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 123 products.
 

Iberis sempervirens (Large Plant)

Sprays of white, fragrant blooms smother the evergreen foliage of this Candytuft. Iberis sempervirens thrives in poor soils making this RHS AGM variety particularly useful for ground cover in rockeries and on top of walls. This shrubby perennial is equally at home in the front of borders where it will attract beneficial insects to its scented flowers. Height: 30cm (12"). Spread: 50cm (20").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre potted iberis plants

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

Aquilegia vulgaris 'William Guinness' (Large Plant)

The striking black bonnets of Aquilegia 'William Guiness' make a superb contrast with the white corolla. The exquisite blooms of this classic cottage garden perennial are carried on wiry stems, set above pretty ferny foliage. This hardy Columbine is perfect for en masse in borders and shady woodland edges, and makes an attractive cut flower for a vase indoors. Height: 75cm (30"). Spread: 30cm (12").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre potted aquilegia plants

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

Pachysandra terminalis (Large Plant)

Forming a dense mat of glossy evergreen leaves, Japanese Spurge is an ideal groundcover plant for growing in areas between shrubs and trees to prevent weeds from getting the chance to grow. The interesting foliage grows in rosettes of green toothed leaves which each produce a spike of small white flowers in early summer. Requiring virtually no aftercare once planted, this perennial plant can be allowed to spread wherever you let it, leaving you to enjoy your garden without having to worry about it. Height: 20cm (8"). Spread: 150cm (59").

 

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

    • Despatch: By end of September 2016
    •  
    • £7.99
    • 2 x 9cm potted pachysandra plants

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

Acanthus spinosus (Large Plant)

Acanthus spinosus is robust, architectural plant with exotic-looking foliage and erect spikes of equally exotic blooms. They may look tropical, but Acanthus is fully hardy in the UK, and enjoys sun or shade on a well-drained soil, is very drought tolerant and can tolerate exposed conditions.

Acanthus are also known as Bear's Breech, they make an excellent herbaceous perennial for mixed borders, growing up to 1.2m (3.9') and filling gaps easily. The spiny, purple-tinged flowers appear from late spring to summer. An easy to maintain border plant that comes back year after year. Height: 1.2m (3.9'). Spread: 1m (39").

 

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

    • Despatch: By end of September 2016
    •  
    • £10.99
    • 2 x 1 litre potted acanthus plants

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

Polygonatum biflorum (Large Plant)

Here's something to liven up a dark, shady corner in your garden! Solomon's Seal is a beautiful, spring-flowering perennial, which is often much admired. The arching stems look exotic, and feature pairs of droplet blooms in cream. Polygonatum biflorum plants are quick-growing and a low-maintenance choice for mixed borders. Plant Solomon's Seal amongst ferns and hellebores in a shady border for a real treat! Height: 200cm (78"). Spread: 60cm (24").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre potted polygonatum plants

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

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 September 2016
    •  
    • £9.99
    • 10 phlox jumbo plug plants

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

Dianthus barbatus 'Mixed' (Garden Ready)

Sweet William

  • 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.


Enjoy the sweet clove like fragrance of this cottage garden favourite with the minimum of effort. This traditional mix of Sweet Williams combines a fabulous range of pinks, reds and white including solid shades and bicolours for a real tapestry of colour. Dianthus barbartus 'Mixed' carries its large clusters of flowers upon short, compact plants that make superb bedding. Often grown as a biennial, this short lived perennial is ideal for beds and borders. Height: 15cm (6"). Spread: 25cm (10").


Culinary note: Use the clove like tasting petals for adding to cakes, either for flavour or decorating, suitable for soups, salads and sauces too. For more details about edible flowers click here.

 

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

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

Agapanthus 'Twister'

African Blue Lily

  • Stunning Bicolour flowers
  • Perfect for striking patio displays
  • Mid to Late Summer Flowering
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").

Why not add a patio pot to your order? - perfect for planting up your Agapanthus plants!
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

Vinca 'Collection'

Periwinkle 'Collection'

Periwinkle is one of the toughest plants you'll find, flowering relentlessly throughout the summer months in lovely shades of purple, pink and white. This vigorous low growing shrub thrives in virtually any garden position, from full sun to the darkest, shady corners. The clump forming stems provide evergreen dark green and variegated foliage that makes useful, weed suppressing ground cover. This colourful collection of Vinca major are perfect for filling those tricky areas of the garden where little else grows.
  • Collection comprises:
  • Vinca major 'Variegata' - Sky blue flowers set against variegated foliage. Height: 45cm (18"). Spread: 75cm (30").
  • Vinca minor 'Atropurpurea' - Deep plummy purple flowers. Height: 20cm (8") Spread: 50cm (19").
  • Vinca minor f. alba 'Gertrude Jekyll' - Profuse white flowers, carried on compact plants. Height: 20cm (8") Spread: 50cm (19").
More info
    • 6 vinca jumbo plug plants

    • Despatch:
    •  
    • £13.99
    • Out of stock
    • 12 vinca jumbo plug plants

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

Clematis 'Picotee Kiss'

  • Large blooms for big impact
  • Each petal like a lipstick kiss!
  • Flowers in spring and again in summer

One of the finest hardy clematis introductions in recent years, expect Clematis ‘Picotee Kiss’ to be a future classic. The dazzling pink picotee-edged blooms, each up to 15cm (6in) across, have amazed us on the trial ground, adorning the plants in abundance - once in spring and again in summer! Enjoy the first flush of blooms through May-June, then watch the plants flush into colour again though July-September. Each petal looks like a lipstick kiss! Be one of the first UK gardeners to cover walls, fences and trellis with the stand-out flowers of Clematis ‘Picotee Kiss’. Height: 210cm (83"). Spread 100cm (39"). Pruning Group 2.
More info
    • 1 x 7cm potted clematis plant

    • Despatch: By end of September 2016
    •  
    • £13.99 £9.99
    • 2 x 7cm potted clematis plants

    • Despatch: By end of September 2016
    •  
    • £19.99 £14.99

Salvia x jamensis 'Hot Lips' (Large Plant)

Salvia microphylla 'Hot Lips'

Spice up your summer patio pots with Salvia 'Hot Lips'. Naturally bushy plants boast eye-catching flower spikes with open-mouthed, bicolour blooms. In particularly hot weather look out for individual flowers in solid red or solid white. The aromatic foliage has a fine blackcurrant fragrance that only adds to its charm. This showy ornamental sage is perfect for cottage garden borders and containers, or incorporated into bedding schemes for a vibrant summer display. Although perennial, this half hardy Salvia will appreciate some protection from winter weather. Height: 90cm (35"). Spread: 60cm (24").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 2 litre potted salvia plants

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

Anemone x hybrida 'Honorine Jobert' (Large Plant)

Japanese Anemone

A classic Anemone, which is incredibly easy to grow, and gives impressive displays from late summer to autumn, coming back every year. Anemone x hybrida 'Honorine Jobert'will perform best in a shady garden, and will spread quickly and easily.

Japanese Anemones are reliable garden plants, which are ideal for first time gardeners. Plants will last for years in the garden, and are very rabbit resistant. Height and Spread: 90cm (35").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 1 x 2 litre potted anemone plant

    • Despatch: By end of September 2016
    •  
    • £12.99
    • 2 x 1 litre potted anemone plants

    • Despatch: By end of September 2016
    •  
    • £16.99
    • 2 x 2 litre potted anemone plants

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