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 30 products.
 

Heuchera 'Obsidian' (Large Plant)

This striking Coral Flower makes a bold statement. Fine sprays of creamy white flowers stand out against the glossy, deep maroon-black foliage. The nectar rich flowers of Heuchera 'Obsidian' attract pollinating insects and bring a light, airy feel to cut flower arrangements. This hardy evergreen perennial retains its elegant looks all year round, making it particularly useful for ground cover when planted en-masse. Perfect for individual patio pots or creating a sophisticated 'Black-tie' look in borders. Height: 45cm (18"). Spread: 30cm (12").

 

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

    • Despatch: Within 28 days
    •  
    • £9.99
    • 2 x 1 litre potted heuchera plants

    • Despatch: Within 28 days
    •  
    • £17.99

Wallflower 'Dwarf Scented Mixed'

Erysimum, Cheiranthus

Sometimes the old methods are the best, and that's exactly why we've added good, old fashioned bareroot wallflower plants to our range. Wallflower 'Dwarf scented Mixed' can be planted straight out into beds, containers and borders to create a fantastic tapestry of scented colour in the following spring. Tough, compact and reliable - this short lived perennial is tough enough to cope in even the poorest of soils. Height: 40cm (16"). Spread: 30cm (12"). More info
    • 20 bare root wallflower plants

    • Despatch: By end of October 2016
    •  
    • £7.99
    • 40 bare root wallflower plants

    • Despatch: By end of October 2016
    •  
    • £12.99

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").

 

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

    • Despatch: By end of January 2017
    •  
    • £9.99
    • 1 x 2 litre potted lobelia plant

    • Despatch: Within 28 days
    •  
    • £12.99
    • 2 x 1 litre potted lobelia plants

    • Despatch: By end of January 2017
    •  
    • £14.99
    • 2 x 2 litre potted lobelia plants

    • Despatch: Within 28 days
    •  
    • £19.99

Wallflower 'Perfect Perfume Mixed'

Erysimum, Cheiranthus

Deeply perfumed Erysimum flowers in a vibrant range of colours! With a neat, branching habit, Wallflower 'Perfect Perfume Mixed' are ideal for filling your spring borders and containers. Versatile and undemanding, this short lived perennial tends to be grown as a biennial, and is tough enough to cope in even the poorest of soils. Height and spread: 30cm (12"). More info
    • 6 wallflower jumbo plug plants

    • Despatch: By end of October 2016
    •  
    • £14.99
    • 12 wallflower jumbo plug plants

    • Despatch: By end of October 2016
    • SAVE *£9.99  
    • £29.98 £19.99

Pansy 'Ballerina'

Viola x wittrockiana

Unusual frilly tutu-like flowers of Pansy 'Ballerina' create a bright carnival of colour throughout the summer. The delicately ruffled petals make a stunning display in containers, beds and borders. Perfect for planting in window boxes where you can enjoy their pretty blooms close up. Height and spread: 23cm (9").

 

Culinary note: Pansy flowers are edible.

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.

More info
    • 36 pansy plug plants

    • Despatch: By end of October 2016
    •  
    • £9.99
    • 72 pansy plug plants

    • Despatch: By end of October 2016
    • SAVE *£4.99  
    • £19.98 £14.99

Morina longifolia (Large Plant)

This handsome evergreen perennial forms basal rosettes of attractive, glossy foliage with spiny margins and a lovely citrus aroma. From midsummer, Morina longifolia bears imposing, upright stems that are tiered with whorls of white, waxy flowers. As the blooms are pollinated they turn to pink, and eventually red, so that one single stem may carry three different colours for you to admire. The whorlflower is a fascinating specimen for perennial borders and makes a pleasing cut flower too. Height: 90cm (36"). Spread: 30cm (12").

