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 654 products.
 

Phlox 'Bavaria'

Creeping Phlox are useful for dry, sunny spots and parched ground where other plants just won't grow! Once established, Phlox 'Bavaria' will thrive in the driest of soils, producing an impenetrable mat of fragrant flowers, suppressing weeds and resisting drought! The detailed eye on each gleaming white flower sets this stunning, evergreen drought tolerant perennial apart from the crowd. Height: 15cm (6"). Spread: 50cm (20"). More info
    • 5 phlox jumbo plug plants

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 10 phlox jumbo plug plants

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

Aquilegia 'Swan Mixed'

Columbine, Granny's Bonnet

A lovely mix of colourful columbines, producing an abundance of large flowers on upright, multi-branched stems. Aquilegia 'Swan Mixed' are longer flowering than many aquilegias, and left to naturalise, they will quickly fill your garden with drifts of spring colour. Perfect for cottage gardens, perennial borders and woodland gardens. Height: 30cm (12"). Spread: 25cm (10"). More info
    • 6 aquilegia plug plants

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

Wallflower 'Dwarf Scented Mixed'

Erysimum, Cheiranthus

Sometimes the old methods are the best, and that's exactly why we've added good, old fashioned bareroot wallflower plants to our range. Wallflower 'Dwarf scented Mixed' can be planted straight out into beds, containers and borders to create a fantastic tapestry of scented colour in the following spring. Tough, compact and reliable - this short lived perennial is tough enough to cope in even the poorest of soils. Height: 40cm (16"). Spread: 30cm (12"). More info
    • 20 bare root wallflower plants

    • Despatch: By end of October 2016
    •  
    • £7.99
    • 40 bare root wallflower plants

    • Despatch: By end of October 2016
    •  
    • £12.99

Astilbe x arendsii 'Look at Me'

False Goatsbeard

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 2016
    •  
    • £9.99
    • 6 bare root astilbe plants

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

Wallflower 'Sugar Rush' (Garden Ready)

Erysimum, Cheiranthus

  • The fast-track to a hassle-free garden - just plant, water and enjoy!
  • Quality plants delivered to your door, hardened off and ready to plant out
  • Fully-grown, super-robust, healthy plants
Our garden ready plants are selected for garden performance, straight from the nursery. We send them to you 'green' ahead of flowering (but please note some varieties may show a few blooms), which means plants will establish quickly and all their energy goes into producing better roots, so they produce more flowers throughout the season.

Winner in the 'Best New Bedding Plant' category at the Grower of the Year Awards 2013, this is one of the most exciting wallflowers to emerge in recent years. Dense, fragrant flower spikes in shades of cream, yellow, red and purple appear not only in the spring, but throughout the autumn too, blooming in just 6 weeks from an August planting! With a delightful sweet fragrance and compact, multi-branching habit, Wallflower 'Sugar Rush' is perfect for beds, borders, containers and window boxes, creating a mass of colour and scent when much of the garden is dormant. Versatile and undemanding, wallflowers are tough enough to cope in even the poorest soils. Height and spread: 30cm (12").

 

Garden ready special offer
More info
    • 30 wallflower garden ready plants

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

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

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: By end of July 2016
    •  
    • £7.99
    • 2 x 1 litre potted polemonium plants

    • Despatch: By end of July 2016
    •  
    • £12.99

Agapanthus 'Twister'

African Blue Lily

Here's a plant that will stand out from the crowd in your garden - the first ever deciduous bicolour Agapanthus. This African lily is robust, and truly hardy in the UK meaning it's perfect in the garden border as well as in a patio container. The flowers of Agapanthus 'Twister' are absolutely glorious, with crystal white flutes turning inky blue at the tips. The huge globes of colour appear from mid to late summer, hosted on strong, sturdy stems that need no staking. Height: 60cm (24"). Spread: 50cm (20").

 

Agapanthus Range
More info
    • 1 x 9cm potted agapanthus plant

    • Despatch: By end of September 2016
    •  
    • £13.99
    • 2 x 9cm potted agapanthus plants

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

Delphinium 'Pacific Giants'

 Customer Rating
A distinguished delphinium producing strong spikes of semi-double blooms in a dreamy blend of pink, lilac, purple, violet-blue, sky-blue and white. Delphinium 'Pacific Giants' are excellent for cutting and add structure and presence to the back of cottage garden perennial borders. Height: 150cm (60"). Spread: 75cm (30").
More info
    • 6 delphinium plug plants

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

Hollyhock 'Nigra' (Large Plant)

Alcea rosea

Superbly dramatic; the tall spires of Hollyhock 'Nigra' bear dark maroon-black flowers with pale contrasting eyes. This impressive variety of an old garden favourite is sure to draw attention for its stature and colour. Try growing it alongside paler varieties for a really striking contrast. These hardy perennials make a beautiful cut flower for a vase indoors too. Height: 200cm (79"). Spread: 60cm (24").,

Culinary note: try crystallising the flowers for a tasty cake decoration, or use them to make a delicately flavoured syrup to use with puddings. For more details about edible flowers click here.

 

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

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 2 x 1 litre potted hollyhock plants

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

Phlox paniculata 'Laura' (Large Plant)

Phlox paniculata 'Laura' is a particularly fine variety with a long flowering period and good resistance to mildew. This magnificent perennial produces panicles of lilac purple flowers with starry white centres all summer long. The tall stems make superb cut flowers that will fragrance bouquets with their rich, heady scent. This clump forming perennial Phlox is perfect for cottage garden borders where its blooms will attract attention from pollinating insects. Height and spread: 90cm (36").,

Culinary note: Some parts of these flowers are edible. Add the small flowers to fruit salads or crystallise them for decorating desserts. For more details about edible flowers click here.

 

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

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

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

Berkheya purpurea

Purple Sunflower, South African Thistle

  • The thistle that thinks it's a sunflower!
  • Unusual border flower
  • Excellent dried cut flower

Nicknamed the 'purple sunflower', this shining beauty makes a fantastic border plant, producing a neat, ground-hugging rosette of thistle-like foliage and a striking flower stem that demands attention in any planting display. The gently prickled leaves make it a good plant to discourage pets and other unwanted visitors away from your prized borders!

Like many other South African species, Berkheya plants are very undemanding, simply requiring a sunny spot on free draining soil. Multiple flowers appear in late summer in a silvery shade of soft violet, creating a real wow factor. The stems make unusual fresh or dried cutflowers. Best planted under a south-facing wall and given some winter frost protection in colder parts of the UK. Height: 75cm (30"). Spread: 50cm (20").

More info
    • 5 x berkheya Postiplugs plants

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 10 x berkheya Postiplugs plants

    • Despatch: By end of August 2016
    • SAVE* £4.99  
    • £19.98 £14.99
    • 20 x berkheya Postiplugs plants

    • Despatch: By end of August 2016
    • SAVE* £19.97  
    • £30.96 £19.99