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.
 

Giant Fragrant Cowslip

Primula florindae, Tibetan Cowslip

Stiff stems carry whorls of sulphur yellow, tubular, flowers with a delicate, sweet fragrance. Once established, Giant Cowslips will naturalise to form swathes of lush, mid green foliage that makes ideal groundcover for natural planting schemes. With an RHS AGM, Primula florindae makes a superb choice for a damp, shady corner where other plants won't grow. Height: 90cm (35"). Spread: 50cm (20").,

Culinary note: Some parts of these flowers are edible. Try the sweet tasting petals on top of salads or even pancakes, crystallise them for use as cake decorations too. For more details about edible flowers click here.

More info
    • 3 fragrant cowslip jumbo plug plants

    • Despatch: By end of September 2016
    •  
    • £12.99
    • 6 fragrant cowslip jumbo plug plants

    • Despatch: By end of September 2016
    • SAVE *£7.99  
    • £25.98 £17.99

Astilbe x arendsii 'Look at Me'

False Goatsbeard

Turn any dark, damp corner of the garden into a focal point with this stunning Astilbe. The bubble-gum pink flower plumes and vivid ruby-red stems of Astilbe 'Look At me' virtually shout for your attention. This easy-grow perennial will thrive in soil too wet for many garden plants, but you don't have to tuck it out of site. This star perennial is also a top performer in patio pots when kept shaded and well watered. Voted Best New Plant when launched to the industry at the 2013 European Plantarium trade fair - we now have stock to meet consumer demand for this sought after perennial plant. Height: 45cm (18"). Spread: 50cm (20"). More info
    • 3 bare root astilbe plants

    • Despatch: By end of November 2016
    •  
    • £9.99
    • 6 bare root astilbe plants

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

Trollius 'Dancing Flame'

Add some heat to your border this autumn with Trollius 'Dancing Flame'. This Globeflower has everything you'd want from a border perennial; contained vigour, long flowering habit, care-free attitude, and years of garden performance! The glorious orange blooms just keep on coming right though early summer for 8 weeks of vibrant colour. This hardy herbaceous perennial thrives in moist soils but will cope with drought conditions once established. Height: 60cm (24"). Spread: 50cm (20"). More info
    • 1 x 9cm potted trollius plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 9cm potted trollius plants

    • Despatch:
    •  
    • £16.99
    • Out of stock

Astilbe japonica 'Elisabeth van Veen' (Large Plant)

False Goatsbeard

Astilbe can be the perfect choice for damp, shady corners on soil that may be waterlogged from time to time. Plants are bushy and easy to maintain. 'Elisabeth van Veen' has beautiful, raspberry-purple plumes from early summer.

Astilbe can grow in sun as well as dappled shade, and make an excellent addition to mixed cottage garden borders, or can be grown as a patio plant for summer colour. Height: and Spread: 50cm (19").

 

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

    • Despatch: By end of July 2016
    •  
    • £12.99
    • 2 x 3.5 litre potted astilbe plants

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

Hosta 'Fragrant Blue' (Large Plant)

Plantain Lily

This is a particularly eye-catching variety with chalky-blue foliage that retains its colour throughout the season. From July to August, the delicately scented, mauve pink flowers offer the perfect complement to the heart shaped foliage. In moist soils, this low growing hardy perennial forms dense ground cover. Hosta 'Fragrant Blue' is perfect for the front of borders, woodland planting schemes, or in the damp soil at the edge of ponds. Height: 50cm (20"). Spread: 100cm (39").

 

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

    • Despatch: By end of July 2016
    •  
    • £13.99
    • 2 x 2 litre potted hosta plants

    • Despatch: By end of July 2016
    •  
    • £21.99

Hosta 'So Sweet' (Large Plant)

Plantain Lily

A compact variegated variety forming neat clumps of glossy mid-green foliage with pale yellow margins. From July to August, the funnel shaped blooms appear on short stems above the foliage. As the name suggests, the lilac-white flowers of Hosta 'So Sweet' are deeply fragrant. A lovely choice for a prominent spot at the front of moist borders. Unlike some variegated forms, Hosta 'So Sweet' will tolerate some sun. Height: 35cm (14"). Spread: 55cm (22").

