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 37 products.
 

Hollyhock rosea 'Pleniflora' (Large Plant)

Alcea rosea

Hollyhocks are classic cottage garden perennials. They provide spires of ruffled, pompom blooms, which are excellent for adding colour and height to summer borders. Plant Hollyhock 'Pleniflora' at the back of borders where their striking blooms will tower over lower growing plants. Height: 180cm (71"). Spread: 60cm (24").

Culinary note: try crystallising the flowers for a tasty cake decoration, or use them to make a delicately flavoured syrup to use with puddings. For more details about edible flowers click here.

 

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

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 2 x 1 litre potted hollyhock plants

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

Shasta Daisy 'Goldfinch' (Large Plant)

Leucanthemum × superbum

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 August 2016
    •  
    • £12.99
    • 2 x 3 litre potted leucanthemum plants

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

Sedum 'Herbstfreude' (Large Plant)

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").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3.5 litre potted sedum plant

    • Despatch: By end of July 2016
    •  
    • £10.99
    • 2 x 3.5 litre potted sedum plants

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

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

Red Hot Poker 'Fire Dance' (Large Plant)

Kniphofia

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: By end of August 2016
    •  
    • £12.99
    • 2 x 1 litre potted red hot poker plants

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

Hollyhock 'Nigra' (Large Plant)

Alcea rosea

Superbly dramatic; the tall spires of Hollyhock 'Nigra' bear dark maroon-black flowers with pale contrasting eyes. This impressive variety of an old garden favourite is sure to draw attention for its stature and colour. Try growing it alongside paler varieties for a really striking contrast. These hardy perennials make a beautiful cut flower for a vase indoors too. Height: 200cm (79"). Spread: 60cm (24").,

Culinary note: try crystallising the flowers for a tasty cake decoration, or use them to make a delicately flavoured syrup to use with puddings. For more details about edible flowers click here.

 

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

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 2 x 1 litre potted hollyhock plants

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

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 August 2016
    •  
    • £12.99
    • 10 delphinium postiplug plants

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

Ajuga reptans 'Rainbow' (Large Plant)

Grown for its extraordinary foliage, Ajuga reptans 'Rainbow' forms a dense mat of multicoloured groundcover. The rounded leaves are streaked and spotted with bronze, yellow, pink and cream, brightening even the shadiest corner of the garden. In early summer, the blue flower spikes of Bugle attract bees and pollinating insects. This low growing evergreen perennial has a reputation for being tough and resilient, spreading through the front of borders, rockeries and woodland areas with ease. Height: 15cm (6"). Spread: 60cm (24").

 

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

    • Despatch:
    •  
    • £7.99
    • Out of stock
    • 2 x 9cm potted ajuga plants

    • Despatch:
    •  
    • £11.99
    • Out of stock

Coreopsis 'Full Moon' (Large Plant)

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: By end of August 2016
    •  
    • £7.99
    • 2 x 1 litre potted coreopsis plants

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

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 August 2016
    •  
    • £12.99
    • 2 x 2 litre potted lupinus plants

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

Gaura lindheimeri 'Rosyjane' (Large Plant)

Gaura is a welcome addition to a mixed perennial border. The wiry, informal plants will fill gaps quickly and easily, with flowers from May to September, that's 5 months of summer colour!

Gaura 'Rosyjane' is a breeding breakthrough, with large flowers, pure white and edged in candy pink. A star of the Chelsea Flower Show, and a real treat for your cottage garden border! Quick to establish and form clumps. Height and Spread: 60cm (24").

 

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

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 2 x 2 litre potted gaura plants

    • Despatch: By end of August 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