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 40 products.
 

Phlox Collection (Creeping)

Phlox subulata, Moss Phlox

 Customer Rating
  • Fragrant ground cover
  • Flowers late spring
  • Attracts bees and butterflies
Groundcover needn't be dull! Carpet your garden in rich colour and keep the weeds at bay with our perennial creeping phlox collection. This hardy rockery plant has many uses – underplant trees, shrubs and tall perennials, soften path edging or cover awkward slopes and banks. If you're tired of your lawn, why not replace it with a sea of seasonal colour. This collection comes into its own in March to May, bridging the colour gap between winter and summer bedding. Height: 15cm (6"). Spread: 50cm (20").
  • Collection comprises:
  • Phlox subulata 'Candy Stripes'
  • Phlox subulata 'Snowflake'
  • Phlox subulata 'Red Wings'
  • Phlox subulata 'Drummonds Pink'
  • Phlox subulata 'Emerald Cushion'
More info
    • 5 phlox Postiplug plants

    • Despatch: By end of October 2016
    •  
    • £13.99
    • 10 phlox Postiplug plants

    • Despatch: By end of October 2016
    • SAVE *£7.99  
    • £27.98 £19.99
    • 20 phlox Postiplug plants

    • Despatch: By end of October 2016
    • SAVE *£30.97  
    • £55.96 £24.99
    • 50 phlox Postiplug plants

    • Despatch: By end of October 2016
    • SAVE *£99.91  
    • £139.90 £39.99

Iberis sempervirens (Large Plant)

Sprays of white, fragrant blooms smother the evergreen foliage of this Candytuft. Iberis sempervirens thrives in poor soils making this RHS AGM variety particularly useful for ground cover in rockeries and on top of walls. This shrubby perennial is equally at home in the front of borders where it will attract beneficial insects to its scented flowers. Height: 30cm (12"). Spread: 50cm (20").

 

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

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

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

Phlox 'Bavaria'

Creeping Phlox are useful for dry, sunny spots and parched ground where other plants just won't grow! Once established, Phlox 'Bavaria' will thrive in the driest of soils, producing an impenetrable mat of fragrant flowers, suppressing weeds and resisting drought! The detailed eye on each gleaming white flower sets this stunning, evergreen drought tolerant perennial apart from the crowd. Height: 15cm (6"). Spread: 50cm (20").
More info
    • 5 phlox jumbo plug plants

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 10 phlox jumbo plug plants

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

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

Agapanthus 'Twister'

African Blue Lily

  • Stunning Bicolour flowers
  • Perfect for striking patio displays
  • Mid to Late Summer Flowering
Here's a plant that will stand out from the crowd in your garden - the first ever deciduous bicolour Agapanthus. This African lily is robust, and truly hardy in the UK meaning it's perfect in the garden border as well as in a patio container. The flowers of Agapanthus 'Twister' are absolutely glorious, with crystal white flutes turning inky blue at the tips. The huge globes of colour appear from mid to late summer, hosted on strong, sturdy stems that need no staking. Height: 60cm (24"). Spread: 50cm (20").

Why not add a patio pot to your order? - perfect for planting up your Agapanthus plants!
More info
    • 1 x 9cm potted agapanthus plant

    • Despatch: By end of September 2016
    •  
    • £13.99
    • 2 x 9cm potted agapanthus plants

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

Berkheya purpurea

Purple Sunflower, South African Thistle

  • The thistle that thinks it’s a sunflower!
  • Unusual border flower
  • Excellent dried cut flower

Nicknamed the 'purple sunflower', this shining beauty makes a fantastic border plant, producing a neat, ground-hugging rosette of thistle-like foliage and a striking flower stem that demands attention in any planting display. The gently prickled leaves make it a good plant to discourage pets and other unwanted visitors away from your prized borders!

Like many other South African species, Berkheya plants are very undemanding, simply requiring a sunny spot on free draining soil. Multiple flowers appear in late summer in a silvery shade of soft violet, creating a real wow factor. The stems make unusual fresh or dried cutflowers. Best planted under a south-facing wall and given some winter frost protection in colder parts of the UK. Height: 75cm (30"). Spread: 50cm (20").

