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. Use the selections in the left menu to select the right plants for your garden.


For beautiful summer flowers browse our range of annual plants.



We have found 34 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 May 2016
    •  
    • £12.99
    • 6 fragrant cowslip jumbo plug plants

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

Iris ensata 'Collection'

Japanese Iris, Iris kaempferi

Spectacular, exotic blooms are carried above narrow, strap-like foliage in summer. Iris ensata enjoy a reliably moist soil and positively thrive in bog gardens or at the margins of a pond or stream. The long stems of these low maintenance perennials also make them ideal for cutting for an eye-catching vase indoors. Height: 90cm (36"). Spread: 30cm (12"). More info
    • 4 bare root Iris plants

    • Despatch: By end of May 2016
    •  
    • £13.99
    • 8 bare root Iris plants

    • Despatch: By end of May 2016
    • SAVE £8.99  
    • £27.98 £18.99

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 May 2016
    •  
    • £13.99
    • 2 x 2 litre potted hosta plants

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

Gunnera manicata (Large Plant)

Chilean Rhubarb

Gunnera is the 'big daddy' of the gardening world. The giant evergreen leaves can reach 1-2 metres across, and will add the wow factor to any garden, although isn't necessarily suitable for smaller gardens!

Also affectionately known as Giant Rhubarb, Gunnera is robust, spectacular and architectural. They make great specimen plants bog gardens and waterlogged spots, the reflection in water is especially beautiful. Gunnera manicata holds an RHS Award of Garden Merit too. Height: 2.5m (8') Spread: 4m (13').

 

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

    • Despatch: By end of July 2016
    •  
    • £9.99
    • 1 x 18 litre potted gunnera plant

    • Despatch: By end of May 2016
    •  
    • £52.99
    • 1 x 5 litre potted gunnera plant

    • Despatch: By end of May 2016
    •  
    • £23.99
    • 2 x 1 litre potted gunnera plants

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

Ligularia dentata 'Midnight Lady' (Large Plant)

Are you looking for a statement plant for your border? Ligularia dentata ‘Midnight Lady’ is the perfect choice. Giant, architectural foliage in deep bronze, with golden-orange daisy flowers on dark stems.

Ligularia plants can be grown in reliably moist soil, making them ideal for those damp, shady corners and spectacular waterside plants. Ligularia are deer and rabbit resistant, yet adored by bees and butterflies. Height: 1m (39"). Spread: 75cm (30").

 

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

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 1 litre potted ligularia plants

    • Despatch:
    •  
    • £16.99
    • Out of stock

Rodgersia aesculifolia (Large Plant)

Chestnut-leaved rodgersia

A robust plant for growing in the edge of ponds, or for moist, waterlogged borders. Rodgersia plants are highly exotic-looking, and carry large leaves that look very similar to the foliage of the horse chestnut tree! Rodgersia aesculifolia is clump-forming, and the large leaves joined by spikes of pink-flushed blooms on 2 foot stems. A border full of Rodgersia, Hosta and Ferns is a joy to behold! Height: 2m (6.6') Spread: 1m (39").

 

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

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 1 litre potted rodgersia aesculifolia plants

    • Despatch:
    •  
    • £16.99
    • Out of stock

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 May 2016
    •  
    • £13.99
    • 2 x 2 litre potted hosta plants

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

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

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

Astilbe japonica 'Washington' (Large Plant)

False Goatsbeard

Astilbe are long-lived perennials, which are excellent for moist, shady corners in sun or dappled shade. ‘Washington’ is a particularly choice Astilbe, with pure white plumes, which appear from early summer. Plants are very rabbit resistant, and attractive to a range of different butterflies.

Astilbe are an excellent plant for cottage garden borders, or can be grown in containers for summer colour. Ensure soil is moist at all times. Height: and Spread: 50cm (19").

 

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

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 1 x 3.5 litre potted astilbe plant

    • Despatch: By end of May 2016
    •  
    • £12.99
    • 2 x 1 litre potted astilbe plants

    • Despatch:
    •  
    • £16.99
    • Out of stock
    • 2 x 3.5 litre potted astilbe plants

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