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.


For beautiful summer flowers browse our range of annual plants.



We have found 21 products.
 

Geranium himalayense 'Birch Double'

Geranium himalayense 'Plenum', Hardy Geranium, Cranesbill

Vigorous and versatile, this superb cranesbill tolerates almost any situation; even full shade. A mass of double purple-pink blooms stand above the delicately serrated foliage which turns to shades of burnt red and orange in autumn. Geranium himalayense 'Birch Double' will quickly blend with other herbaceous perennials to create colourful groundcover and looks equally attractive in herbaceous borders and shady woodland gardens. Height: 25cm (10"). Spread: 60cm (24"). More info
    • 1 bare root geranium plant

    • Despatch: By end of November 2015
    •  
    • £12.99

Delphinium 'New Millennium Dwarf Mixed'

  • New in 2015
We source our delphinium stocks from the best breeder in the world to guarantee top performance from our plants in your garden. WThe towering flower spires that make delphiniums a must-have garden perennial, can require sturdy staking to prevent them flopping under wind and rain. We're looking to change that with Delphinium 'New Millennium Juniors Mixed'. The sturdy upright stems don't need any staking or support, but give the same cottage garden feel as traditional varieties. From the world famous breeding of Terry Dowdeswell in New Zealand, these shorter, sturdier plants have been bred to perfection, with clear colours, evenly spaced florets, long flowering and high disease resistance. Height: 75cm (30"). Spread: 60cm (24").
More info
    • 5 delphinium postiplug plants

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 10 delphinium postiplug plants

    • Despatch: By end of September 2015
    •  
    • £14.99

Brunnera macrophylla 'Jack Frost' (Large Plant)

Siberian Bugloss

  • New in 2015

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 complimented 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").

More info
    • 1 x 3 litre potted brunnera plant

    • Despatch: By end of August 2015
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    • £12.99
    • 2 x 3 litre potted brunnera plants

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

Helenium 'Moerheim Beauty' (Large Plant)

Helen's Flower, Sneezeweed

Don't get caught out with a colour-less, late summer garden - Helenium actually flower much later in the summer, so are excellent for extending the season of colour! Helenium ‘Moerheim Beauty' is a choice variety, with copper-red flowers.

This hardy perennial is loved by bees and butterflies, and is the proud holder of an RHS Award of Garden Merit, so comes highly recommended as a reliable garden plant. Sneezeweed is tall, and is great for filling gaps in borders and adding height. It looks particularly good with grasses. Height: 90cm (36"). Spread: 60cm (24").

More info
    • 1 x 3 litre potted helenium plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 3 litre potted helenium plants

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

Hellebore 'Black Swan'

Helleborus × hybridus

  • New in 2015
  • T&M Exclusive
  • Grow the most prestigious Christmas Rose in your garden
Winter-flowering hellebores are true garden gems, producing luxuriant blooms when little else is in growth, let alone flower! Fresh from our unique hellebore breeding programme we have hit on the perfect form and habit with Hellebore 'Black Swan'. The sumptuously dark velvety petals, starkly contrasted by pure white stamens, are a vast improvement on older black-flowered hellebore plants. Where older types tend to face their blooms to the soil below, 'Black Swan' holds its jet-black blooms up for all to see. This classy performer deserves a place in every garden as the star attraction through winter. Height and spread: 60cm (2').
More info
    • 1 x 9cm potted hellebore plant

    • Despatch: By end of December 2015
    •  
    • £9.99
    • 3 x 9cm potted hellebore plants

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

Lupin 'The Page' (Large Plant)

Lupinus

Lupins are cottage garden favourites with colourful, often two-toned, strong flower spikes. Plants are undemanding, and give a long flowering period and excellent garden performance in sun or shade.

Lupin ‘The Page' is a particular favourite, with blooms in 2 distinct shades of red. Those flower spikes are invaluable in the early season herbaceous border, as the display begins in June each year. Height: 1.2m (3.9') Spread: 60cm (24").