 

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

    • Despatch: By end of January 2017
    •  
    • £9.99
    • 2 x 1 litre potted morina plants

    • Despatch: By end of January 2017
    •  
    • £14.99

Dianthus 'Crimson Rim'

Carnation

  • At last - a new carnation with a traditional fragrance

This stunning hardy Carnation bucks the modern trend for flashy flower colours at the expense of their fragrance. Dianthus 'Crimson Rim' combines elegant pristine white blooms with a stylish raspberry edge and a wonderful rich clove fragrance. This clump forming perennial is undemanding and well behaved making it perfect for the front of borders. And with a such a free flowering habit you'll have plenty of stems to spare for a vase indoors. Height: 40cm (16"). Spread: 30cm (12").


Culinary note: Use the clove like tasting petals for adding to cakes, either for flavour or decorating, suitable for soups, salads and sauces too. For more details about edible flowers click here.

 

More info
    • 5 dianthus jumbo plug plants

    • Despatch: By end of October 2016
    • save £4  
    • £11.99 £7.99
    • 10 dianthus jumbo plug plants

    • Despatch: By end of October 2016
    • save £5  
    • £17.99 £12.99
    • 20 dianthus jumbo plug plants

    • Despatch: By end of October 2016
    • SAVE £5  
    • £24.99 £19.99

Pansy 'Tea Party'

Viola x wittrockiana

These cheery little pansies will certainly brighten up the garden. Pansy 'Tea Party' Mixed is a vibrant blend of solid colours and bicolours with plenty of personality. Low maintenance and easy to grow, this free-flowering mix is ideal for filling beds, borders and containers with fabulous summer colour. Height: 23cm (9"). Spread: 30cm (12").

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.

More info
    • 36 pansy plug plants

    • Despatch:
    •  
    • £12.99
    • Out of stock
    • 72 pansy plug plants

    • Despatch:
    • SAVE *£7.99  
    • £25.98 £17.99
    • Out of stock

Mazus reptans

  • Try a new ground cover idea
This low growing, matt-forming perennial is perfect for filling gaps between stepping stones or at the front of sheltered borders and rockeries. The spreading foliage of Mazus reptans forms a dense carpet that is covered in pretty lilac-blue flowers with a yellow-spotted lower lip. This hardy, ground cover alpine has a long flowering period from late spring to July. Height: 5cm (2"). Spread: 30cm (12").
More info
    • 5 mazus jumbo plug plants

    • Despatch: By end of October 2016
    •  
    • £14.99
    • 10 mazus jumbo plug plants

    • Despatch: By end of October 2016
    • SAVE *£9.99  
    • £29.98 £19.99

Dianthus barbatus 'Mixed'

A cottage garden favourite with the sweetest perfume! Clusters of flowers in shades of white, pink and mauve are produced in summer on stiff upright stems. The fragrant blooms of Sweet William 'Messenger' are particularly attractive to bees and make a superb cut flower for a vase indoors. Often grown as a biennial, this short lived perennial is ideal for cottage garden borders, beds and containers. Height: 60cm (24"). Spread: 30cm (12").

Culinary note: Use the clove like tasting petals for adding to cakes, either for flavour or decorating, suitable for soups, salads and sauces too. For more details about edible flowers click here.

 

Buy this variety in a larger plant size
More info
    • 72 dianthus plug plants

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

Geranium 'Black Rose'

Pelargonium, Rosebud Geranium

The full, rounded buds of Rosebud Geranium 'Black Rose' resemble dainty roses when they first break open, then cluster together to form a pretty posy. This vigorous, trailing variety has the exceptional garden performance of other ivy-leaf geraniums, but their unique flower form truly sets them apart. With regular deadheading, they will spill from windowboxes, containers, and hanging baskets, blooming profusely throughout the summer. Trails to: 45cm (18").
Although technically perennial, Pelargoniums are only half hardy and therefore normally treated as annuals in the UK. However, with care, they may be overwintered in a frost free greenhouse.
More info
    • 5 geranium jumbo plug plants

    • Despatch: By end of March 2017
    •  
    • £9.99
    • 10 geranium jumbo plug plants

    • Despatch: By end of March 2017
    • SAVE *£2.99  
    • £19.98 £16.99

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").

 

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

    • Despatch: Within 28 days
    •  
    • £9.99
    • 2 x 1 litre potted lychnis plants

    • Despatch: Within 28 days
    •  
    • £14.99