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 21 products.
 

Penstemon 'Pensham Trio'

Phenomenal stamina and indifference to rain and drought means that this trio of penstemon will flower each year for an incredible five months. Mesmerising bells with satiny white throats are carried above semi evergreen foliage. These popular hardy perennials deserve prime spots in the garden or on the patio where they can really show off. Pensham penstemons also boast slug resistance and semi-evergreen foliage, giving an all round winning performance for many years. Height: 90cm (36"). Spread: 45cm (18"). Collection comprises 3 each of Penstemon Laura (bottom left), Penstemon Czar (top) and Penstemon Amelia Jayne (bottom right).
More info
    • 9 penstemon Postiplug plants - 3 of each variety

    • Despatch: By end of September 2015
    • SAVE £9.98  
    • £29.97 £19.99

Penstemon 'Laura'

Phenomenal stamina and indifference to rain and drought means that Penstemon 'Laura' will flower each year for an incredible five months. Mesmerising, pink bells with satiny white throats are carried above semi evergreen foliage. These popular hardy perennials deserve prime spots in the garden or on the patio where they can really show off. Pensham penstemons also boast slug resistance and semi-evergreen foliage, giving an all round winning performance for many years. Height: 90cm (36"). Spread: 45cm (18").
More info
    • 3 penstemon Postiplug plants

    • Despatch: By end of September 2015
    •  
    • £9.99

Penstemon 'Amelia Jayne'

Phenomenal stamina and indifference to rain and drought means that Penstemon 'Amelia Jayne' will flower each year for an incredible five months. Mesmerising, red bells with satiny white throats are carried above semi evergreen foliage. These popular hardy perennials deserve prime spots in the garden or on the patio where they can really show off. Pensham penstemons also boast slug resistance and semi-evergreen foliage, giving an all round winning performance for many years. Height: 90cm (36"). Spread: 45cm (18").
More info
    • 3 penstemon Postiplug plants

    • Despatch: By end of September 2015
    •  
    • £9.99

Penstemon 'Czar'

  • Customer favourite
Phenomenal stamina and indifference to rain and drought means that Penstemon 'Czar' will flower each year for an incredible five months. Mesmerising, lilac bells with satiny white throats are carried above semi evergreen foliage. These popular hardy perennials deserve prime spots in the garden or on the patio where they can really show off. Pensham penstemons also boast slug resistance and semi-evergreen foliage, giving an all round winning performance for many years. Height: 90cm (36"). Spread: 45cm (18").
More info
    • 3 penstemon Postiplug plants

    • Despatch: By end of September 2015
    •  
    • £9.99

Penstemon 'Appleblossom' (Large Plant)

This pretty little Penstemon bears pale pink, tubular flowers with white throats, above glossy, narrow foliage. Penstemon 'Appleblossom' is semi-evergreen, with a neat, bushy habit that sits nicely towards the front of perennial borders. This popular variety is easy to grow and holds an RHS AGM for its superb garden performance. Height and spread: 60cm (24"). More info
    • 1 x 1 litre potted penstemon plant

    • Despatch: By end of May 2016
    •  
    • £9.99
    • 1 x 2 litre potted penstemon plant

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 2 x 1 litre potted penstemon plants

    • Despatch: By end of May 2016
    •  
    • £14.99
    • 2 x 2 litre potted penstemon plants

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

Penstemon 'Garnet' (Large Plant)

Penstemon 'Andenken an Friedrich Hahn'

Often sold as Penstemon 'Andenken an Friedrich Hahn', it’s catchier name of Penstemon ‘Garnet’ seems far more descriptive. Deep wine-red, bell-shaped flowers fill the upright stems above a clump of narrow-leaved foliage. Penstemon ‘Garnet’ is a vigorous variety which makes quite an impact in perennial gardens and exotic, hot coloured borders, and like all Penstemons, is popular with pollinating insects. Height: 75cm (30”). Spread: 60cm (24”). More info
    • 1 x 1 litre potted penstemon plant

    • Despatch: By end of May 2016
    •  
    • £9.99
    • 1 x 2 litre potted penstemon plant

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 2 x 1 litre potted penstemon plants

    • Despatch: By end of May 2016
    •  
    • £14.99
    • 2 x 2 litre potted penstemon plants

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

Penstemon 'Pensham Wedding Day' (Large Plant)

