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 26 products.
 

Brunnera 'Alexander's Great'

Brunnera macrophylla

A statement large-leaved foliage plant for borders and large containers. This hardy perennial returns bigger and better each spring producing neat clumps of heavily silver-veined leaves for dramatic effect in the garden. Use Brunnera 'Alexander's Great' as an underplanting to trees and shrubs or add in with your favourite border perennials for a winning mixed display. Sprays of airy sky-blue flowers on wirey stems also appear in spring to create extra seasonal interest. This low maintenance perennial plant thrives in shade but will happily perform in sunny locations too. Use Brunnera 'Alexander's Great' in containers on the patio to add contrast to your favourite seasonal bedding plants. Height: 40cm (16"). Spread: 90cm (36"). More info
    • 2 brunnera jumbo plug plants

    • Despatch: By end of September 2016
    •  
    • £14.99
    • 4 brunnera jumbo plug plants

    • Despatch: By end of September 2016
    •  
    • £24.99

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 July 2016
    •  
    • £14.99
    • 3 alstroemeria jumbo plug plants

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

Euphorbia 'Ascot Rainbow'

Euphorbia x martini, Spurge

  • Ideal for difficult dry gardens
  • Year-round interest
  • Vivid spring flowerheads

It’s hard to convey the myriad of colour changes this showy foliage plant goes through each season. Here goes! The strap-like stripy leaves emerge with an intense pink flush, maturing to grey-green with yellow margins and red markings. The plants also take on a pink tinge during the coldest parts of winter. This is all topped off in spring with a display of billowing flowerheads in vivid shades of green, yellow, cream and red. Height and spread: 90cm (36").
More info
    • 1 euphorbia jumbo plug plant

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 3 euphorbia jumbo plug plants

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

Polemonium reptans 'Stairway to Heaven' (Large Plant)

Jacobs Ladder

An attractive cultivar of a cottage garden favourite. Clumps of delicate variegated foliage play host to stems of pretty light blue flowers in April and May. The cream edged leaves of Polemonium reptans 'Stairway to Heaven' are heat tolerant and develop a lovely pink tinge when grown in full sun. Jacobs Ladder is a versatile hardy perennial that needs little maintenance and makes a pleasing companion for Hostas in shadier positions. Height: 40cm (16"). Spread: 45cm (18").

 

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

    • Despatch:
    •  
    • £7.99
    • Out of stock
    • 2 x 1 litre potted polemonium plants

    • Despatch:
    •  
    • £12.99
    • Out of stock

Iris pallida 'Variegata' (Large Plant)

Iris pallida 'Aurea Variegata', Iris pallida 'Argentea Variegata', Bearded Iris

Iris pallida 'Variegata' gives interest all-year round and is truly spectacular. Even before the fragrant, lilac-blue flowers appear, your plants will be playing host to showy, cream-lined foliage. This is quite a collectable Iris, which is actually very easy to grow too!

Grow Iris pallida 'Variegata' in full sun for the very best and brightest leaf colours. These spectacular Bearded Iris plants are perfect for adding height and structure to the middle of borders, where it can really show off. An easy to grow perennial, which is ideal for beginners. Height: 120cm (48"). Spread: 40cm (16").

 

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

    • Despatch: By end of July 2016
    •  
    • £9.99
    • 2 x 1 litre potted Iris plants

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

Hosta 'So Sweet' (Large Plant)

Plantain Lily

A compact variegated variety forming neat clumps of glossy mid-green foliage with pale yellow margins. From July to August, the funnel shaped blooms appear on short stems above the foliage. As the name suggests, the lilac-white flowers of Hosta 'So Sweet' are deeply fragrant. A lovely choice for a prominent spot at the front of moist borders. Unlike some variegated forms, Hosta 'So Sweet' will tolerate some sun. Height: 35cm (14"). Spread: 55cm (22").

 

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

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

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

Hosta 'Wide Brim' (Large Plant)

Plantain Lily

A well known variety that holds an RHS AGM for its garden performance. Hosta 'Wide brim' has heavily puckered, variegated foliage with deep green centres and pale gold margins. Lilac blue, funnel shaped flowers appear on tall stems throughout July. This clump forming perennial has an attractive mounding habit that creates a dense, rounded plant over time. A popular choice for a shaded position. Height: 45cm (18"). Spread: 100cm (39").

 

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

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

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

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").

 

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

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

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

Ajuga reptans 'Rainbow' (Large Plant)

Ajuga reptans 'Multicolor', Bugle

Grown for its extraordinary foliage, Ajuga reptans 'Rainbow' forms a dense mat of multicoloured groundcover. The rounded leaves are streaked and spotted with bronze, yellow, pink and cream, brightening even the shadiest corner of the garden. In early summer, the blue flower spikes of Bugle attract bees and pollinating insects. This low growing evergreen perennial has a reputation for being tough and resilient, spreading through the front of borders, rockeries and woodland areas with ease. Height: 15cm (6"). Spread: 60cm (24").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 9cm potted ajuga plant

    • Despatch: By end of July 2016
    •  
    • £7.99
    • 2 x 9cm potted ajuga plants

    • Despatch: By end of July 2016
    •  
    • £11.99

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").

 

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

    • Despatch: By end of July 2016
    •  
    • £9.99
    • 2 x 2 litre potted hosta plants

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

Wallflower 'Variegatum' (Large Plant)

Erysimum linifolium, Cheiranthus

Perennial Wallflowers are essential for low-maintenance gardens, and they will flower twice a year, once during winter/spring, then again towards the end of the summer.

This variegated Wallflower produces the mauve, colour-changing flowers, set against evergreen cream-lined foliage. Grow Wallflower 'Variegatum' in borders, rockeries or mix with bedding plants for attractive, spring-flowering patio pots and windowboxes. Versatile and quite undemanding, this short-lived perennial is tough, will grow in the poorest of soils and is drought tolerant once established. Height and spread: 45cm (18").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 1.5 litre potted wallflower plant

    • Despatch: By end of July 2016
    •  
    • £9.99
    • 2 x 1.5 litre potted wallflower plants

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

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").

 

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

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

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