Thompson & Morgan

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Perennial & Biennial Seeds


Biennials live for 2 years, whereas perennials live for longer. As a general rule, biennial and perennial seeds should be sown in spring, but some can be sown in autumn as well. Many varieties will self-seed after flowering, giving you even more plants!

We have found 219 products.
 
Echinacea Purpurea Magnus

Echinacea purpurea 'Magnus'

Coneflower
An outstanding selection of the 'Cone Flower', distinguished by the warm bright colour of its exceptionally large flowers. The slender elegance and formality of its petals give it a style that will add class to larger flower arrangements. In the border it is no less valuable on account of its robust strong stems and general vigour which give 'Magnus' good wind and weather resistance. Flower in their first season from an early sowing. Flowers mid summer to winter. Height 1m (36 inches). More info
    • 1 packet (30 seeds)

    • Despatch: Within 2 Days
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    • £2.99
Poppy X Hybridus Summer Breeze Mixed

Poppy 'Summer Breeze Mixed'

Papaver nudicaule, Arctic Poppy, Icelandic Poppy

A first-year-flowering perennial with unbeatable flower power! Up to 100 delicate papery flowers per plant are produced throughout the summer in a mix of yellow, orange and white, creating a long-lasting, free-flowering and colourful border display.

 More info
    • 1 packet (40 seeds)

    • Despatch: Within 2 Days
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    • £2.99
Centranthus Ruber Snowcloud

Centranthus ruber 'Snowcloud'

Valerian, Red Valerian, Pretty Betsy
Attractive pure white selection. Ideal for attracting beneficial insects into the garden. Very long flowering and can be used as a cut flower. More info
    • 1 packet (70 seeds)

    • Despatch: Within 2 Days
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    • £1.49
Gerbera jamesonii 'T&M Mixed' F2 Hybrid

Gerbera jamesonii 'T&M Mixed' F2 Hybrid

Barberton Daisy, Transvaal Daisy
  • NEW in 2013
Fast growing and early to flower, this special T&M blend of large- bloomed gerbera make spectacular house plants. Perfect for the patio in summer and a sunny windowsill or glasshouse during the cooler months, they’ll provide months of vibrant colour. The flowers are of the very best quality and make excellent cut flowers. Height: 30-40cm (12-16"). More info
    • 1 packet (30 seeds)

    • Despatch: Within 2 Days
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    • £2.49
Knautia Macedonia

Knautia macedonica

Macedonian Scabious, Scabiosa rumelica
 Customer Rating
One of the finest perennials for the border we have seen. It has a very long season of flowering lasting well into the autumn and early winter. The dense, double, pin cushion scabious like flowers are a brilliantly strong cherry red, a rare colour in border flowers. Makes a large, neat, rounded bushy plant producing many flowers which are excellent for cutting. Easy to grow and undemanding. Flowers summer/autumn. Height 90-120cm (3-4ft). More info
    • 1 packet (50 seeds)

    • Despatch: Within 2 Days
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    • £3.79
Arum Lily

Arum Lily

Zantedeschia aethiopica, Calla Lily
A soothing sight by the waterside, in moist borders or large containers. These robust plants produce glossy foliage shooting like arrows from the base, then from late spring to mid-summer, the beautiful, pure white Arum Lily blooms become a sparkling attraction. Hardy with dry mulch winter protection. More info
    • 1 packet (20 seeds)

    • Despatch: Within 2 Days
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    • £1.99
Helenium Puberleum Autumn Lollipop

Helenium puberulum 'Autumn Lollipop'

Helen's Flower, Rosilla, Helenium puberleum

  Customer Rating

A curious plant for the front of the border. Autumn Lollipop boasts heads of rustic yellow and bronze with a small basal frill of ruffled petals. Highly ornate and also an extremely original cut flower. Height: 60-90cm (24-36in).

 More info
    • 1 packet (80 seeds)

    • Despatch: Within 2 Days
    •  
    • £0.69
Gaura Lindheimeri

Gaura lindheimeri

White Gaura, Lindhemier's Beeblossom
Spikes of ¾in white flowers, tinged in pink. Long flowering in the border and as cut flowers. Cannot be sent to Hawaii. More info
    • 1 packet (30 seeds)

    • Despatch: Within 2 Days
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    • £3.29
Centaurea Dealbata

Centaurea dealbata

Cornflower, Bachelor's Buttons
An attractive clump forming lavender pink cornflower, with the unusual characteristic of being perennial and flowering In the first year. Easy to grow. adding height and interest to borders, as well as making a superb border cut flower. Height: 80-90cm (32-36in). First Year Flowering Perennial, flowering in June/July. More info
    • 1 packet (80 seeds)

    • Despatch: Within 2 Days
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    • £1.99
Pyrethrum T&M Superb Mixture

Pyrethrum 'T&M Superb Mixture'

Tanacetum coccineum, Painted Daisy, Chrysanthemum coccineum
Easily grown and in full beauty when the last of the spring flowers have faded and before most of the summer kinds are in bloom. An excellent mixture of semi-double and single flowers in red, white, pink and rose. Height: 75-90cm (30-36in). More info
    • 1 packet (100 seeds)

    • Despatch: Within 2 Days
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    • £1.49
Penstemon X Hybrida Lilac Frost

Penstemon x hybrida 'Lilac Frost'

Beard Tongue
Probably the most winter-hardy, resilient Penstemon we have ever found! Bushy mounds of deep green foliage are enhanced by unusual frosty white, bicoloured blooms. Flowers throughout the summer in borders or large containers. More info
    • 1 packet (50 seeds)

    • Despatch: Within 2 Days
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    • £2.59
Aquilegia Caerulea

Aquilegia caerulea

Rocky Mountain Columbine, Colarado Blue Columbine, Granny's Bonnet
Possibly the most beautiful Aquilegia of all. With glorious light to deep blue flowers 2-3in across sometimes fetching bi-coloured with white. An excellent border perennial, grand for cutting, in bloom for several weeks and will grow in sun or light shade. Flowers late spring/early summer. Height: 30-35cm (12-14in) More info
    • 1 packet (100 seeds)

    • Despatch: Within 2 Days
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    • £2.99