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 31 products.
 

Pachysandra terminalis 'Green Carpet' (Large Plant)

Pachysandra terminalis 'Green Carpet' is an excellent plant for creating a carpet of green beneath trees and shrubs. Plants are mat-forming, and excellent at stopping weeds from taking hold. The evergreen foliage is textured, decorative and plays host to spikes of misty white flowers from early summer.

Easy to grow ground cover for awkward, shady borders, Pachysandra is the perfect choice for low-maintenance gardening. Plants stay low at just 15cm (6") and are ideal for small, oddly-shaped areas, edgings or patio containers. Height: 15cm (6"). Spread: up to 1m (39").

 

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

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 9cm potted pachysandra plants

    • Despatch:
    •  
    • £16.99
    • Out of stock

Geranium 'Rozanne'

Geranium 'Gerwat', Hardy Geranium, Cranesbill

  • Winner of The RHS Chelsea Flower Show 'Plant of the Centenary'
  • Unique long-flowering period for a Hardy Geranium

A celebrated Cranesbill producing masses of saucer shaped, violet-blue blooms with dainty white centres. Being a sterile hybrid, Geranium 'Rozanne' flowers repeatedly throughout the summer and won’t self-seed like other Geraniums. This hardy perennial makes excellent ground cover through the front of informal borders or spilling from containers. As summer ends the loose mounds of foliage colour to reddish brown and fiery orange for an extended display into autumn. Height: 30cm (12"). Spread: 60cm (24").


Useful links:

Geranium 'Rozanne gets our vote for RHS 'Plant of the Centenary'

 

More info
    • 1 geranium jumbo plug plant

    • Despatch: By end of October 2016
    •  
    • £9.99
    • 3 geranium jumbo plug plants

    • Despatch: By end of October 2016
    • SAVE *£9.98  
    • £29.97 £19.99

Erigeron glaucus 'Sea Breeze' (Large Plant)

Fleabane

A low-growing, carpeting plant for coastal locations, or any difficult, exposed position in the garden. The lilac blooms come easily, and the Beach Aster or Fleabane as it is commonly known, looks great tumbling over a rock wall, or growing between cracks in paving.

Erigeron plants are tough and easy to establish, some may even refer to them as 'foolproof'. The Beach Aster is long-lived too, will flower right through the summer, and self-seed if you'd like it to! Height: 30cm (12"). Spread: 45cm (18").

 

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

    • Despatch: Within 28 days
    •  
    • £9.99
    • 2 x 1 litre potted erigeron plants

    • Despatch: Within 28 days
    •  
    • £16.99

Erigeron 'Stallone'

This excellent ground cover plant is perfect for combating weeds in your borders. Use these fast growing perennial plants to smother border weeds and soften the edges of your planting areas. Each plant produces a dense mass of lovely two-toned daisy flowers that open white and slowly turn to pink and purple as they age. Perfect for drift planting or use as a gap filler around taller structural plants in your border. Also performs well as a cascading rockery plant. Height: 30cm (12"). Spread: 100cm (39"). More info
    • 6 erigeron plug plants

    • Despatch: By end of October 2016
    •  
    • £5.99

Geranium cinereum 'Jolly Jewel Collection'

Hardy Geranium, Cranesbill

  • Create a carpet of colour
  • Weed-suppressing Hardy Geraniums
  • Long flowering season

The dense foliage on these mat-forming plants is ideal for carpeting difficult dry, sunny banks or filling space in borders and rockeries. Plants hug the ground, meaning the weeds don't even get a look in! These long-lived hardy Geraniums are tough and last for years. The 'Jolly Jewel' series boasts a fruity selection of colours all with attractive veining to the petals and a darker centre to each bloom they barely rest their flower power from spring to late summer. Hardy Geraniums are great low maintenance plants and can also be grown in patio containers for long lasting displays. Height: 25cm (10"). Spread: 30cm (12").
More info
    • 3 x 9cm potted geranium plants

    • Despatch:
    •  
    • £19.99
    • Out of stock
    • 6 x 9cm potted geranium plants

    • Despatch:
    •  
    • £29.99
    • Out of stock

Brunnera 'Alexander's Great'

Brunnera macrophylla, Siberian Bugloss

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 October 2016
    •  
    • £14.99
    • 4 brunnera jumbo plug plants

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

Hardy Geranium 'Foundlings Friend'

