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. Use the selections in the left menu to select the right plants for your garden.



We have found 20 products.
 

Dierama Collection

Angel's Fishing Rod

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
    •  
    • £16.99
    • 6 x 9cm potted plants

    • Despatch: By end of March 2015
    • SAVE £8.99  
    • £33.98 £24.99

Sanguinaria canadensis f.multiplex

Bloodroot, Red Puccoon

Although rarely seen in the garden centres, Sanguinaria canadensis f.multiplex is a beautiful plant for a damp shady spot in the garden. Small white blooms that resemble tiny waterlilies emerge from between the blue-green leaves in spring. The elegant flowers are delicately scented with a light, spicy fragrance. Interestingly the rhizomes of this hardy perennial exude red sap when cut, giving the plant it’s common name of Bloodroot. Perfect for woodland gardens, shaded borders and rockeries. Height: 15cm (6"). Spread: 30cm (12"). More info
    • 1 barer oot plant

    • Despatch: By end of February 2015
    •  
    • £19.99
    • 2 bare root plants

    • Despatch: By end of February 2015
    • SAVE £9.99  
    • £39.98 £29.99

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

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 bare root plants

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

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

Eryngium planum 'Blue Hobbit' (Large Plant)

Sea Holly, Blue Eryngo

Eryngium are handy little plants for the border, as they'll grow in many different types of soil, and the flower power of Eryngium 'Little Hobbit' is second to none!

Eryngium 'Little Hobbit' is a unique, dwarf Eryngium, which can be grown in a patio pot. The 30cm (12") plants become top-heavy in midsummer, with sprays of nearly 100 inky-blue flowers. Height and Spread: 30cm (12").

More info
    • 1 x 1 litre potted plant

    • Despatch: By end of February 2015
    •  
    • £9.99
    • 2 x 1 litre potted plants

    • Despatch: By end of February 2015
    •  
    • £16.99

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

Coreopsis grandiflora (Large Plant)

Tickseed

This reliable, easy to grow perennial produces sunshine yellow blooms with serrated margins. Coreopsis flowers are always popular with bees and butterflies and make excellent cut flowers too. Flowering almost continually throughout summer and well into autumn, this versatile tickseed plant will grow almost anywhere, even in dry soil! Height and spread: 45cm (18"). More info
    • 1 x 1 litre potted plant

    • Despatch: By end of February 2015
    •  
    • £9.99
    • 2 x 1 litre potted plants

    • Despatch: By end of February 2015
    •  
    • £16.99

Delphinium 'Black Knight' (Large Plant)

Pacific Hybrid

An absolute cottage garden classic. Plant Delphiniums in bold clumps for back-of-the-border impact. Delphinium 'Black Knight' is an extra special variety with some of the deepest indigo-blue flowers, each with a black eye.

The sight of Delphiniums in a garden is simply divine. They flower from early summer, and will often flower twice. The plants are architectural and handsome, you certainly won't regret planting these handsome perennials! Height: 1.7m (5.5'). Spread: 75cm (29").

More info
    • 1 x 1 litre potted plant

    • Despatch: By end of February 2015
    •  
    • £9.99
    • 2 x 1 litre potted plants

    • Despatch: By end of February 2015
    •  
    • £16.99

Iris pallida 'Variegata' (Large Plant)

Iris pallida 'Aurea 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").

More info
    • 1 x 1 litre potted plant

    • Despatch: By end of February 2015
    •  
    • £9.99
    • 2 x 1 litre potted plants

    • Despatch: By end of February 2015
    •  
    • £16.99

Mimulus × cultorum 'Major Bees' (Large Plant)

Diplacus, Monkey Flower, Musk

Mimulus are low growing, bushy plants, which are easy to grow, producing many orchid-like flowers from early summer. They love a moist soil, and can cope with waterlogging and growing at the edge of ponds.

Monkey Flowers can be grown in borders or in patio containers, and will flower for longer in a shady corner. Mimulus 'Major Bees' is a distinctive cultivar with golden-yellow, spotted flowers. Height and spread: 50cm (20").

More info
    • 1 x 1 litre potted plant

    • Despatch: By end of February 2015
    •  
    • £9.99
    • 2 x 1 litre potted plants

    • Despatch: By end of February 2015
    •  
    • £16.99

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: By end of February 2015
    •  
    • £9.99
    • 2 x 2 litre potted allium plants

    • Despatch: By end of February 2015
    •  
    • £16.99

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: By end of February 2015
    •  
    • £12.99
    • 2 x 3 litre potted allium plants

    • Despatch: By end of February 2015
    •  
    • £22.99