Ivory white bells crowd the upright stems of Penstemon 'Pensham Wedding Day’ above a neat clump of narrow semi-evergreen foliage. Brimming with understated elegance, this hardy perennial blends effortlessly into herbaceous borders. Like all of the Pensham Penstemons, this cultivar has been bred to withstand lower temperatures and inclement weather, making it perfect for UK summers. It has staying power too – flowering continuously from early summer through to October. Height: 75cm (30"). Spread: 60cm (24"). More info
    • 1 x 1 litre potted penstemon plant

    • Despatch: By end of May 2016
    •  
    • £9.99
    • 1 x 2 litre potted penstemon plant

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 2 x 1 litre potted penstemon plants

    • Despatch: By end of May 2016
    •  
    • £14.99
    • 2 x 2 litre potted penstemon plants

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

Penstemon 'Raven' (Large Plant)

Sumptuous, tubular, blackcurrant blooms rise in elegant spikes above clumps of narrow foliage for literally months on end. Penstemon ‘Raven’ is a striking cultivar, particularly when teamed with pale flowered perennials such as anthemis and gypsophila. Like all penstemon it is a magnet for pollinating insects earning it a place in wildlife areas too. This semi evergreen perennial is easy to grow and holds an RHS AGM for its garden performance. Height: 90cm (36"). Spread: 30cm (12"). More info
    • 1 x 1 litre potted penstemon plant

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

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 2 x 1 litre potted penstemon plants

    • Despatch: By end of September 2015
    •  
    • £14.99
    • 2 x 2 litre potted penstemon plants

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

Penstemon 'Sour Grapes' (Large Plant)

Its unusual colouring makes Penstemon 'Sour Grapes' instantly recognisable. This well loved variety bears upright spikes of alluring bell-shaped flowers in a peculiar blend of pink and blue, being neither one nor the other. This hardy semi-evergreen perennial is easy to grow, blooming over an exceptionally long period. Penstemons make a colourful contribution to herbaceous borders and wildlife areas where they will attract bees and other pollinators throughout the summer. Height: 60cm (24”). Spread: 45cm (18”). More info
    • 1 x 1 litre potted penstemon plant

    • Despatch: By end of May 2016
    •  
    • £9.99
    • 1 x 2 litre potted penstemon plant

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 2 x 1 litre potted penstemon plants

    • Despatch: By end of May 2016
    •  
    • £14.99
    • 2 x 2 litre potted penstemon plants

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

Phlox paniculata 'David' (Large Plant)

Perennial Phlox

Phlox paniculata 'David' is a well known variety that deservedly holds an RHS AGM. This handsome perennial Phlox bears large panicles of elegant white blooms with a simply heavenly fragrance. This vigorous variety puts on strong growth that will quickly form a pleasing clump in moist, sunny borders. A cottage garden favourite, it is loved by pollinating insects and makes a useful choice for wildlife gardens. Equally popular with flower arrangers for a lovely addition to summer bouquets. Height: 80cm (32"). Spread: 75cm (30"). More info
    • 1 x 2 litre potted phlox plant

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

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

Rudbeckia fulgida var. sullivantii 'Goldsturm' (Large Plant)

Coneflower

An RHS AGM winning Black Eyed Susan bearing bright, golden-yellow, daisy-like flowers with dark button eyes that make excellent cut flowers. The radiant, coneflowers of Rudbeckia fulgida ‘Goldsturm’ are produced over a long period, attracting bees and butterflies to their long lasting blooms. These compact perennials are easy to grow, reliably filling gaps in borders, and returning year after year. Height: 60cm (24"). Spread: 60cm (24"). More info
    • 1 x 1 litre potted rudbeckia plant

    • Despatch: By end of May 2016
    •  
    • £9.99
    • 1 x 3 litre potted rudbeckia plant

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 2 x 1 litre potted rudbeckia plants

    • Despatch: By end of May 2016
    •  
    • £14.99
    • 2 x 3 litre potted rudbeckia plants

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

Penstemon 'Etna' (Large Plant)

Part of the ‘Volcano’ series, Penstemon ‘Etna’ bears bell-shaped crimson-pink flowers with streaked, white throats. The upright stems are clothed in narrow, green foliage, remaining semi-evergreen in sheltered locations. This eye-catching hardy perennial has a neat, bushy habit that works well towards the front of borders. Height and spread: 60cm (24"). More info
    • 1 x 1 litre potted penstemon plant

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

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