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 34 products.
 

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

Berkheya purpurea

Purple Sunflower, South African Thistle

  • The thistle that thinks it's a sunflower!
  • Unusual border flower
  • Excellent dried cut flower

Nicknamed the 'purple sunflower', this shining beauty makes a fantastic border plant, producing a neat, ground-hugging rosette of thistle-like foliage and a striking flower stem that demands attention in any planting display. The gently prickled leaves make it a good plant to discourage pets and other unwanted visitors away from your prized borders!

Like many other South African species, Berkheya plants are very undemanding, simply requiring a sunny spot on free draining soil. Multiple flowers appear in late summer in a silvery shade of soft violet, creating a real wow factor. The stems make unusual fresh or dried cutflowers. Best planted under a south-facing wall and given some winter frost protection in colder parts of the UK. Height: 75cm (30"). Spread: 50cm (20").

More info
    • 5 x berkheya Postiplugs plants

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 10 x berkheya Postiplugs plants

    • Despatch: By end of August 2016
    • SAVE* £4.99  
    • £19.98 £14.99
    • 20 x berkheya Postiplugs plants

    • Despatch: By end of August 2016
    • SAVE* £19.97  
    • £30.96 £19.99

Delphinium 'New Millennium Dwarf Mixed'

We source our delphinium stocks from the best breeder in the world to guarantee top performance from our plants in your garden. The towering flower spires that make delphiniums a must-have garden perennial, can require sturdy staking to prevent them flopping under wind and rain. We're looking to change that with Delphinium 'New Millennium Juniors Mixed'. The sturdy upright stems don't need any staking or support, but give the same cottage garden feel as traditional varieties. From the world famous breeding of Terry Dowdeswell in New Zealand, these shorter, sturdier plants have been bred to perfection, with clear colours, evenly spaced florets, long flowering and high disease resistance. Height: 75cm (30"). Spread: 60cm (24").
More info
    • 5 delphinium postiplug plants

    • Despatch: By end of July 2016
    •  
    • £12.99
    • 10 delphinium postiplug plants

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

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").

 

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

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

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

Sedum 'Matrona' (Large Plant)

Sedum telephium

Sedum will attract butterflies to the garden in their droves. Sedum plants are long-lasting, hardy and drought tolerant. Sedum 'Matrona' forms a clump of foliage, with a unique bronze tinge, contrasting beautifully with its pink autumn blooms.

Sedum will thrive in hot, sunny borders, and are ideal for beginners. Their autumn flowering period is welcomed, bringing new colour to the garden as summer bedding dipslays fade away! Height: 75cm (30"). Spread: 30cm (12").

 

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

    • Despatch: By end of July 2016
    •  
    • £10.99
    • 2 x 3.5 litre potted sedum plants

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

Meconopsis grandis 'Lingholm' (Large Plant)

Himalayan Blue Poppy

This captivating short lived perennial is a 'must have'! From basal rosettes of hairy leaves rise tall stems bearing spectacular, single clear blue poppy flowers, up to 10cm (4") across. Meconopsis 'Lingholm' makes a stunning feature planted en masse in woodlands, and moist, shady borders. Height: 75cm (30"). Spread: 50cm (20").

 

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

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

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

Alstroemeria 'Rock 'n' Roll'

Peruvian Lily

  • Flowers until November
Ten years of breeding by Australia's leading specialists have produced this unusual new Alstromeria with amazing variegated foliage. This fantastic Peruvian Lily grows just as well in sun as in shade, with no burning of the creamy foliage. Alstroemeria 'Rock 'n' Roll' is super hardy, withstanding temperatures down to -10°C (14F). Perfect for borders and patios where it will flower continuously throughout summer, producing beautiful stems that are ideal for cutting. Height: 75cm (30"). Spread: 60cm (24").
More info
    • 1 alstroemeria jumbo plug plant

    • Despatch: By end of August 2016
    •  
    • £14.99
    • 3 alstroemeria jumbo plug plants

    • Despatch: By end of August 2016
    • SAVE *£19.98  
    • £44.97 £24.99

Campanula 'Iridescent Bells'

Bellflower

Bellflowers can sometimes flower and fade all too quickly, but Campanula 'Iridescent Bells' really is quite different! This new, repeat-flowering variety will bring four months of colour to the garden from June through September - a constant mix of silky deep purple buds and mature blooms of silvery-white bells, flushed with palest purple. Don't miss the opportunity to be among the first to grow this unique perennial which will make a focal point in a container display or border planting. Height and spread: 60cm (24").
More info
    • 3 campanula jumbo plug plants

    • Despatch: By end of September 2016
    •  
    • £14.99
    • 6 campanula jumbo plug plants

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

Penstemon 'Blackberry'

Satin, bell-shaped flowers in a rich shade of purple smother the upright stems of this hardy perennial. From June onwards, the long-lasting flowers are produced above glossy, semi-evergreen foliage and continue their display well into autumn, long after most other summer perennials have faded. Penstemon 'Blackberry' is undemanding and easy to grow, tolerating almost any position in the garden, regardless of rain or drought, and even resisting slug damage! Height: 75cm (30"). Spread: 40cm (16").
More info
    • 3 penstemon jumbo plug plants

    • Despatch: By end of September 2016
    •  
    • £9.99

Poppy 'Fruit Punch' (Large Plant)

Papaver orientale, Oriental Poppy

This T&M bred mix of Oriental Poppy bears enchanting, silky, ruffled blooms which stand above dark green clumps of foliage. A captivating blend of red, hot pink, bright orange and plum, with each bloom hosting a distinctive deep black centre. The fading blooms give way to an attractive display of large pepper pot seedheads which prolong its season of interest. Poppy 'Fruit Punch' makes a memorable display in borders, attracting attention from pollinating insects and florists in equal measure! Height: 75cm (30"). Spread: 50cm (20").

 

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

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

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

Penstemon 'Kilimanjaro' (Large Plant)

Part of the volcano series, Penstemon' Kilimanjaro' bears its pink blooms continuously from June right through to October. This semi-evergreen perennial has a neat upright habit making it a well behaved specimen for perennial borders. Try it in wildlife areas too - pollinating insects love its nectar rich blooms. Height: 75cm (30"). Spread: 45cm (18").

 

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

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

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

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").

 

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

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

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