Thompson & Morgan

Important delivery notice
The products on this site are only delivered to UK addresses. If you require delivery to another country please visit one of our other sites below.

Refine Results

Refine by..

Email Newsletter

Sign up to our newsletter

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 65 products.
 

Phlox paniculata 'Peppermint Twist' (Large Plant)

Perennial Phlox

Delightfully dwarf, this perennial Phlox reaches just 45cm (18") tall! Charming pink and white pinwheel blooms will fill the air with the most exquisite fragrance. With its neat, bushy habit, Phlox paniculata 'Peppermint Twist' is perfect for patio containers - plant it next to a doorway where you can really appreciate their fragrance. Highly attractive to pollinating insects, this pretty variety will brighten up the front of borders, and also makes a pleasing cut flower. Height and spread: 45cm (18"). More info
    • 1 x 2 litre potted phlox plant

    • Despatch: By end of February 2016
    •  
    • £12.99
    • 2 x 2 litre potted phlox plants

    • Despatch: By end of February 2016
    • SAVE £5.99  
    • £25.98 £19.99

Cosmos atrosanguineus 'Eclipse'

Bidens atrosanguinea, Chocolate Plant

We've topped our chocolate cosmos offering with the richest scent and colour. Cosmos 'Eclipse' surpasses all previous introductions with a scent that is utterly divine, emanating from deeply rich maroon flowers that are so dark and sensual they appear almost black – certainly the darkest cosmos you'll find on the market. Cosmos 'Eclipse' is the must-have garden plant for all chocaholics out there, the rich scent will fill the garden on a calm sunny day - you'll think someone has unwrapped your favourite chocolate bar! These sturdy cosmos plants add luxury and scent to summer containers and seasonal bedding displays. If you are looking to get 'beach fit' for you summer holiday this year, Cosmos 'Eclipse' might not be for you - you'll be heading for the snack cupboard every time you walk past your plants! Height: 45cm (18"). Spread 30cm (12"). More info
    • 4 cosmos Postiplug plants

    • Despatch: By end of April 2016
    •  
    • £9.99
    • 8 cosmos Postiplug plants

    • Despatch: By end of April 2016
    • SAVE £1.99  
    • £19.98 £17.99

Meconopsis baileyi 'Alba'

Himalayan Poppy, Tibetan Poppy, Meconopsis betonicifolia

  • Glorious white Himalayan poppy
Rarely seen, this stunning white form of the Himalayan blue poppy is a real eye-catcher in late spring and early summer. Pure white, silky petals surround golden yellow stamens to form clear, single blooms up to 10cm (4") across. Forming a basal rosette of hairy leaves, Meconopsis baileyi 'Alba' thrives in cool, moist, shady borders and woodland gardens, making a stunning feature when planted en masse. This captivating short-lived perennial is a 'must have' in the garden! Height: 90cm (35"). Spread: 50cm (20").
More info
    • 2 meconopsis jumbo plug plants

    • Despatch: By end of April 2016
    •  
    • £12.99
    • 4 meconopsis jumbo plug plants

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

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 March 2016
    •  
    • £9.99
    • 2 x 2 litre potted lupin plants

    • Despatch: By end of March 2016
    • SAVE £2.99  
    • £19.98 £16.99

Geum 'Totally Tangerine' (Large Plant)

Avens

Gorgeous pale orange blooms rise above clumps of foliage on thin, wiry stems. This free-flowering Geum is a tough and reliable addition to perennial borders where it will bloom non-stop from early summer right through until early autumn. The warm orange blooms of Geum 'Totally Tangerine' also make fantastic cut flowers for a vase indoors. Height: 60cm (24"). Spread: 45cm (18"). More info
    • 1 x 1 litre potted geum plant

    • Despatch: By end of February 2016
    •  
    • £12.99
    • 2 x 1 litre potted geum plants

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

Meconopsis Duo

Himalayan Blue Poppy, Tibetan Poppy

These stunning Himalayan poppies are a 'must have' in the garden! Silky petals in shades of white or blue surround golden yellow stamens to form clear, single blooms up to 10cm (4") across. Forming a basal rosette of hairy leaves, Meconopsis makes a captivating feature planted en masse in woodland gardens and moist, shady borders.


