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 20 products.
 

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").

 

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

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

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    • £16.99
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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").

 

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    • 2 x 3 litre potted arum lily plants

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    • £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").

 

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

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    • £9.99
    • Out of stock
    • 2 x 1 litre potted lobelia plants

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    • £14.99
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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").

 

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

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    • £9.99
    • Out of stock
    • 2 x 1 litre potted lobelia plants

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    • £14.99
    • Out of stock

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").

 

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

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    • £9.99
    • Out of stock
    • 2 x 1 litre potted lychnis plants

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    • £14.99
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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").

 

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

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

    • Despatch: By end of May 2016
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    • £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").

 

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

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    • £9.99
    • Out of stock
    • 2 x 1 litre potted lysimachia plants

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    • £14.99
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Waldsteinia ternata (Large Plant)

Siberian Waldsteinia

A groundcover semi-evergreen perennial that forms a dense mat of shiny purple-green leaves that somewhat resemble those of a strawberry. Waldsteinia ternate are shade loving plants and from early spring until late summer, small yellow saucer-shaped flowers appear. Uses vary from covering large or small areas as these plants spread steadily but are not considered invasive. Once established, Waldsteinia become drought tolerant and, if a mild winter is forecast, may remain evergreen too. Height: 10cm (4"). Spread: 100cm (39").

 

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    • 1 x 9cm potted waldsteinia plant

    • Despatch: By end of May 2016
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    • £7.99
    • 2 x 9cm potted waldsteinia plants

    • Despatch: By end of May 2016
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    • £11.99

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").

 

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

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

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    • £16.99
    • Out of stock

Viola 'Teardrops' (Pre-Planted Basket)

viola

For hassle-free gardening, look no further than our pre-planted pots for easy seasonal colour. We’re always on the lookout for ways to make life simpler for our gardening customers. So what could be easier than pots which are already planted up? We’ve taken the hard work out of creating wonderfully colourful displays - just order our pre-planted pots of your favourite varieties and position them where you’ll most enjoy their colour. Then all you need to do is water them and wait! Viola ‘Teardrops’ is one of our top performing hanging basket varieties, producing cascading trails of colourful blooms to brighten up the winter garden. Flowers just keep on coming and will continue to perform well into May – Four months of colour and all you need to do is hang the baskets in place and keep them watered. Height 15cm (6"). Spread: 20cm (8").,

Culinary note: Some parts of these flowers are edible. The crystallised petals are great decorations for cakes and cookies, or they can be added straight to green salads for an injection of colour. For more details about edible flowers click here.

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    • 1 viola pre-planted basket with 6 plants

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    • £17.99 £6.99
    • Out of stock