Hardy Geranium, Cranesbill

  • Unique flower patterning
  • Easy to grow
  • Performs no matter the weather

Tough as old boots, hardy Geraniums should be high on everyone's planting list. Discovered as a chance seedling, Geranium 'Foundling's Friend' is a stand out variety, offering the most unusual flowers among the species. Violet-blue petals are delicately patterned with deep-purple veining. This compact form will thrive in sunny borders, coping with periods of drought once established. Height and spread: 30cm (12").
More info
    • 1 geranium jumbo plug plant

    • Despatch: By end of October 2016
    •  
    • £9.99
    • 3 geranium jumbo plug plants

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

Brunnera macrophylla 'Jack Frost' (Large Plant)

Siberian Bugloss

Grown for it's large, heart shaped, silver leaves with a sparkling metallic sheen that will brighten the shadiest borders. In Spring, the neat clumps of foliage are complemented by delicate sprays of sky blue flowers. Brunnera macrophylla 'Jack Frost' is a resilient, quick growing hardy perennial, making useful ground cover in those tricky shady areas. Try planting this Siberian Bugloss among hardy ferns for a woodland feel or throughout the front of cottage garden borders. Height: 45cm (18"). Spread: 60cm (24").

 

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

    • Despatch: Within 28 days
    •  
    • £12.99
    • 2 x 2 litre potted brunnera plants

    • Despatch: Within 28 days
    •  
    • £19.99

Hypericum calycinum (Large Plant)

St. John's Wort, Rose of Sharon

Rose of Sharon is a well-known shrub up and down the UK, thanks to its low-growing, ground covering habit, needing virtually no maintenance. Once established, Hypericum calycinum will grow almost anywhere from fertile, moist soil to poor, dry conditions, plants will even thrive in deep shade! The large, daffodil-yellow flowers of Rose of Sharon carry a central powder-puff of anthers from summer to autumn. Hypericum is a versatile shrub, which makes excellent spreading, landscape-style ground cover for borders and woodland areas. Plants can also be trimmed into an attractive low hedge. Height: 60cm (24"). Spread: 150cm (59").

 

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

    • Despatch: Within 28 days
    •  
    • £9.99
    • 2 x 1 litre potted hypericum plants

    • Despatch: Within 28 days
    •  
    • £14.99

Veronica spicata 'Royal Candles' (Large Plant)

Speedwell

Veronica 'Royal Candles' produces an endless supply of upright flower spikes in a deep shade of indigo blue. With a spreading habit it will quickly form a dense mat of toothed, mid green foliage that makes superb groundcover. This low growing perennial makes a lovely feature at the front of a well drained border, where it will spill over to soften edges and add a splash of summer colour. Height and spread: 30cm (12").

 

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

    • Despatch: Within 28 days
    •  
    • £7.99
    • 2 x 1 litre potted veronica plants

    • Despatch: Within 28 days
    •  
    • £12.99

Creeping Thyme (Large Plant)

Thymus serpyllum

One of the most useful kitchen herbs, this aromatic, evergreen creeping thyme will grow almost anywhere in containers, rock gardens, and even in cracks between paving. Ideal for creating low, carpets of groundcover that will attract bees to the tiny, pink blooms. Thyme is particularly useful in coastal areas where it copes well with winds and dry conditions. Height: 20cm (8"). Spread: 45cm (18").

 

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

    • Despatch: Within 28 days
    •  
    • £9.99
    • 2 x 1 litre potted thymus plants

    • Despatch: Within 28 days
    •  
    • £14.99

Gentiana scabra 'Royal Stripes'

  • Unique striped blooms
You'll be familiar with blue flowering gentian plants and you've likely seen white flowered forms, but you'll be blown away by the blue and white striped flowers of Gentiana 'Royal Stripes'. This rare new variety really brings a wow factor to the genus. Look closer at the impressive blooms and you'll also see vibrant green freckling standing out on a white canvas. Whether you use these compact herbaceous perennial plants in patio pots, borders or rockery displays, the carpet of colour is sure to attract attention from friends and family as well as bees and other pollinators. In return of a little deadheading, flowers will just keep on coming from early June through to October. Ideal for dappled shade, try Gentiana 'Royal Stripes' under trees and shrubs for a vibrant lift to your beds and borders. Height and spread: 25cm (10")
More info
    • 1 x 10.5cm potted gentiana plant

    • Despatch: By end of October 2016
    •  
    • £14.99
    • 2 x 10.5cm potted gentiana plants

    • Despatch: By end of October 2016
    • SAVE *£4.99  
    • £29.98 £24.99