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 10 products.
 

Eryngium planum 'Blue Hobbit' (Large Plant)

Sea Holly, Blue Eryngo

Eryngium are handy little plants for the border, as they’ll grow in many different types of soil, and the flower power of Eryngium ‘Little Hobbit’ is second to none!

Eryngium ‘Blue Hobbit’ is a unique, dwarf Eryngium, which can be grown in a patio pot. The 30cm (12") plants become top-heavy in midsummer, with sprays of nearly 100 inky-blue flowers. Height and Spread: 30cm (12").

 

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

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

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

Poppy 'Royal Wedding' (Large Plant)

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").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 8cm potted poppy plant

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

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

Wallflower 'Winter Party'

Erysimum, Cheiranthus

The richly fragrant blooms of Wallflower 'Winter Party' create a tapestry of colour in shades of burnt orange and mauve. This evergreen erysimum hybrid has a neat, compact habit making it perfect for beds, 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 June 2016
    •  
    • £14.99
    • 12 wallflower jumbo plug plants

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

Eryngium 'Neptune's Gold'

Sea Holly

The plant everyone's talking about! Eryingium 'Neptune's Gold' is the kind of breeding breakthrough that doesn't come along every day; a true colour break - the world's first golden Sea Holly! Selected in Wales from a batch of seedlings, this unique specimen still retains the iconic blue flower tones of Eryngium, but also takes on a stunning golden sheen - just like Neptune's crown! This superb perennial was Voted Best New Product at the recent Grower of the Year awards 2015. Height: 50cm (20"). Spread: 40cm (16").
More info
    • 1 x 9cm potted eryngium plant

    • Despatch: By end of June 2016
    •  
    • £12.99
    • 2 x 9cm potted eryngium plants

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

Allium 'Gladiator' (Large Plant)

Ornamental Onion

Hundreds of starry purple blooms with delicate silvery tips form these incredible allium flower heads. The magnificent, spherical blooms of Allium ‘Gladiator’ are up to 15cm (6") across! Flowering only once in a season, the blooms are followed by skeletal seedheads for a spectacular autumn display. Undemanding and easy to grow, these purple alliums are guaranteed to add the ‘wow’ factor to borders and cut flower arrangements. Height: 120cm (48"). Spread: 15cm (6").

 

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

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

    • Despatch:
    •  
    • £16.99
    • Out of stock

Allium 'Globemaster' (Large Plant)

Ornamental Onion

Hundreds of starry lilac-purple blooms form the incredible flower heads of this RHS AGM variety. The magnificent, spherical blooms of Allium ‘Globemaster’ are up to 15cm (6") across! Flowering only once in a season, the blooms are followed by skeletal seedheads for a spectacular autumn display. Undemanding and easy to grow, these purple alliums are guaranteed to add the ‘wow’ factor to borders and cut flower arrangements. Height: 80cm (31"). Spread: 15cm (6").

 

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

    • Despatch: By end of May 2016
    •  
    • £12.99
    • 2 x 3 litre potted allium plants

    • Despatch: By end of May 2016
    •  
    • £22.99

Allium stipitatum 'Mount Everest' (Large Plant)

Ornamental Onion

Allium bulbs are very easy to grow, and will look after themselves in the garden. Allium ‘Mount Everest’ produces globes of more than 50 star-shaped blooms during June, just after the spring bulbs, but before the summer bedding comes into flower.

Allium are ideal for dry gardens, and there is no need to lift the bulbs at the end of the season, as they are fully hardy. You will be amazed at how beautiful these flowers can be, for the minimum of effort! Height: 1.2m (3.9’). Spread: 15cm (6").

 

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

    • Despatch: By end of May 2016
    •  
    • £10.99
    • 2 x 3 litre potted allium plants

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

Poppy 'Beauty of Livermere' (Large Plant)

Papaver orientale, Oriental Poppy

Bright red blooms with black centre markings create a boisterous display that will certainly grab the limelight! The solitary papery blooms of Poppy 'Beauty of Livermere' perch on slender, hairy stems that sway above neat clumps of downy foliage. Although the flowers are relatively short-lived, this hardy Oriental Poppy brings late summer interest to borders with its large pepper pot seedheads. This well known variety is a must have for cottage garden borders and wildlife areas where it will attract plenty of pollinating insects. Height: 90cm (35"). Spread: 60cm (24").

 

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

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

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

Poppy 'Fruit Punch' (Large Plant)

Papaver orientale, Oriental Poppy

This T&M bred mix of Oriental Poppy bears enchanting, silky, ruffled blooms which stand above dark green clumps of foliage. A captivating blend of red, hot pink, bright orange and plum, with each bloom hosting a distinctive deep black centre. The fading blooms give way to an attractive display of large pepper pot seedheads which prolong its season of interest. Poppy 'Fruit Punch' makes a memorable display in borders, attracting attention from pollinating insects and florists in equal measure! Height: 75cm (30"). Spread: 50cm (20").

 

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

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

    • Despatch:
    •  
    • £14.99
    • Out of stock