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 35 products.
 

Rudbeckia hirta 'Cherokee Sunset' (Garden Ready)

Coneflower, Black-eyed Susan

  • Enjoy the hot colours of rudbeckia, even when it's cool in your garden!
  • The fast-track to a hassle-free garden - just plant, water and enjoy!
  • Quality plants delivered to your door, hardened off and ready to plant out
  • Fully-grown, super-robust, healthy plants
Our garden ready plants are selected for garden performance, straight from the nursery. We send them to you 'green' ahead of flowering (but please note some varieties may show a few blooms), which means plants will establish quickly and all their energy goes into producing better roots, so they produce more flowers throughout the season.

As a result of over 10 years breeding and selection by T&Ms flower breeders, Rudbeckia Cherokee Sunset® was born. Never before has there been such a spectacular range of colours of fully double to semi-double Rudbeckia, with large 3-4in blooms. Shades of golden yellow, orange, bronze and mahogany make up this stunning blend that resembles the attractive colour spectrum of an Indian Sunset. Vigorous, free branching plants, with strong stems, which flower over a long period from mid summer to early autumn. Cherokee Sunset® is outstanding for adding height, colour and interest to beds, borders and large containers. Also makes an impressive cut flower. T&M are proud to be the first UK packet seed company to have an All American Selection Winning variety from its own breeding programme. This prestigious award is presented to varieties that have outstanding garden performance, quality blooms, a unique colour range and that show a significant improvement over existing varieties of the species.

 

Garden ready special offer
More info
    • 30 rudbeckia garden ready plants

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

Meconopsis grandis 'Lingholm'

Himalayan Blue Poppy

 Customer Rating
A perennial wow factor for a difficult, damp shady corner. I just love the indescribable blue colour of Meconopsis blooms; once seen, never forgotten! This specially selected strain acts as a perennial too, lasting in the garden for many years. Height: 75cm (30"). Spread: 50cm (20").
More info
    • 2 meconopsis jumbo plug plants

    • Despatch: By end of June 2016
    •  
    • £12.99
    • 4 meconopsis jumbo plug plants

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

Alstroemeria 'Rock 'n' Roll'

Peruvian Lily

  • Flowers until November
Ten years of breeding by Australia's leading specialists have produced this unusual new Alstromeria with amazing variegated foliage. This fantastic Peruvian Lily grows just as well in sun as in shade, with no burning of the creamy foliage. Alstroemeria 'Rock 'n' Roll' is super hardy, withstanding temperatures down to -10°C (14F). Perfect for borders and patios where it will flower continuously throughout summer, producing beautiful stems that are ideal for cutting. Height: 75cm (30"). Spread: 60cm (24").
More info
    • 1 alstroemeria jumbo plug plant

    • Despatch: By end of August 2016
    •  
    • £14.99
    • 3 alstroemeria jumbo plug plants

    • Despatch: By end of August 2016
    • SAVE £19.98  
    • £44.97 £24.99

Penstemon 'Blackberry'

Satin, bell-shaped flowers in a rich shade of purple smother the upright stems of this hardy perennial. From June onwards, the long-lasting flowers are produced above glossy, semi-evergreen foliage and continue their display well into autumn, long after most other summer perennials have faded. Penstemon 'Blackberry' is undemanding and easy to grow, tolerating almost any position in the garden, regardless of rain or drought, and even resisting slug damage! Height: 75cm (30"). Spread: 40cm (16").
More info
    • 3 penstemon jumbo plug plants

    • Despatch: By end of May 2016
    •  
    • £9.99

Alstroemeria 'Planet Mixed'

Peruvian Lily

  • Non-stop flowering from June to November
  • Best in class for alstroemeria
  • Order early for best results
Gain months of pleasure year after year with the astounding lily-like blooms of Alstroemeria 'Planet Mixed'. These hardy, compact perennials are so easy to grow; just perfect for adding a bright splash of late summer colour to cottage garden borders and patio containers. Alstroemeria flowers are excellent for cutting, so you can enjoy a few stems in a vase indoors too. Height: 75cm (30"). Spread: 60cm (24").
More info
    • 5 bare root alstroemeria plants

    • Despatch: By end of November 2016
    •  
    • £16.99
    • 10 bare root alstroemeria plants

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

Tricyrtis 'Mixed'

