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 35 products.
 

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").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3 litre potted helenium plant

    • Despatch: By end of July 2016
    •  
    • £14.99
    • 2 x 3 litre potted helenium plants

    • Despatch: By end of July 2016
    •  
    • £24.99

Red Hot Poker 'Fire Dance' (Large Plant)

Kniphofia, Torch Lily

The Red Hot Poker is instantly recognisable. This reliable perennial is an old favourite for mixed herbaceous borders. Kniphofia 'Fire Dance' is a particularly useful selection, as it's extremely cold hardy. The scarlet and yellow blooms rise above dense clumps of evergreen foliage in summer.Plants also prove remarkably rabbit proof and these robust plants are loved by bees and butterflies too. Height: 50cm (20") Spread: 60cm (24").

 

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

    • Despatch:
    •  
    • £12.99
    • Out of stock
    • 2 x 1 litre potted red hot poker plants

    • Despatch:
    •  
    • £19.99
    • Out of stock

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:
    •  
    • £10.99
    • 2 x 3.5 litre potted sedum plants

    • Despatch:
    •  
    • £19.99

Delphinium 'New Millennium Dwarf Mixed'

We source our delphinium stocks from the best breeder in the world to guarantee top performance from our plants in your garden. The 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 July 2016
    •  
    • £12.99
    • 10 delphinium postiplug plants

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

Brunnera macrophylla 'Jack Frost' (Large Plant)

Siberian Bugloss

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").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3 litre potted brunnera plant

    • Despatch: By end of September 2016
    •  
    • £12.99
    • 2 x 3 litre potted brunnera plants

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

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").

 

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

    • Despatch: By end of July 2016
    •  
    • £12.99
    • 2 x 2 litre potted lupinus plants

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

Coreopsis 'Full Moon' (Large Plant)

Tickseed

Large, buttery-yellow daisy flowers appear above a low mound of finely cut foliage from July to September. Instead of setting seed, Coreopsis 'Full Moon' puts all of its energy into flowering over a long period, so you can be sure of a great display throughout the summer. This easy to grow, hardy perennial forms well branched plants that will happily fill gaps in sunny borders or patio containers. A good cut flower and a great addition to wildlife areas for its nectar rich blooms. Height and spread: 60cm (24").

 

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

    • Despatch:
    •  
    • £7.99
    • Out of stock
    • 2 x 1 litre potted coreopsis plants

    • Despatch:
    •  
    • £12.99
    • Out of stock

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").

 

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

    • Despatch: By end of July 2016
    •  
    • £9.99
    • 2 x 2 litre potted lupin plants

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

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").

 

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

    • Despatch: By end of September 2016
    •  
    • £7.99
    • 2 x 1 litre potted euphorbia plants

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

Shasta Daisy 'Goldfinch' (Large Plant)

Leucanthemum × superbum, Chrysanthemum maximum, Shasta Daisy

This exciting modern cultivar is the most yellow Leucanthemum to date. The semi double blooms of Shasta Daisy 'Goldfinch' open a bright lemon colour that slowly fades to pale ivory as the blooms age. This compact variety is well branched and bushy, flowering for weeks from late spring onwards and attracting bees and butterflies to its nectar rich blooms. This reliable hardy perennial is undemanding and easy to grow in borders and wildlife areas. It also makes a lovely cut flower. Height and spread: 60cm (24").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3 litre potted leucanthemum plant

    • Despatch: By end of July 2016
    •  
    • £12.99
    • 2 x 3 litre potted leucanthemum plants

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

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").

 

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

    • Despatch:
    •  
    • £7.99
    • Out of stock
    • 1 x 2 litre potted helenium plant

    • Despatch: By end of July 2016
    •  
    • £12.99
    • 1 x 3 litre potted helenium plant

    • Despatch:
    •  
    • £12.99
    • Out of stock
    • 2 x 1 litre potted helenium plants

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

    • Despatch:
    •  
    • £19.99
    • Out of stock

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 July 2016
    •  
    • £9.99