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 22 products.
 

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

Pachysandra terminalis 'Green Carpet' (Large Plant)

Pachysandra terminalis 'Green Carpet' is an excellent plant for creating a carpet of green beneath trees and shrubs. Plants are mat-forming, and excellent at stopping weeds from taking hold. The evergreen foliage is textured, decorative and plays host to spikes of misty white flowers from early summer.

Easy to grow ground cover for awkward, shady borders, Pachysandra is the perfect choice for low-maintenance gardening. Plants stay low at just 15cm (6") and are ideal for small, oddly-shaped areas, edgings or patio containers. Height: 15cm (6"). Spread: up to 1m (39").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 9cm potted pachysandra plant

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

    • Despatch:
    •  
    • £16.99
    • Out of stock

Lobelia cardinalis 'Queen Victoria' (Large Plant)

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").

 

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

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

    • Despatch: By end of August 2016
    •  
    • £12.99
    • 2 x 1 litre potted lobelia plants

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

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

Gunnera manicata (Large Plant)

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 August 2016
    •  
    • £9.99
    • 1 x 18 litre potted gunnera plants

    • Despatch:
    •  
    • £79.99
    • Out of stock
    • 1 x 5 litre potted gunnera plants

    • Despatch: By end of August 2016
    •  
    • £35.99
    • Out of stock
    • 2 x 1 litre potted gunnera plants

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

Rodgersia aesculifolia (Large Plant)

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: By end of August 2016
    •  
    • £9.99
    • 2 x 1 litre potted rodgersia aesculifolia plants

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

Viola 'Teardrops' (Pre-Planted Basket)

viola

For hassle-free gardening, look no further than our pre-planted baskets for easy seasonal colour. We're always on the look out for ways to make life simpler for our gardening customers. So what could be easier hanging baskets which are already planted up? We've taken the hard work out of creating wonderfully colourful displays - just order our pre-planted baskets 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.

 

Garden ready pre-planted baskets
More info
    • 1 viola pre-planted basket with 6 plants

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

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:
    •  
    • £12.99
    • Out of stock
    • 2 x 3.5 litre potted astilbe plants

    • Despatch:
    •  
    • £19.99
    • Out of stock

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 October 2016
    •  
    • £12.99
    • 6 fragrant cowslip jumbo plug plants

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

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
More info
    • 1 x 1 litre potted lysimachia plant

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre potted lysimachia plants

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

Houttuynia cordata 'Chameleon' (Large Plant)

Houttuynia cordata 'Tricolor'

Houttuynia is a robust and versatile perennial. Plants are both moisture and drought tolerant, and will thrive in almost any position from sun to dappled shade.

The heart-shaped leaves of Houttuynia cordata 'Chameleon' are completely unique, with splashes of green, gold and red. When crushed, the foliage emits a pungent orange fragrance. Throughout mid-summer, the spreading stems are covered in pure white flowers. Houttuynia makes excellent ground cover through borders or around boggy pond margins. Height: 30cm (12"). Spread: 100cm (39").

 

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

    • Despatch: By end of August 2016
    •  
    • £10.99
    • 2 x 3.5 litre potted houttuynia plants

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

Mimulus x cultorum 'Major Bees' (Large Plant)

Diplacus, Monkey Flower, Musk

Mimulus are low growing, bushy plants, which are easy to grow, producing many orchid-like flowers from early summer. They love a moist soil, and can cope with waterlogging and growing at the edge of ponds.

Monkey Flowers can be grown in borders or in patio containers, and will flower for longer in a shady corner. Mimulus 'Major Bees' is a distinctive cultivar with golden-yellow, spotted flowers. Height and spread: 50cm (20").

 

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

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 2 x 1 litre potted mimulus plants

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

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").

 

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

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

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