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 42 products.
 

Astilbe x arendsii 'Look at Me'

False Goatsbeard

  • New in 2015
Turn any dark, damp corner of the garden into a focal point with this stunning Astilbe. The bubble-gum pink flower plumes and vivid ruby-red stems of Astilbe 'Look At me' virtually shout for your attention. This easy-grow perennial will thrive in soil too wet for many garden plants, but you don't have to tuck it out of site. This star perennial is also a top performer in patio pots when kept shaded and well watered. Voted Best New Plant when launched to the industry at the 2013 European Plantarium trade fair - we now have stock to meet consumer demand for this sought after perennial plant. Height: 45cm (18"). Spread: 50cm (20").
More info
    • 3 bare root astilbe plants

    • Despatch: By end of November 2015
    •  
    • £8.99
    • 6 bare root astilbe plants

    • Despatch: By end of November 2015
    •  
    • £14.99

Phlox Collection (Creeping)

Phlox subulata, Phlox douglasii, Moss Phlox

 Customer Rating
  • Fragrant ground cover
Delicate in appearance but tough in character, these spreading evergreen perennials soften the edges of paths and grow in dry rockeries or on sunny banks and slopes. Perfect for creating colourful, weed smothering, ground cover. Height: 15cm (6"). Spread: 50cm (20").
  • Collection comprises:
  • Phlox subulata 'Candy Stripes'
  • Phlox douglassi 'Red Admiral'
  • Phlox subulata 'Fort Hill'
  • Phlox subulata 'Scarlet Flame'
  • Phlox subulata 'Emerald Cushion Blue'
More info
    • 5 phlox Postiplug plants

    • Despatch: By end of October 2015
    •  
    • £11.99
    • 10 phlox Postiplug plants

    • Despatch: By end of October 2015
    • SAVE £5.99  
    • £23.98 £17.99

Trollius 'Dancing Flame'

Globeflower

  • New in 2015
Add some heat to your border this autumn with Trollius 'Dancing Flame'. This Globeflower has everything you'd want from a border perennial; contained vigour, long flowering habit, care-free attitude, and years of garden performance! The glorious orange blooms just keep on coming right though early summer for 8 weeks of vibrant colour. This hardy herbaceous perennial thrives in moist soils but will cope with drought conditions once established. Height: 60cm (24"). Spread: 50cm (20").
More info
    • 1 x 9cm potted trollius plant

    • Despatch: By end of September 2015
    •  
    • £11.99
    • 2 x 9cm potted trollius plants

    • Despatch: By end of September 2015
    •  
    • £17.99

Lupin 'Russell Hybrids Mixed'

Lupinus

Tall spires of tightly packed flowers rise above clumps of palmate foliage in a magical array of colours. This wonderful mix of the ever popular 'Russell Hybrids' is ideal for adding height and structure to the back of perennial borders and woodland edges. A distinctive hardy perennial that remains a cottage garden favourite. Height: 90cm (36"). Spread: 50cm (20"). More info
    • 3 x 5cm potted lupin plants

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 6 x 5cm potted lupin plants

    • Despatch: By end of September 2015
    • SAVE £6.99  
    • £19.98 £12.99

Lupin 'Russell Hybrids Mixed' (Large Plant)

Lupinus

Tall spires of tightly packed flowers rise above clumps of palmate foliage in a magical array of colours. This wonderful mix of the ever popular ‘Russell Hybrids' is ideal for adding height and structure to the back of perennial borders and woodland edges. A distinctive hardy perennial that remains a cottage garden favourite. Height: 90cm (36"). Spread: 50cm (20"). More info
    • 1 x 2 litre potted lupin plant

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

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

Poppy 'Royal Wedding' (Large Plant)

Papaver orientale, Oriental Poppy

The Oriental Poppy is perfect for cottage gardens, and are best planted together in clumps for the full effect. Poppy 'Royal Wedding' is the pick of the bunch, with glistening white petals and a dark centre to each bloom. Bees and butterflies love the nectar-rich flowers. Oriental Poppies are easy to grow, hardy perennial plants for a sunny border in the garden. Plants are clump-forming, tough and produce over-sized flowers in early summer each year, followed by attractive seedheads. Height: 60cm (24"). Spread: 50cm (20"). More info
    • 1 x 8cm potted poppy plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 8cm potted poppy plants