 

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

    • Despatch: By end of July 2016
    •  
    • £13.99
    • 2 x 2 litre potted hosta plants

    • Despatch: By end of July 2016
    •  
    • £21.99

Hosta 'Wide Brim' (Large Plant)

Plantain Lily

A well known variety that holds an RHS AGM for its garden performance. Hosta 'Wide brim' has heavily puckered, variegated foliage with deep green centres and pale gold margins. Lilac blue, funnel shaped flowers appear on tall stems throughout July. This clump forming perennial has an attractive mounding habit that creates a dense, rounded plant over time. A popular choice for a shaded position. Height: 45cm (18"). Spread: 100cm (39").

 

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

    • Despatch: By end of July 2016
    •  
    • £13.99
    • 2 x 2 litre potted hosta plants

    • Despatch: By end of July 2016
    •  
    • £21.99

Hosta 'Great Expectations' (Large Plant)

Plantain Lily

A lovely cultivar with thick, variegated leaves that have a naturally stiff habit. The heart shaped foliage is yellow, fading to white towards the centre of each leaf, with irregular blue green margins. From June to July, Hosta 'Great Expectations' produces white, bell shaped flowers above the foliage. Although slow growing, this superb variety is well worth the wait and proves to be reasonably slug resistant. Height: 70cm (27"). Spread: 120cm (48").

 

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

    • Despatch: By end of July 2016
    •  
    • £13.99
    • 2 x 2 litre potted hosta plants

    • Despatch: By end of July 2016
    •  
    • £21.99

Hosta 'Francee' (Large Plant)

Hosta fortunei, Plantain Lily

Hosta 'Francee' is a tough, weatherproof variety with foliage that is deeply ribbed and edged in jagged, cream margins. When protected from slugs, this vigorous hardy plant will quickly form clumps of foliage that can light up a shady spot.

In mid summer, this RHS Award of Garden Merit variety produces attractive flower spikes that stand above the foliage. Hostas are recommended for borders, woodland gardens and patio pots, thriving in shade. Height: 55cm (22"). Spread: 100cm (39").

 

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

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

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

Hosta undulata var. undulata (Large Plant)

Hosta 'Mediovariegata', Hosta 'Argentea Variegata', Plantain Lily

Hosta undulata var. undulata gives funnel shaped, lavender blue flowers on tall spikes, which are held above the neat, weatherproof clumps of foliage. The bright green leaves have a curious, twisted growth habit which gives them a fascinating appearance.

Hosta undulata var. undulata is an RHS AGM variety, which makes a fabulous addition to borders, woodland gardens and patio containers, producing the best colour in a shady position. Height: 100cm (39"). Spread: 45cm (18").

 

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

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

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

Hosta sieboldiana var. elegans (Large Plant)

Plantain Lily

Hostas are easy to grow ground cover for shady borders or for growing on pots on shaded patios. Hosta sieboldiana var. elegans is an RHS Award of Garden Merit holder, which is strong-growing, clump-forming. Hosta plants will thrive in moist, damp, dark borders, or difficult, dry shady borders.

The Giant Blue Hosta has architectural, blue-green foliage, which is great for the shaded end of cottage garden borders. In the summer, the robust growth plays host to pale lilac, bell-shaped flowers appear on stems held above the foliage. Height: 100cm (39"). Spread: 120cm (48").

 

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

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

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

Lythrum salicaria 'Robin' (Large Plant)

Purple Loosestrife

Purple Loosestrife is an easy to grow, hardy perennial for moist borders in full sun. Lythrum salicaria 'Robin' can be extremely long-flowering, with upright flower spikes from late spring to late summer.

Lythrum plants are showy and robust, with magenta pink flowers and are excellent for cottage garden borders. They offer unrivalled summer colour. Height: 90cm (36"). Spread: 45cm (18").

 

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

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

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