More info
    • 1 x 2 litre potted lupin plant

    • Despatch: By end of August 2015
    •  
    • £9.99
    • 2 x 2 litre potted lupin plants

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

Golden Lysimachia

Lysimachia punctata, Dotted Loosestrife

  • A towering, elegant plant for the border
Bring some sunshine to your borders with this resilient cottage-garden favourite. Neat clumps of tall, elegant stems with striking yellow flowers are borne from mid-summer through until early autumn. Golden Lysimachia is great for difficult clay soils and shadier parts of the garden, thriving in damp borders, bog gardens or at the margins of a pond. Grow dotted loosestrife in woodland gardens or informal areas for a burst of late summer colour! Height: 90cm (35"). Spread: 60cm (24").
More info
    • 5 golden lysimachia Postiplug plants

    • Despatch: By end of August 2015
    •  
    • £9.99
    • 10 golden lysimachia Postiplug plants

    • Despatch: By end of August 2015
    • SAVE £4.99  
    • £19.98 £14.99

Lupin 'Noble Maiden' (Large Plant)

Lupinus

No cottage garden would be complete without the well loved Lupin, and this one is stunning in its simplicity. Tall spires of snow white blooms rise above clumps of palmate foliage in early summer. Lupin 'Noble Maiden' makes a particularly effective choice for brightening dappled shade in woodlands, where its pale flowers appear luminescent. Height: 90cm (36"). Spread: 75cm (30"). More info
    • 1 x 2 litre potted lupinus plant

    • Despatch: By end of August 2015
    •  
    • £12.99
    • 2 x 2 litre potted lupinus plants

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

Actaea simplex 'Black Negligee' (Atropurpurea Group)

Bugbane, Cimicifuga

Dramatic, finely cut, jet black foliage contrasts beautifully with the architectural plumes of fragrant, creamy white flowers. The bottlebrush blooms of Actaea simplex 'Black Negligee' are gently scented, appearing late in the season from September, just as other plants are fading. Bugbane is a particularly useful hardy perennial, adding stature and impact to damp, shady spots. Perfect for cottage garden borders and woodland planting schemes. Height: 120cm (47"). Width: 60cm (24").
More info
    • 1 x actaea jumbo plug plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 3 x actaea jumbo plug plants

    • Despatch: By end of September 2015
    • SAVE £4.99  
    • £19.98 £14.99

Helenium 'Double Trouble' (Large Plant)

Helen's Flower, Sneezeweed

This modern variety is the first fully double Helen's Flower! Its delightfully narrow, golden petals form a ruffled collar around a button-like centre. Helenium 'Double Trouble' is a tall, well branched form that makes a particularly good cut flower. Blooming from July to October, this hardy perennial brings fabulous late summer colour to cottage garden borders and wildlife areas, where it will attract plenty of pollinating insects. Height: 80cm (31"). Spread: 60cm (24"). More info
    • 1 x 1 litre potted helenium plant

    • Despatch: By end of August 2015
    •  
    • £7.99
    • 1 x 3 litre potted helenium plant

    • Despatch: By end of August 2015
    •  
    • £12.99
    • 2 x 1 litre potted helenium plants

    • Despatch: By end of August 2015
    •  
    • £12.99
    • 2 x 3 litre potted helenium plants

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

Sedum 'Herbstfreude' (Large Plant)

Sedum spectabile 'Autumn Joy', Stonecrop

Sedum are a magnet for butterflies in the garden; and are reliable, hardy and always colourful! Sedum ‘Herbstfreude' forms a clump, with drought tolerant, fleshy foliage, and pink autumn blooms.

Sedum are most at home in hot, sunny borders, and require zero maintenance, so are ideal for beginners. Their autumn flowering period is useful for extending the season of interest in the garden. Height and spread: 60cm (24").

More info

    • 1 x 3.5 litre potted sedum plant

    • Despatch: By end of August 2015
    •  
    • £10.99
    • 2 x 3.5 litre potted sedum plants

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

Euphorbia characias 'Black Pearl' (Large Plant)

Milkweed, Spurge

A unique plant which gives all year round interest! Euphorbia are fully hardy, and will tolerate dry, sunny borders and periods of drought. Plants are evergreen and architectural, and possibly offer the longest flowering period of any garden plant. The unique black and green flowers of Euphorbia characias 'Black Pearl' are full of sweet nectar, and open in spring, and stay in place until the first frosts. Euphorbia will thrive in dry gardens, Mediterranean-style plantings and large patio pots. Height and Spread: 60cm (24"). More info
    • 1 x 1 litre potted euphorbia plant

    • Despatch: By end of August 2015
    •  
    • £7.99
    • 2 x 1 litre potted euphorbia plants

    • Despatch: By end of August 2015
    •  
    • £12.99