Tricyrtis formosana, Jewel Lily, Toad LIly

An unsung garden hero in our opinion. Tricyrtis thrives in damp shady corners where many other plants would struggle, rewarding you with laddering stems, bejewelled in speckled blooms in three different colours. Sometimes known as the Jewel Lily, or the less attractive Toad Lily, we're sure you'll fall in love with the beauty of this unusual hardy perennial. Height: 75cm (30"). Spread: 70cm (28"). More info
    • 3 bare root tricyrtis plants

    • Despatch: By end of May 2016
    •  
    • £9.99
    • 6 bare root tricyrtis plants

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

Delphinium 'New Millennium Dwarf Mixed'

We source our delphinium stocks from the best breeder in the world to guarantee top performance from our plants in your garden. The towering flower spires that make delphiniums a must-have garden perennial, can require sturdy staking to prevent them flopping under wind and rain. We're looking to change that with Delphinium 'New Millennium Juniors Mixed'. The sturdy upright stems don't need any staking or support, but give the same cottage garden feel as traditional varieties. From the world famous breeding of Terry Dowdeswell in New Zealand, these shorter, sturdier plants have been bred to perfection, with clear colours, evenly spaced florets, long flowering and high disease resistance. Height: 75cm (30"). Spread: 60cm (24").
More info
    • 5 delphinium postiplug plants

    • Despatch: By end of May 2016
    •  
    • £9.99
    • 10 delphinium postiplug plants

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

Penstemon 'Pensham Wedding Day' (Large Plant)

Ivory white bells crowd the upright stems of Penstemon 'Pensham Wedding Day’ above a neat clump of narrow semi-evergreen foliage. Brimming with understated elegance, this hardy perennial blends effortlessly into herbaceous borders. Like all of the Pensham Penstemons, this cultivar has been bred to withstand lower temperatures and inclement weather, making it perfect for UK summers. It has staying power too - flowering continuously from early summer through to October. Height: 75cm (30"). Spread: 60cm (24").

 

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

    • Despatch: By end of May 2016
    •  
    • £12.99
    • 2 x 1 litre potted penstemon plants

    • Despatch:
    •  
    • £14.99
    • Out of stock
    • 2 x 2 litre potted penstemon plants

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

Penstemon digitalis 'Husker Red' (Large Plant)

Beard Tongue

Sophisticated elegance, coupled with real staying power! These bushy, hardy perennials form neat semi evergreen clumps, with long summer displays of trumpet-like florets. Penstemon ‘Husker Red’ is distinctly different, with ruby-red foliage, and blush-white flowers.

Penstemon plants are known for being tough, reliable perennials, which will flower all summer long and into autumn. Penstemon ‘Husker Red’ also battles through rain and drought, and is remarkably slug resistant too. A classic cottage garden plant. Height and Spread: 50cm (20").

 

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

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

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

Sedum 'Matrona' (Large Plant)

Sedum telephium, Stonecrop

Sedum will attract butterflies to the garden in their droves. Sedum plants are long-lasting, hardy and drought tolerant. Sedum ‘Matrona’ forms a clump of foliage, with a unique bronze tinge, contrasting beautifully with its pink autumn blooms.

Sedum will thrive in hot, sunny borders, and are ideal for beginners. Their autumn flowering period is welcomed, bringing new colour to the garden as summer bedding dipslays fade away! Height: 75cm (30"). Spread: 30cm (12").

 

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

    • Despatch: By end of July 2016
    •  
    • £10.99
    • 2 x 3.5 litre potted sedum plants

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

Wallflower 'Bowles's Mauve' (Large Plant)

Erysimum, Cheiranthus

Flowering from February right through to midsummer, this hardy perennial well deserves its RHS AGM. Although relatively short lived, Wallflower 'Bowles Mauve' makes up for it in sheer flower power, producing masses of mauve flowers above clumps of grey-green, evergreen foliage. Versatile and undemanding, this tough little Eryisimum copes in even the poorest of soils. Perfect for filling beds and containers with long lasting colour. Height: 75cm (30"). Spread: 60cm (24").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 1.5 litre potted wallflower plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 1.5 litre potted wallflower plants

    • Despatch:
    •  
    • £16.99
    • Out of stock

Gaura lindheimeri 'Rosyjane' (Large Plant)

Gaura is a welcome addition to a mixed perennial border. The wiry, informal plants will fill gaps quickly and easily, with flowers from May to September, that’s 5 months of summer colour!

Gaura ‘Rosyjane’ is a breeding breakthrough, with large flowers, pure white and edged in candy pink. A star of the Chelsea Flower Show, and a real treat for your cottage garden border! Quick to establish and form clumps. Height and Spread: 60cm (24").

 

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

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

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