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.



We have found 15 products.
 

Echinacea purpurea 'Primadonna'

Coneflower

An improved strain of this popular American wildflower! These superb coneflowers form low growing clumps of leaves from which the sturdy flower stems launch upwards with their large, rose-pink daisies. Unlike many varieties, the petals of Echinacea purpurea 'Primadonna' radiate outwards instead of downwards from a deep orange-brown central cone. With a compact, branching habit, this fabulous variety makes a lovely addition to borders and wildlife gardens where it will attract butterflies and other pollinating insects. Height: 85cm (33"). Spread: 45cm (18"). More info
    • 6 plug plants

    • Despatch: By end of March 2015
    •  
    • £4.99

Poppy 'Pizzicato'

Papaver orientale, Oriental Poppy

 Customer Rating
This stunning Oriental Poppy fills the gap between the end of your spring bulbs and the start of your summer flowers. A neat semi dwarfing variety, Poppy 'Pizzicato' produces up to 20 large flowers per plant, carried on stiff, sturdy stems that are surprisingly tolerant of windy weather. The faded flowers are followed by attractive seed heads that add interest to late summer borders. Perfect for containers, cottage garden borders and wildlife gardens. Height: 50cm (19”). Spread: 30cm (12”).
More info
    • 6 plug plants

    • Despatch: By end of March 2015
    •  
    • £5.99
    • 12 plug plants

    • Despatch: By end of March 2015
    •  
    • £8.99

Tropaeolum speciosum

Flame Nasturtium, Flame Flower, Flame Creeper

Exotic, spurred blooms in bright, vermillion red appear throughout summer in a rich explosion of colour. The vibrant blooms are followed by spherical blue fruits set against a backdrop of attractive dark green foliage. Tropaeolum speciosum is an intriguing climbing perennial that prefers a cool, sheltered position. This sought after plant creates a spectacular sight when grown through mature shrubs or scrambling over low walls. Height: 3m (10'). Spread: 1.2m (4').
More info
    • 2 bareroot plants

    • Despatch: By end of February 2015
    •  
    • £12.99
    • 4 bareroot plants

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

Agapanthus 'Collection'

African Blue Lily

This magnificent Agapanthus collection will grace your summer garden with elegance and stature. Including blue, white and violet-blue, these spectacular Agapanthus flowers are balanced on tall stiff stems, making superb cut flowers, or alternatively forming attractive autumn seed heads if left intact. With large strap-shaped leaves and distinctive flower heads, these impressive hardy perennials are ideal for adding architectural presence to borders and containers.


  • Collection comprises 1 plant each of:
  • Agapanthus 'Snow Cloud' – Aptly named, this tall, evergreen Agapanthus produces massive umbels which are densely packed with snow-white flowers. Height: 1m (3’). Spread: 45cm (18").
  • Agapanthus 'Northern Star' – Tall Agapanthus producing large umbels of violet-blue flowers with dark purple central stripes. Height: 90cm (35"). Spread: 45cm (18").
  • Agapanthus 'Silver Moon' – Dwarf Agapanthus producing pale blue flowers above clumps of striking, pale green and white variegated leaves. Height: 60cm (24"). Spread: 45cm (18").
More info
    • 3 x 9cm potted plants - 1 of each variety

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

Lily of the Valley 'Mary Brooks'

Convallaria

  • New in 2014
Illuminate shady borders with vibrant golden green foliage of Lily of the Valley ‘Mary Brooks’. This choice variety has the same deeply fragrant spring blooms as its greener cousins but provides visual impact as well as a fabulous perfume. An iconic spring bulb, Convallaria makes superb ground cover, forming lush carpets of foliage that need little maintenance and positively thrive in woodland gardens and damp shady areas. Height: 20cm (8"). Spread: 30cm (12").
More info
    • 1 flowering size pip

    • Despatch:
    •  
    • £14.99
    • Out of stock
    • 3 flowering size pips

    • Despatch:
    • SAVE £24.98  
    • £44.97 £19.99
    • Out of stock

Dierama Collection

Angel's Fishing Rod

  • New in 2014

Clusters of delicate bell shaped flowers dangle from impossibly slender stems that arch and tremble in the breeze. From July, the elegant blooms rise above clumps of slender, semi-evergreen, grass like foliage before giving way to attractive seedheads in late summer. Dierama is a truly graceful hardy perennial and makes a most beautiful addition to cottage garden borders, adding movement and fluidity to planting schemes. Often referred to as Angel’s Fishing Rod, it looks particularly attractive when overhanging water. Height: 100cm (39"). Spread: 45cm (18").

