, clump forming variety has a neat, compact habit that makes it perfect for the front of sunny borders or edging paths as a mini hedge. Once established, Gaura lindheimeri 'Sparkle White' even copes well during periods of drought. Height and spread: 45cm (18").
More info
    • 24 gaura plug plants

    • Despatch: By end of March 2016
    •  
    • £12.99
    • 48 gaura plug plants

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

Dianthus barbatus 'Sweet'

Sweet William

  • Summer-flowering Sweet Williams!

Enjoy these delightfully fragrant Sweet Williams all summer long! Clusters of sweetly scented flowers in shades of red, white and purple are borne atop stiff upright stems from June through to September. Superb for cutting for a vase indoors, the vibrant flowers of Dianthus barbatus 'Sweet' are also attractive to bees. Often grown as a biennial, this short lived perennial is ideal for cottage garden beds and borders. Height: 45cm (18"). Spread: 30cm (12").


Culinary note: Some parts of these flowers are edible. For more details about edible flowers click here.

More info
    • 6 dianthus plug plants

    • Despatch:
    •  
    • £4.99
    • Out of stock
    • 24 dianthus plug plants

    • Despatch: By end of March 2016
    •  
    • £13.99
    • 48 dianthus plug plants

    • Despatch: By end of March 2016
    •  
    • £18.99

Salvia x jamensis 'Hot Lips'

Sage

Spice up your summer patio pots with Salvia 'Hot Lips'. Naturally bushy plants boast eye-catching flower spikes with open-mouthed, bicolour blooms. In particularly hot weather look out for individual flowers in solid red or solid white. The aromatic foliage has a fine blackcurrant fragrance that only adds to its charm. This showy ornamental sage is perfect for cottage garden borders and containers, or incorporated into bedding schemes for a vibrant summer display. Although perennial, this half hardy Salvia will appreciate some protection from winter weather. Height: 90cm (35"). Spread: 60cm (24"). More info
    • 5 salvia Postiplug plants

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 10 salvia Postiplug plants

    • Despatch:
    • SAVE £4.99  
    • £19.98 £14.99
    • Out of stock