Thompson & Morgan

Important delivery notice
The products on this site are only delivered to UK addresses. If you require delivery to another country please visit one of our other sites below.

Refine Results

Refine by..

Email Newsletter

Sign up to our newsletter

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 21 products.
 

Lobelia cardinalis 'Queen Victoria' (Large Plant)

Cardinal Flower, Lobelia fulgens, Lobelia splendens

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"). More info
    • 1 x 1 litre potted lobelia plant

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

    • Despatch: By end of September 2015
    •  
    • £12.99
    • 2 x 1 litre potted lobelia plants

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

    • Despatch: By end of September 2015
    •  
    • £19.99

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"). More info
    • 1 x 1 litre potted rodgersia aesculifolia plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 1 litre potted rodgersia aesculifolia plants

    • Despatch: By end of September 2015
    •  
    • £16.99

Astilbe japonica 'Montgomery' (Large Plant)

False Goatsbeard

Astilbe japonica 'Montgomery' has deep, scarlet-red plumes from early summer, set against bronze-green foliage. These hardy perennials grow well in sun or shade, and are ideal for cottage garden borders or patio pots. If you're looking for a plant for a damp, shady corner that can cope with soil that may be waterlogged occasionally, then make Astilbe your choice. Astilbe plants are bushy and easy to maintain, and are rabbit resistant. Height: 70cm (28"). Spread: 45cm (18").

More info
    • 1 x 1 litre potted astilbe plant

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

    • Despatch:
    •  
    • £16.99
    • Out of stock

Arum Lily (Large Plant)

Zantedeschia aethiopica, Calla Lily

Grow the classic Arum Lily in your own garden; plants are suitable for moist borders or large patio pots. The architectural foliage is joined by unusual hooded flowers, which are up to 15cm (6") in length.

Zantedeschia can be grown at the edge of ponds, or in soil that is consistently moist. The Arum Lily will flower from early summer, and is a hardy perennial in most areas of the UK. Height: 90cm (36"). Spread: 60cm (24").

More info
    • 1 x 3 litre potted arum lily plant

    • Despatch:
    •  
    • £11.99
    • Out of stock
    • 2 x 3 litre potted arum lily plants

    • Despatch:
    •  
    • £19.99
    • Out of stock

Lobelia x speciosa 'Fan Mixed' (Large Plant)

Lobelia x gerardii

Generally grown as a biennial, Lobelia x speciosa 'Fan Mixed' bears upright flower spikes of narrow-petalled flowers in shades of crimson, mauve and pink. Flowering from late summer into autumn, the blooms are perfectly complemented by the dark bronze-green foliage. This eye-catching Lobelia enjoys moist, even boggy conditions, making it a pleasing specimen for planting at a ponds edge or damp herbaceous borders. Height: 60cm (24"). Spread: 23cm (9"). More info
    • 1 x 1 litre potted lobelia plant

    • Despatch: By end of April 2016
    •  
    • £9.99
    • 2 x 1 litre potted lobelia plants

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

Lobelia x speciosa 'Fan Scarlet' (Large Plant)

Lobelia x gerardii

A particularly handsome colour selection from the ‘Fan’ series. The narrow-petalled, scarlet flower spikes are borne on well branched plants from late summer into autumn. Dark bronze-green foliage contrasts perfectly with the vibrant blooms and provides a rather exotic feel. Generally grown as a biennial, Lobelia x speciosa 'Fan Scarlet' enjoys a moist, somewhat boggy soil and looks superb planted at the edge of ponds and streams. Height: 60cm (24”). Spread: 23cm (9”). More info
    • 1 x 1 litre potted lobelia plant

    • Despatch: By end of April 2016
    •  
    • £9.99
    • 2 x 1 litre potted lobelia plants

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

Lychnis chalcedonica (Large Plant)

Maltese Cross, Jerusalem Cross

This stiff, upright perennial makes quite a show! Clusters of scarlet star-shaped flowers perch upon tall, stiff stems throughout midsummer, bringing height and vibrancy to the back of sunny borders. Lychnis chalcedonica enjoys a damp, boggy environment and makes a fine addition to bog gardens and the edge of ponds and streams. Commonly known as Maltese Cross, this hardy perennial also holds an RHS AGM. Height: 120cm (48”). Spread: 30cm (12”). More info
    • 1 x 1 litre potted lychnis plant

    • Despatch: By end of April 2016
    •  
    • £9.99
    • 2 x 1 litre potted lychnis plants

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

Lychnis viscaria 'Splendens Plena' (Large Plant)

Campion, Catchfly

This low growing Lychnis makes a colourful addition to moist rockeries, bog gardens and waterside plantings. Panicles of magenta pink blooms rise upon sticky, branchless stems in early summer, above clumps of narrow, linear foliage. Lychnis viscaria 'Splendens Plena' is an attractive yet under-used hardy perennial which also holds an RHS AGM for its garden performance. Height: 120cm (48"). Spread: 30cm (12"). More info
    • 1 x 1 litre potted lychnis plant

    • Despatch: By end of April 2016
    •  
    • £9.99
    • 2 x 1 litre potted lychnis plants

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

Lysimachia punctata (Large Plant)

Loosestrife

Bring some sunshine to your borders with this resilient cottage-garden favourite. Neat clumps of tall, elegant stems with striking yellow flowers are borne from mid-summer through until early autumn. Golden Lysimachia punctata is great for difficult clay soils and shadier parts of the garden, thriving in damp borders, bog gardens or at the margins of a pond. Grow dotted loosestrife in woodland gardens or informal areas for a burst of late summer colour! Height: 90cm (35"). Spread: 60cm (24"). More info
    • 1 x 1 litre potted lysimachia plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 1 litre potted lysimachia plants

    • Despatch: By end of September 2015
    •  
    • £14.99