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 10 products.
 

Euphorbia 'Ascot Rainbow'

Euphorbia x martini

  • Ideal for difficult dry gardens
  • Year-round interest
  • Vivid spring flowerheads

It’s hard to convey the myriad of colour changes this showy foliage plant goes through each season. Here goes! The strap-like stripy leaves emerge with an intense pink flush, maturing to grey-green with yellow margins and red markings. The plants also take on a pink tinge during the coldest parts of winter. This is all topped off in spring with a display of billowing flowerheads in vivid shades of green, yellow, cream and red. Height and spread: 90cm (36").
More info
    • 1 euphorbia jumbo plug plant

    • Despatch: By end of August 2016
    •  
    • £9.99
    • 3 euphorbia jumbo plug plants

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

Euphorbia characias 'Black Pearl' (Large Plant)

Milkweed, Spurge

A unique plant which gives all year round interest! Euphorbia are fully hardy, and will tolerate dry, sunny borders and periods of drought. Plants are evergreen and architectural, and possibly offer the longest flowering period of any garden plant. The unique black and green flowers of Euphorbia characias 'Black Pearl' are full of sweet nectar, and open in spring, and stay in place until the first frosts. Euphorbia will thrive in dry gardens, Mediterranean-style plantings and large patio pots. Height and Spread: 60cm (24").

 

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

    • Despatch: By end of September 2016
    •  
    • £7.99
    • 2 x 1 litre potted euphorbia plants

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

Euphorbia amygdaloides 'Ruby Glow' (Large Plant)

Milkweed, Spurge

This handsome evergreen perennial produces vivid bright green flower bracts that seemingly glow above ruby-red foliage. As the foliage ages it becomes near black throughout the cold winter months before producing a new flush of vibrant red leaves in spring. Euphorbia amygdaloides 'Ruby Glow' has a neat compact habit producing rounded, well branched plants that look magnificent grown in large swathes. A colourful choice for moist borders. Although this Spurge will happily tolerate light shade, it is best grown in full sun for the strongest colour. Height and spread: 45cm (18").

 

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

    • Despatch: By end of July 2016
    •  
    • £9.99
    • 2 x 2 litre potted euphorbia plants

    • Despatch: By end of July 2016
    •  
    • £17.99

Gunnera manicata (Large Plant)

Chilean Rhubarb

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 July 2016
    •  
    • £9.99
    • 1 x 18 litre potted gunnera plant

    • Despatch: By end of June 2016
    •  
    • £52.99
    • 1 x 5 litre potted gunnera plant

    • Despatch: By end of June 2016
    •  
    • £23.99
    • 2 x 1 litre potted gunnera plants

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

Euphorbia x martini 'Ascot Rainbow' (Large Plant)

Milkweed, Spurge

Evergreen blue-grey leaves edged with bright gold margins make a colourful display throughout the year. The vibrant foliage of Euphorbia x martinii 'Ascot Rainbow' takes on an attractive rosy pink tinge during colder weather and shows superb winter hardiness. In spring, this showy Spurge bears chartreuse green flowers towards the tip of each stem, each with a dark contrasting eye. This striking perennial makes a lovely addition to sunny borders, and once established, is particularly drought tolerant. Height and spread: 50cm (20").

 

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

    • Despatch: By end of July 2016
    •  
    • £13.99
    • 2 x 2 litre potted euphorbia plants

    • Despatch: By end of July 2016
    •  
    • £21.99

Festuca glauca (Large Plant)

Blue Fescue

Grown for its stiff, architectural blue foliage, the Blue Fescue is a useful evergreen grass for year round interest. From early summer, the foliage is complemented by short, blue-green flower spikes. This hardy little perennial looks quite at home in patio pots, rockeries, gravel gardens and borders, mixing nicely with perennials, alpines or even small shrubs. Festuca glauca has a particularly neat, clump forming habit that remains nicely compact as it grows. This hardy evergreen grass is easy to grow and virtually maintenance free. Height and spread: 30cm (12").

 

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

    • Despatch: By end of June 2016
    •  
    • £9.99
    • 2 x 1 litre potted festuca plants

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

Rudbeckia occidentalis 'Green Wizard' (Large Plant)

Western Coneflower

A curious and extraordinary perennial that is very different from the flashy colours of other rudbeckias. With no obvious petals, the bright green sepals of Rudbeckia 'Green Wizard' surround a black central cone. This tall variety creates an interesting spectacle for the back of borders in late summer and makes an unusual fresh cut flower that is long lasting in water, or can used in dried arrangements. Easy to grow, quickly forming a good sized plant with plenty of lush green foliage, and always a talking point. Height: 120cm (47"). Spread: 60cm (24").

 

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

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

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

Hellebore 'Lime Bicolour' (Large Plant)

Helleborus

Eye-catching double blooms with pale lime petals and cerise picotee edges bring a splash of spring colour to dull winter borders. Hellebore ‘Lime Bicolour’ is the essential low maintenance plant for any difficult, shady border where they will form clumps of leathery evergreen foliage for a year round garden presence. These resilient hardy perennials are vigorous and long lived, lasting for 20 years or more. Height and spread: 45cm (18"). More info
    • 1 x 3 litre potted hellebore plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 3 litre potted hellebore plants

    • Despatch:
    •  
    • £14.99
    • Out of stock

Red Hot Poker 'Traffic Lights' (Large Plant)

Kniphofia uvaria, Torch Lily

The playful colours of this dwarf red-hot poker are sure to stop you on your tracks! Unusual red, amber and green torch-like flower spikes are carried on sturdy stems above evergreen strappy foliage. This tough and reliable perennial is perfect for low maintenance borders and makes an impressive cut flower too! Height and Spread: 45cm (18").

 

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

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

    • Despatch:
    •  
    • £14.99
    • Out of stock

Euphorbia 'Rudolph'

Milkweed, Spurge

A striking Euphorbia x martini cultivar which forms a mound of evergreen, dark-green foliage, topped with chartreuse green flowers in spring. Euphorbia 'Rudolph' earns its name from the bright red shoot tips that develop as winter takes hold, making this perennial stand out among winter borders. This attractive Spurge makes a lovely addition to sunny borders, and once established, is particularly drought tolerant. Height and spread: 60cm (24”). More info
    • 3 euphorbia jumbo plug plants

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 6 euphorbia jumbo plug plants

    • Despatch:
    •  
    • £17.99
    • Out of stock