More info
    • 5 x berkheya Postiplugs plants

    • Despatch: By end of September 2016
    •  
    • £9.99 £4.99
    • 10 x berkheya Postiplugs plants

    • Despatch: By end of September 2016
    •  
    • £14.99 £7.49
    • 20 x berkheya Postiplugs plants

    • Despatch: By end of September 2016
    •  
    • £19.99 £9.99

Agapanthus 'Jacaranda' (Large Plant)

Agapanthus 'Jacaranda' is a particularly early flowering variety. Blooming from as early as June, the showy umbels of blue flowers are beautifully striped with deeper blue. This African Blue Lily adds a dramatic vertical presence to herbaceous borders, where its sturdy upright stems will rise to create a lovely focal point. The linear, evergreen foliage forms neat clumps that make good ground cover when planted in large swathes. This reliable hardy perennial copes in most soils, and enjoys a sunny spot. Height: 90cm (36"). Spread: 50cm (20").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3 litre potted agapanthus plant

    • Despatch: By end of September 2016
    •  
    • £17.99
    • 2 x 3 litre potted agapanthus plants

    • Despatch: By end of September 2016
    •  
    • £27.99

Meconopsis grandis 'Lingholm' (Large Plant)

Himalayan Blue Poppy

This captivating short lived perennial is a 'must have'! From basal rosettes of hairy leaves rise tall stems bearing spectacular, single clear blue poppy flowers, up to 10cm (4") across. Meconopsis 'Lingholm' makes a stunning feature planted en masse in woodlands, and moist, shady borders. Height: 75cm (30"). Spread: 50cm (20").

 

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

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

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

Geum 'Blazing Sunset'

Avens

 Customer Rating
Fully double, scarlet red Geum flowers rise above clumps of foliage on thin, wiry stems. Geum 'Blazing Sunset' adds a bright splash of colour to borders - the large flowers make a dazzling and unusual addition to cut flower arrangements too. These colourful hardy perennials are so easy to grow that we can't understand why they're not more commonly grown! Height and spread: 60cm (24").
More info
    • 6 geum plug plants

    • Despatch: By end of September 2016
    •  
    • £5.99

Lupin 'Russell Hybrids Mixed' (Large Plant)

Lupinus

Tall spires of tightly packed flowers rise above clumps of palmate foliage in a magical array of colours. This wonderful mix of the ever popular 'Russell Hybrids' is ideal for adding height and structure to the back of perennial borders and woodland edges. A distinctive hardy perennial that remains a cottage garden favourite. Height: 90cm (36"). Spread: 50cm (20").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 2 litre potted lupin plant

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

    • Despatch: By end of September 2016
    • SAVE *£2.99  
    • £19.98 £16.99

Lupin 'Russell Hybrids Mixed'

Lupinus

Tall spires of tightly packed flowers rise above clumps of palmate foliage in a magical array of colours. This wonderful mix of the ever popular 'Russell Hybrids' is ideal for adding height and structure to the back of perennial borders and woodland edges. A distinctive hardy perennial that remains a cottage garden favourite. Height: 90cm (36"). Spread: 50cm (20"). More info
    • 3 x 5cm potted lupin plants

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 6 x 5cm potted lupin plants

    • Despatch: By end of September 2016
    • SAVE *£6.99  
    • £19.98 £12.99

Poppy 'Royal Wedding'

Papaver orientale, Oriental Poppy

The Oriental Poppy is perfect for cottage gardens, and are best planted together in clumps for the full effect. Poppy 'Royal Wedding' is the pick of the bunch, with glistening white petals and a dark centre to each bloom. Bees and butterflies love the nectar-rich flowers. Oriental Poppies are easy to grow, hardy perennial plants for a sunny border in the garden. Plants are clump-forming, tough and produce over-sized flowers in early summer each year, followed by attractive seedheads. Height: 60cm (24"). Spread: 50cm (20"). More info
    • 1 x 8cm potted poppy plant

    • Despatch: By end of October 2016
    •  
    • £11.99
    • 2 x 8cm potted poppy plants

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