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 26 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

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 August 2015
    •  
    • £11.99
    • 2 x 9cm potted trollius plants

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

Hosta 'Fire and Ice' (Large Plant)

Plantain Lily

A spectacular Hosta with superb reverse variegation. Each leaf of Hosta 'Fire and Ice' has a pristine white centre with a deep green, wavy margin that creates a fabulous colour contrast. Lilac coloured blooms enhance the display throughout July. This striking variety holds an RHS AGM for its garden performance, and is particularly effective at brightening shaded borders. Height: 55cm (22"). Spread: 100cm (39"). More info
    • 1 x 2 litre potted hosta plant

    • Despatch: By end of May 2016
    •  
    • £13.99
    • 2 x 2 litre potted hosta plants

    • Despatch: By end of May 2016
    •  
    • £21.99

Golden Lysimachia

Lysimachia punctata, Dotted Loosestrife

  • A towering, elegant plant for the border
Bring some sunshine to your borders with this resilient cottage-garden favourite. Neat clumps of tall, elegant stems with striking yellow flowers are borne from mid-summer through until early autumn. Golden Lysimachia is great for difficult clay soils and shadier parts of the garden, thriving in damp borders, bog gardens or at the margins of a pond. Grow dotted loosestrife in woodland gardens or informal areas for a burst of late summer colour! Height: 90cm (35"). Spread: 60cm (24").
More info
    • 5 golden lysimachia Postiplug plants

    • Despatch: By end of August 2015
    •  
    • £9.99
    • 10 golden lysimachia Postiplug plants

    • Despatch: By end of August 2015
    • SAVE £4.99  
    • £19.98 £14.99

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 August 2015
    •  
    • £9.99
    • 2 x 1 litre potted mimulus plants

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

Iris ensata 'Collection'

Japanese Iris, Iris kaempferi

Spectacular, exotic blooms are carried above narrow, strap-like foliage in summer. Iris ensata enjoy a reliably moist soil and positively thrive in bog gardens or at the margins of a pond or stream. The long stems of these low maintenance perennials also make them ideal for cutting for an eye-catching vase indoors. Height: 90cm (36"). Spread: 30cm (12"). More info
    • 4 bare root Iris plants

    • Despatch: By end of January 2016
    •  
    • £13.99
    • 8 bare root Iris plants

    • Despatch: By end of January 2016
    • SAVE £8.99  
    • £27.98 £18.99

Gunnera manicata (Large Plant)

Chilean Rhubarb

Gunnera is the ‘big daddy' of the gardening world. The giant evergreen leaves can reach 1-2 metres across, and will add the wow factor to any garden, although isn't necessarily suitable for smaller gardens!

Also affectionately known as Giant Rhubarb, Gunnera is robust, spectacular and architectural. They make great specimen plants bog gardens and waterlogged spots, the reflection in water is especially beautiful. Gunnera manicata holds an RHS Award of Garden Merit too. Height: 2.5m (8') Spread: 4m (13').

More info
    • 1 x 1 litre potted gunnera plant

    • Despatch: By end of October 2015
    •  
    • £9.99
    • 2 x 1 litre potted gunnera plants

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

Hosta fortunei 'Albomarginata' (Large Plant)

Plantain Lily

Hosta are one of the best shade-loving plants, thriving in moist, damp, dark areas, but also coping well with dry shade. The bold, colourful foliage is robust and weatherproof. Plants are quick-growing, clump-forming and are maintenance-free.

Hosta fortunei ‘Albomarginata' has particularly eye-catching leaves, which are ribbed, puckered and in edged in creamy-white. During the height of summer, a surprise display of showy, sometimes fragrant, flowers. Height: 55cm (22"). Spread: 100cm (39").

More info
    • 1 x 2 litre potted hosta plant

    • Despatch: By end of August 2015
    •  
    • £9.99
    • 2 x 2 litre potted hosta plants

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

Astilbe japonica 'Washington' (Large Plant)

False Goatsbeard

Astilbe are long-lived perennials, which are excellent for moist, shady corners in sun or dappled shade. 'Washington' is a particularly choice Astilbe, with pure white plumes, which appear from early summer. Plants are very rabbit resistant, and attractive to a range of different butterflies.

Astilbe are an excellent plant for cottage garden borders, or can be grown in containers for summer colour. Ensure soil is moist at all times. Height: and Spread: 50cm (19").

More info
    • 1 x 1 litre potted astilbe plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 1 x 3.5 litre potted astilbe plant

    • Despatch: By end of August 2015
    •  
    • £12.99
    • 2 x 1 litre potted astilbe plants

    • Despatch:
    •  
    • £16.99
    • Out of stock
    • 2 x 3.5 litre potted astilbe plants

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

Hosta fortunei var. aureomarginata (Large Plant)

Plantain Lily

Hostas are very useful shade-loving plants, which can thrive in moist, damp, dark borders, or difficult, dry shady borders. Plants are quick-growing, clump-forming and the bold leaves are colourful, robust and weatherproof.

Hosta fortunei ‘Aureomarginata' has ribbed leaves, in pure green and edged in golden-yellow. During the summer, purple, bell-shaped flowers appear on showy, 90cm (36") stems. Excellent ground cover for shady borders. Height: 55cm (22"). Spread: 100cm (39").

More info
    • 1 x 2 litre potted hosta plant

    • Despatch: By end of August 2015
    •  
    • £9.99
    • 2 x 2 litre potted hosta plants

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

Hosta 'Great Expectations' (Large Plant)

Plantain Lily

A lovely cultivar with thick, variegated leaves that have a naturally stiff habit. The heart shaped foliage is yellow, fading to white towards the centre of each leaf, with irregular blue green margins. From June to July, Hosta 'Great Expectations' produces white, bell shaped flowers above the foliage. Although slow growing, this superb variety is well worth the wait and proves to be reasonably slug resistant. Height: 70cm (27"). Spread: 120cm (48"). More info
    • 1 x 2 litre potted hosta plant

    • Despatch: By end of August 2015
    •  
    • £13.99
    • 2 x 2 litre potted hosta plants

    • Despatch: By end of August 2015
    •  
    • £21.99

Hosta 'Francee' (Large Plant)

Hosta fortunei, Plantain Lily

Hosta ‘Francee' is a tough, weatherproof variety with foliage that is deeply ribbed and edged in jagged, cream margins. When protected from slugs, this vigorous hardy plant will quickly form clumps of foliage that can light up a shady spot.

In mid summer, this RHS Award of Garden Merit variety produces attractive flower spikes that stand above the foliage. Hostas are recommended for borders, woodland gardens and patio pots, thriving in shade. Height: 55cm (22"). Spread: 100cm (39").

More info
    • 1 x 2 litre potted hosta plant

    • Despatch: By end of August 2015
    •  
    • £9.99
    • 2 x 2 litre potted hosta plants

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