  • Collection comprises 4 jumbo plugs each of:
  • Meconopsis 'Lingholm' - A captivating short-lived perennial bearing spectacular, single clear blue poppy flowers, up to 10cm (4") across. Incredibly popular, this Himalayan blue poppy is ideal for moist shady borders. Height: 75cm (30"). Spread: 50cm (20").
  • Meconopsis baileyi 'Alba' - Rarely seen, this stunning white form of the Himalayan blue poppy is a real eye-catcher in late spring and early summer. Although often short-lived, this Meconopsis makes a stunning feature when planted en masse. Height: 90cm (35"). Spread: 50cm (20").
More info
    • 8 meconopsis jumbo plugs - 4 of each variety

    • Despatch: By end of April 2016
    • SAVE £8.99  
    • £33.98 £24.99

Tricyrtis 'Mixed'

Tricyrtis formosana, Jewel Lily, Toad LIly

An unsung garden hero in our opinion. Tricyrtis thrives in damp shady corners where many other plants would struggle, rewarding you with laddering stems, bejewelled in speckled blooms in three different colours. Sometimes known as the Jewel Lily, or the less attractive Toad Lily, we're sure you'll fall in love with the beauty of this unusual hardy perennial. Height: 75cm (30"). Spread: 70cm (28"). More info
    • 3 bare root tricyrtis plants

    • Despatch: By end of February 2016
    •  
    • £9.99
    • 6 bare root tricyrtis plants

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

Meconopsis baileyi 'Hensol Violet'

Himalayan Blue Poppy, Tibetan Blue Poppy, Meconopsis betonicifolia

The 'must-have' Himalayan Blue Poppy' has a rival in this exquisite cultivated form. Bright violet-purple, almost shimmering flowers, with the merest hint of red, make a stunning addition planted in groups in shady borders and woodland areas. This 'collectors plant' still surprises countless poppy-lovers who have never seen this unusual perennial before. Meconopsis betonicifolia 'Hensol Violet' is so named for its origins from Hensol House, Scotland, where it was discovered by Lady Henderson. Height: 90cm (36"). Spread: 30cm (12"). More info
    • 1 x 9cm potted meconopsis plant

    • Despatch: By end of February 2016
    •  
    • £11.99
    • 2 x 9cm potted meconopsis plants

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

Tropaeolum speciosum

Flame Nasturtium, Flame Flower, Flame Creeper

Exotic, spurred blooms in bright, vermillion red appear throughout summer in a rich explosion of colour. The vibrant blooms are followed by spherical blue fruits set against a backdrop of attractive dark green foliage. Tropaeolum speciosum is an intriguing climbing perennial that prefers a cool, sheltered position. This sought after plant creates a spectacular sight when grown through mature shrubs or scrambling over low walls. Height: 3m (10'). Spread: 1.2m (4').
More info
    • 2 bare root tropaeolum speciosum plants

    • Despatch: By end of February 2016
    •  
    • £12.99
    • 4 bare root tropaeolum speciosum plants

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

Trollius 'Dancing Flame'

Globeflower

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 August 2016
    •  
    • £11.99
    • 2 x 9cm potted trollius plants

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

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 February 2016
    •  
    • £12.99
    • 2 x 2 litre potted phlox plants

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

Lupin 'Noble Maiden' (Large Plant)

Lupinus

No cottage garden would be complete without the well loved Lupin, and this one is stunning in its simplicity. Tall spires of snow white blooms rise above clumps of palmate foliage in early summer. Lupin 'Noble Maiden' makes a particularly effective choice for brightening dappled shade in woodlands, where its pale flowers appear luminescent. Height: 90cm (36"). Spread: 75cm (30"). More info
    • 1 x 2 litre potted lupinus plant

    • Despatch: By end of April 2016
    •  
    • £12.99
    • 2 x 2 litre potted lupinus plants

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