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 18 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 September 2016
    •  
    • £9.99
    • 2 x 1 litre potted hollyhock plants

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

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 September 2016
    •  
    • £9.99
    • 2 x 1 litre potted hollyhock plants

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

Phlox paniculata 'Laura' (Large Plant)

Phlox paniculata 'Laura' is a particularly fine variety with a long flowering period and good resistance to mildew. This magnificent perennial produces panicles of lilac purple flowers with starry white centres all summer long. The tall stems make superb cut flowers that will fragrance bouquets with their rich, heady scent. This clump forming perennial Phlox is perfect for cottage garden borders where its blooms will attract attention from pollinating insects. Height and spread: 90cm (36").,

Culinary note: Some parts of these flowers are edible. Add the small flowers to fruit salads or crystallise them for decorating desserts. For more details about edible flowers click here.

 

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

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

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

Lobelia cardinalis 'Queen Victoria' (Large Plant)

Tall spikes of deep maroon foliage topped by glowing scarlet blooms bring a welcome splash of late summer colour, when many flowers have already faded. This exotic looking, short lived perennial is ideal for filling gaps in damp borders, and looks spectacular planted beside ponds and streams. Height: 90cm (36"). Spread: 30cm (12").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 1 x 3 litre potted lobelia plant

    • Despatch: By end of September 2016
    •  
    • £12.99
    • 2 x 1 litre potted lobelia plants

    • Despatch: By end of September 2016
    •  
    • £14.99
    • 2 x 3 litre potted lobelia plants

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

Anemone x hybrida 'Honorine Jobert' (Large Plant)

Japanese Anemone

A classic Anemone, which is incredibly easy to grow, and gives impressive displays from late summer to autumn, coming back every year. Anemone x hybrida 'Honorine Jobert'will perform best in a shady garden, and will spread quickly and easily.

Japanese Anemones are reliable garden plants, which are ideal for first time gardeners. Plants will last for years in the garden, and are very rabbit resistant. Height and Spread: 90cm (35").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 1 x 2 litre potted anemone plant

    • Despatch: By end of September 2016
    •  
    • £12.99
    • 2 x 1 litre potted anemone plants

    • Despatch: By end of September 2016
    •  
    • £16.99
    • 2 x 2 litre potted anemone plants

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

Anemone tomentosa 'Serenade' (Large Plant)

This charming Anemone makes a tall, herbaceous perennial with generous amounts of late summer blooms, often lasting well into the autumn. The flowers of Anemone tomentosa 'Serenade'are candy pink, and unusually semi-double, with 2 rows of soft petals.

Japanese Anemones are excellent garden plants, which are ideal for beginners. Once established, plants will last for years in the garden, with very little effort. Plants are also extremely rabbit resistant. Height and Spread: 90cm (35").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre anemone potted plants

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

Morina longifolia (Large Plant)

This handsome evergreen perennial forms basal rosettes of attractive, glossy foliage with spiny margins and a lovely citrus aroma. From midsummer, Morina longifolia bears imposing, upright stems that are tiered with whorls of white, waxy flowers. As the blooms are pollinated they turn to pink, and eventually red, so that one single stem may carry three different colours for you to admire. The whorlflower is a fascinating specimen for perennial borders and makes a pleasing cut flower too. Height: 90cm (36"). Spread: 30cm (12").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre potted morina plants

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

Cerinthe major 'Purpurascens' (Large Plant)

Honeywort

 Customer Rating
Also known as Honeywort, this unusual annual bears rounded, blue-green leaves on slender, upright stems. From late spring onwards masses of nodding, rich purple flowers, surrounded by blue-purple bracts appear at the stem tips, which are highly attractive to bees. With a bushy habit, Cerinthe major ‘Purpurascens’ is a fantastic addition to annual beds or used to fill gaps in herbaceous borders, where it is happy in any well drained soil. Height: 60cm (24"). Spread: 45cm (18").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre potted cerinthe plants

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

Hypericum calycinum (Large Plant)

St. John's Wort, Rose of Sharon

Rose of Sharon is a well-known shrub up and down the UK, thanks to its low-growing, ground covering habit, needing virtually no maintenance. Once established, Hypericum calycinum will grow almost anywhere from fertile, moist soil to poor, dry conditions, plants will even thrive in deep shade! The large, daffodil-yellow flowers of Rose of Sharon carry a central powder-puff of anthers from summer to autumn. Hypericum is a versatile shrub, which makes excellent spreading, landscape-style ground cover for borders and woodland areas. Plants can also be trimmed into an attractive low hedge. Height: 60cm (24"). Spread: 150cm (59").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre potted hypericum plants

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

Hollyhock 'Creme de Cassis' (Large Plant)

Alcea rosea, Althaea rosea

Hollyhocks are a cottage garden essential, bringing height and stature to the back of perennial borders. Hollyhock 'Crème de Cassis' is particularly mouth-watering with veined flowers in juicy blackcurrant that fade to paler berry shades around the edges. Each vertical stem bears a fascinating mix of double, semi double and single blooms. Hollyhocks make handsome cut flowers for summer bouquets. The nectar rich blooms are also a magnet for butterflies. 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 September 2016
    •  
    • £9.99
    • 2 x 1 litre potted hollyhock plants

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

Verbascum olympicum (Large Plant)

Verbascum longifolium var. pannosum, Olympian Mullein

For almost instant impact in cottage garden borders, look no further than Verbascum olympicum. This imposing perennial will fill a gap in hot dry borders and makes a spectacular focal point, growing to 2 metres in next to no time! The felted, silver rosette of basal foliage plays host to tall spikes of buttery-yellow flowers. Verbascum olympicum is a relatively short lived perennial, which tends to bloom in its third year, and often dies after its spectacular display. However this Mullein is a vigorous self-seeder so you can look forward to plenty of new seedlings popping through the soil to take its place.

This low maintenance perennial is an excellent summer addition to borders, performing best in poor soils where many other plants would struggle to establish. A low maintenance Mullein for cottage gardens and wildlife gardens. Height: 2m (6.6'). Spread: 60m (24").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre potted verbascum plants

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

Penstemon 'Appleblossom' (Large Plant)

This pretty little Penstemon bears pale pink, tubular flowers with white throats, above glossy, narrow foliage. Penstemon 'Appleblossom' is semi-evergreen, with a neat, bushy habit that sits nicely towards the front of perennial borders. This popular variety is easy to grow and holds an RHS AGM for its superb garden performance. Height and spread: 60cm (24").

 

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

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 1 x 2 litre potted penstemon plant

    • Despatch: By end of September 2016
    •  
    • £12.99
    • 2 x 1 litre potted penstemon plants

    • Despatch: By end of September 2016
    •  
    • £14.99
    • 2 x 2 litre potted penstemon plants

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