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 9 products.
 

Acanthus spinosus (Large Plant)

Acanthus spinosus is robust, architectural plant with exotic-looking foliage and erect spikes of equally exotic blooms. They may look tropical, but Acanthus is fully hardy in the UK, and enjoys sun or shade on a well-drained soil, is very drought tolerant and can tolerate exposed conditions.

Acanthus are also known as Bear's Breech, they make an excellent herbaceous perennial for mixed borders, growing up to 1.2m (3.9') and filling gaps easily. The spiny, purple-tinged flowers appear from late spring to summer. An easy to maintain border plant that comes back year after year. Height: 1.2m (3.9'). Spread: 1m (39").

 

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

    • Despatch: Within 28 days
    •  
    • £10.99
    • 2 x 1 litre potted acanthus plants

    • Despatch: Within 28 days
    •  
    • £19.99

Delphinium 'Pink Blushes'

This Pink Blush is anything but embarrassing! Glorious, tall spikes of evenly spaced, perfectly formed florets in shades of pink, from pastel to magenta! The result of many years of breeding from Terry Dowdeswell, our world-class Delphinium expert in New Zealand, Delphinium 'Pink Blushes' are strong plants with disease resistance and unrivalled garden performance. Height: 1.5m (5'). Spread: 75cm (30").
More info
    • 5 delphinium Postiplug plants

    • Despatch: By end of May 2017
    •  
    • £12.99
    • 10 delphinium Postiplug plants

    • Despatch: By end of May 2017
    •  
    • £16.99

Meconopsis napaulensis

Satin Poppy, Nepal Poppy

  • Luxurious designer poppy
  • Sought after red blooms
  • A musts-have for perennial borders

Much-loved but notoriously hard to grow from seed, we’ve done the hard bit for you! Now everyone can grow the highly sought after Satin poppy with guaranteed results. This luxurious red poppy thrives on damp, cool ground and the silky, satin blooms make a real feature in shady corners of the patio. Use the deep red blooms of Meconopsis napaulensis to add warmth and cheer under trees, shrubs and shady spots. Height: 120cm (47").
More info
    • 1 x 7cm potted meconopsis plant

    • Despatch: By end of November 2016
    •  
    • £11.99 £9.99

Perovskia atriplicifolia 'Little Spire' (Large Plant)

A smaller, more compact variety of the Russian Sage, Perovskia atriplicifolia 'Little Spire' maintains all the characteristics of its large cousins without taking up as much space. Ideal for containers as well as bed and borders, this drought tolerant perennial has the advantage of the smaller flower stems not bending over under thir own weight, thus keeping its shape and form perfectly. Height: 100cm (39"). Spread: 60cm (24").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3.6 litre potted perovskia plant

    • Despatch: Within 28 days
    •  
    • £12.99
    • 2 x 3.6 litre potted perovskia plants

    • Despatch: Within 28 days
    •  
    • £19.99

Rudbeckia occidentalis 'Green Wizard' (Large Plant)

Western Coneflower

A curious and extraordinary perennial that is very different from the flashy colours of other rudbeckias. With no obvious petals, the bright green sepals of Rudbeckia 'Green Wizard' surround a black central cone. This tall variety creates an interesting spectacle for the back of borders in late summer and makes an unusual fresh cut flower that is long lasting in water, or can used in dried arrangements. Easy to grow, quickly forming a good sized plant with plenty of lush green foliage, and always a talking point. Height: 120cm (47"). Spread: 60cm (24").

 

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

    • Despatch: By end of January 2017
    •  
    • £9.99
    • 2 x 1 litre potted rudbeckia plants

    • Despatch: By end of January 2017
    •  
    • £14.99

Geranium maderense

Giant Herb Robert, Madeira Cranesbill

  • RHS Award of Garden Merit
  • The palm tree geranium
Geranium maderense is a magnificent tender perennial. The Madeira Cranesbill is the largest of the Geranium species, and certainly one of the most impressive, reaching a height of 1.5m (4',9"). Although perennial, it often acts as a biennial, producing pretty magenta pink blooms in its second year. But you won't mind the wait - it will give you time to appreciate the exotic-looking, dissected, evergreen foliage that radiates from a stout central trunk. This spectacular RHS AGM species will need some winter protection so it is best grown in the conservatory or a large patio container which can be moved to a frost free position in winter. Height: 150cm (59"). Spread: 100cm (39").
More info
    • 1 x 12cm potted geranium plant

    • Despatch: By end of April 2017
    •  
    • £19.99
    • 2 x 12cm potted geranium plants

    • Despatch: By end of April 2017
    •  
    • £29.99

Eremurus x isabellinus 'Cleopatra' (Large Plant)

Desert Candle, Foxtail Lily

Make a bold statement in your garden with these big specimen plants. The Foxtail Lily is ideal for growing through perennials and shrubs, and for filling borders. The metre-high flower spikes are quite spectacular.

Eremurus 'Cleopatra' gives unmiussable summer colour and is sure to impress the neighbours. It may look exotic, but the plants are actually really quite hardy in the garden, and will form clumps well once established. Height: 1.2m (3.9'). Spread: 1m (39").

 

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

    • Despatch: By end of April 2017
    •  
    • £11.99
    • 2 x 2 litre potted eremurus plants

    • Despatch: By end of April 2017
    •  
    • £19.99

Actaea cordifolia (Large Plant)

Cimicifuga racemosa var. cordifolia, Bugbane, Cohosh

 Customer Rating

Cimicifuga is an attractive border perennial with an exotic appearance. Actaea has a robust habit, and can fill a gap in the border with its fancy foliage and summer flower spikes, which are tall and imposing.

The flower spikes of Actaea are made up of many tiny florets, and these have a spicy fragrance. Cimicifuga is a long-lasting plant, surviving for many years, and is very useful for difficult situations, such as cold, wet corners of the garden. Height: 1m (39"). Spread: 50cm (20").

 

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

    • Despatch: By end of February 2017
    •  
    • £9.99
    • 2 x 1 litre potted actaea plants

    • Despatch: By end of February 2017
    •  
    • £16.99

Perovskia atriplicifolia (Large Plant)

Russian Sage

Russian Sage are a very hardy perennial plant that is both heat and drought tolerant. The grey green foliage is aromatic when lightly crushed and the lavender coloured flowers appear in profusion in summer. Perovskia atriplicifolia is very easy to keep, and can be grown in almost all soil types although preferring a well drained position in the full sun. Ideal at the back of a border where it's colouring will help set off its own blooms and that of other plants around it. Height: 150cm (59"). Spread 100cm (39")

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3.6 litre potted perovskia plant

    • Despatch:
    •  
    • £11.99
    • Out of stock
    • 2 x 3.6 litre potted perovskia plants

    • Despatch:
    •  
    • £17.99
    • Out of stock