  • Collection comprises:
  • Dierama argyruem - Dazzling white bell shaped flowers that dangle from arching stems.
  • Dierama ‘Blackberry Bells’ - Deep purple pink blooms on wiry stems.
  • Dierama erectum - Stiffer stems filled with outward facing blooms, rather than pendulous flowers.
More info
    • 3 x 9cm potted plants

    • Despatch: By end of March 2015
    • HALF PRICE  
    • £16.99 £8.49
    • 6 x 9cm potted plants

    • Despatch: By end of March 2015
    • HALF PRICE  
    • £24.99 £12.49

Marsh Orchid

Dactylorhiza majalis, Spotted Orchid

Spires of deep pink intricately patterned flowers are carried on tall stems above linear green foliage each summer. These unusual terrestrial Marsh orchids are natives of European marshlands so they are perfectly hardy. Dactylorhiza majalis is surprisingly easy to grow when planted in reliably moist or boggy soils, and you can even try it in containers. Height: 45cm (18"). Spread: 15cm (6"). More info
    • 2 bareroot plants

    • Despatch:
    •  
    • £20.99
    • Out of stock

Clematis 'Fascination'

Old Man's Beard

  • Try a different type of clematis this season
A superb non climbing, herbaceous clematis that is perfect for scrambling through shrubs, over banks and tumbling down walls. The gently scented violet purple flowers are followed by decorative seed heads for a long lasting display. Clematis 'Fascination' is particularly easy to maintain as it can be cut back to almost ground level each year. Height: 150cm (60”). Spread: 75cm (30”). Pruning group: 3.

Useful links:

How to prune a clematis

More info
    • 1 x 9cm potted clematis plant

    • Despatch: By end of August 2015
    •  
    • £14.99
    • 2 x 9cm potted clematis plants

    • Despatch:
    •  
    • £19.98
    • Out of stock

Poppy 'Plum Pudding'

Papaver orientale, Oriental Poppy

  • World Exclusive
  • Best in class for oriental poppies
  • T&M's own breeding
From T&M's own breeding programme comes this superb Oriental poppy. Beautiful tissue-like blooms in a rich shade of plum-pink appear from June, and often give a second display later in the summer. The strong stems and non-fading flowers are longer lasting than most varieties, making this a significant improvement on the popular variety 'Patty's Plum'. By late summer Poppy 'Plum Pudding' produces attractive seed heads that make an eye catching feature in wildlife or cottage garden borders. Height: 75cm (30"). Spread: 60cm (24").

Useful links:

Read more on our blog: Another Plant of the Year award for T&M?

More info
    • 12 plug plants

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 24 plug plants

    • Despatch:
    • SAVE £4.99  
    • £19.98 £14.99
    • Out of stock

Allium 'Gladiator' (Large Plant)

Ornamental Onion

Hundreds of starry purple blooms with delicate silvery tips form these incredible allium flower heads. The magnificent, spherical blooms of Allium ‘Gladiator’ are up to 15cm (6") across! Flowering only once in a season, the blooms are followed by skeletal seedheads for a spectacular autumn display. Undemanding and easy to grow, these purple alliums are guaranteed to add the ‘wow’ factor to borders and cut flower arrangements. Height: 120cm (48"). Spread: 15cm (6"). More info
    • 1 x 2 litre potted allium plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 2 litre potted allium plants

    • Despatch:
    •  
    • £16.99
    • Out of stock

Allium 'Globemaster' (Large Plant)

Ornamental Onion

Hundreds of starry lilac-purple blooms form the incredible flower heads of this RHS AGM variety. The magnificent, spherical blooms of Allium ‘Globemaster’ are up to 15cm (6") across! Flowering only once in a season, the blooms are followed by skeletal seedheads for a spectacular autumn display. Undemanding and easy to grow, these purple alliums are guaranteed to add the ‘wow’ factor to borders and cut flower arrangements. Height: 80cm (31"). Spread: 15cm (6"). More info
    • 1 x 3 litre potted allium plant

    • Despatch:
    •  
    • £12.99
    • Out of stock
    • 2 x 3 litre potted allium plants

    • Despatch:
    •  
    • £22.99
    • Out of stock

Allium stipitatum 'Mount Everest' (Large Plant)

Ornamental Onion

Allium bulbs are very easy to grow, and will look after themselves in the garden. Allium ‘Mount Everest’ produces globes of more than 50 star-shaped blooms during June, just after the spring bulbs, but before the summer bedding comes into flower.

Allium are ideal for dry gardens, and there is no need to lift the bulbs at the end of the season, as they are fully hardy. You will be amazed at how beautiful these flowers can be, for the minimum of effort! Height: 1.2m (3.9’). Spread: 15cm (6").

More info
    • 1 x 3 litre potted allium plant

    • Despatch:
    •  
    • £10.99
    • Out of stock
    • 2 x 3 litre potted allium plants

    • Despatch:
    •  
    • £19.99
    • Out of stock