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

Geum 'Blazing Sunset'

Avens

 Customer Rating
Fully double, scarlet red Geum flowers rise above clumps of foliage on thin, wiry stems. Geum 'Blazing Sunset' adds a bright splash of colour to borders - the large flowers make a dazzling and unusual addition to cut flower arrangements too. These colourful hardy perennials are so easy to grow that we can't understand why they're not more commonly grown! Height and spread: 60cm (24").
More info
    • 6 geum plug plants

    • Despatch: By end of September 2015
    •  
    • £5.99

Salvia 'Amistad' (Large Plant)

Sage

Salvia 'Amistad' is an exceptionally beautiful new variety. Exquisite rich purple flowers are carried on tall, near-black stems above a mound of lush green foliage. With regular deadheading, this magnificent hardy perennial can bloom almost continuously from May right through to October, attracting a host of bees and butterflies throughout the season. Ornamental Sage has long been a stalwart of cottage garden borders, and this one is no exception. Perfect for exotic planting schemes and wildlife gardens too. Height: 120cm (48"). Spread: 50cm (20"). More info
    • 1 x 1 litre potted salvia plant

    • Despatch: By end of September 2015
    •  
    • £7.99
    • 1 x 2 litre potted salvia plant

    • Despatch: By end of September 2015
    •  
    • £11.99
    • 2 x 1 litre potted salvia plants

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

    • Despatch: By end of September 2015
    •  
    • £18.99

Echinacea purpurea 'Rubinstern' (Large Plant)

Coneflower

Cone Flowers are much loved by bees and butterflies when grown in the garden, so are a common choice for wildlife gardening. The clump-forming plants work well in cottage garden borders, and will flower for a long period. Echincea 'Rubinstern' is particularly recommended, thanks to its rich pink, daisy-like flowers, which can be up to 12cm (5") wide. Height: 90cm (36"). Spread 50cm (20").

More info
    • 1 x 1 litre potted echinacea plant

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

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

Giant Fragrant Cowslip

Primula florindae, Tibetan Cowslip

Stiff stems carry whorls of sulphur yellow, tubular, flowers with a delicate, sweet fragrance. Once established, Giant Cowslips will naturalise to form swathes of lush, mid green foliage that makes ideal groundcover for natural planting schemes. With an RHS AGM, Primula florindae makes a superb choice for a damp, shady corner where other plants won't grow. Height: 90cm (35"). Spread: 50cm (20").
More info
    • 3 fragrant cowslip jumbo plug plants

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 6 fragrant cowslip jumbo plug plants

    • Despatch: By end of September 2015
    •  
    • £17.99

Mimulus x cultorum 'Major Bees' (Large Plant)

Diplacus, Monkey Flower, Musk

Mimulus are low growing, bushy plants, which are easy to grow, producing many orchid-like flowers from early summer. They love a moist soil, and can cope with waterlogging and growing at the edge of ponds.

Monkey Flowers can be grown in borders or in patio containers, and will flower for longer in a shady corner. Mimulus 'Major Bees' is a distinctive cultivar with golden-yellow, spotted flowers. Height and spread: 50cm (20").

More info
    • 1 x 1 litre potted mimulus plant

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

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

Agapanthus 'Arctic Star' (Large Plant)

African Lily

Large umbels of white, trumpet shaped flowers make an elegant display in summer borders and patio containers. Agapanthus 'Arctic Star' blooms from July to September above clumps of linear grey-green, semi evergreen foliage. The sturdy, upright stems of this African Lily are ideal for cutting for summer bouquets. This hardy perennial is tough and resilient, forming superb, low maintenance ground cover when planted en masse. Height: 60cm (24"). Spread: 50cm (20"). More info
    • 1 x 3 litre potted agapanthus plant

    • Despatch: By end of September 2015
    •  
    • £17.99
    • 2 x 3 litre potted agapanthus plants

    • Despatch: By end of September 2015
    •  
    • £27.99