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 204 products.
 
Centranthus Star Ruber Mixed

Centranthus 'Star Ruber Mixed'

Valerian, Red Valerian, Pretty Betsy
A beautiful border plant beloved by bees and butterflies. Mixture contains three colours: rose, white and maroon. Plants are lightly fragrant, long flowering and may also be used as a cut flower. More info
    • 1 packet (100 seeds)

    • Despatch: Within 2 Days
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    • £2.69
Verbena Bonariensis

Verbena bonariensis

Glandularia, Verbena patagonica
Tall heads of bright, eye-catching rosy lavender, adding a tranquil tropical feel to borders. Height: 120-150cm (4-5ft). More info
    • 1 packet (200 seeds)

    • Despatch: Within 2 Days
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    • £2.99
Coreopsis Grandiflora Presto

Coreopsis grandiflora 'Presto'

Tickseed
A breeding breakthrough, a true first year flowering perennial Coreopsis, ideal for planting in containers, window boxes or towards the front of borders. Naturally dwarf and compact ball-shaped plants are smothered in double golden yellow blooms all summer. More info
    • 1 packet (40 seeds)

    • Despatch: Within 2 Days
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    • £2.19
Geranium Pratense Purple Haze

Geranium pratense 'Purple Haze'

Hardy Geranium, Meadow Cranesbill

One of the hardy Geranium discoveries of the century! 'Purple Haze' is a stunning plant, producing amazing foliage with a unique bronze-purple hue, a shade rarely seen in hardy Geranium foliage. The leaves are deepest in shade during spring, gradually changing to an attractive deep green with strong purple edging. Even more exciting is the striking contrast of the blooms, perfectly themed in shades of gorgeous violet-mauve. Height: 60-75cm (24-30in).

 More info
    • 1 packet (5 seeds)

    • Despatch: Within 2 Days
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    • £0.99
Viola X Williamsiana Singing The Blues

Pansy 'Singing the Blues'

Viola x wittrockiana

This mixture of four enchanting colours, in shades and contrasts of blue, are not just pretty but the most sensational breakthrough in Violas for a decade. They were specifically bred for containers, baskets and ground cover, possessing a unique trailing habit. Above all they are wonderfully fragrant with a gorgeous, pervading sweet scent. Flowers appear in abundance and because they are tolerant to cold and heat, they can be grown all year round. Height: 2-3in Flowers spring/summer.


Culinary note: Some parts of these flowers are edible. For more details about edible flowers click here.

 More info
    • 1 packet (25 seeds)

    • Despatch: Within 2 Days
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    • £0.69
Oenothera Lemon Sunset

Oenothera 'Lemon Sunset'

Evening Primrose, Sundrops

An exquisite Evening Primrose with beautiful 10cm (4in) soft-yellow flowers that mature by changing to an attractive sunset-red. Ideal for adding height to borders, as well as a delicate evening fragrance to your garden.

Height 90-100cm (36-40in).


Culinary note: Some parts of these flowers are edible. For more details about edible flowers click here.

 More info
    • 1 packet (30 seeds)

    • Despatch: Within 2 Days
    • SAVE £2.20  
    • £2.89 £0.69
Commelina Dianthifolia

Commelina dianthifolia

Bird-bill Day Flower, Widow's Tears

  Customer Rating

A very rare plant indeed. This is one of the few plants with such intense blue flowers and that will also perform well in the garden. Flowering in its first year with 2.5cm (1in) gentian blue flowers, it then produces tubers and springs back to life the following year with an unceasing display of blooms. Wonderful in containers, rock gardens and the border (regardless of soil conditions). Hardy down to -8/-10C. Flowers summer. Height 15-30cm (6-12in.)

 More info
    • 1 packet (25 seeds)

    • Despatch: Within 2 Days
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    • £1.49
Geranium Wallichianum Buxtons Blue

Geranium wallichianum 'Buxton's Blue'

Geranium wallichianum 'Buxton's Variety', Hardy Geranium, Cranesbill
This is definitely the star of the perennial geranium family producing flowers virtually non-stop from mid summer to early autumn. The flowers themselves are a delight, a gorgeous clear opal, or Nemophila blue with large white centres, against which the dark stamens and dark veining of the petals contrast beautifully. The plant forms an attractive clump with attractive wedge shaped, silky, deeply toothed leaves, making this a very garden worthy plant even when not in flower. It comes quite true from seed and has been given an Award of Garden Merit by the Royal Horticultural Society. Requirements: One of the easiest perennials to cultivate, happy in sun or light shade and any free draining garden soil. More info
    • 1 packet (8 seeds)

    • Despatch:
    •  
    • £1.49
    • Out of stock
Gaillardia x grandiflora 'Arizona Red Shades'

Gaillardia x grandiflora 'Arizona Red Shades'

Blanket Flower
  • First red gaillardia from seed
A spectacular new dwarf Blanket Flower with a long-flowering period and superb garden performance. Flowering in their first year, the fiery red blooms sit neatly above uniform, well-branched plants throughout summer and well into autumn. Gaillardia x grandiflora 'Arizona Red Shades' is undemanding, providing fabulous colour whatever the weather. Perfect for containers or filling gaps in the front of borders. Height: 30cm (12”). Spread: 45cm (18”). More info
    • 1 packet (20 seeds)

    • Despatch: Within 2 Days
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    • £2.99
Dianthus barbatus 'Kaleidoscope Mixed'

Dianthus barbatus 'Kaleidoscope Mixed'

Sweet William
  • NEW in 2013
  • RHS Perfect for Pollinators
A cottage garden favourite with an unusual colour twist! This beautiful Sweet William produces large heads of pretty pink flowers that gradually mature to white, creating a delightful bicolour effect. Sweet William ‘Kaleidoscope’ is highly scented with multi branching stems that make it superb for cutting. Often grown as a biennial, this short lived perennial is ideal for borders, beds and containers, and will even flower in the same year if sown early. Height: 60cm (24”). Spread: 30cm (12”).

Culinary note: Some parts of these flowers are edible. For more details about edible flowers click here.

 More info
    • 1 packet (40 seeds)

    • Despatch: Within 2 Days
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    • £0.99
Nepeta Transcaucasica* Blue Infinity

Nepeta transcaucasica 'Blue Infinity'

Catmint

Tall wands of violet-blue flowers in seemingly infinate quantity over a long period. With its characteristic aromatic fragrance it is extremely effective in the border, long-lived, easily grown and very reliable.

* Seed came to T&M under this name which is yet to be verified.

 More info
    • 1 packet (45 seeds)

    • Despatch: Within 2 Days
    • SAVE £3.30  
    • £3.99 £0.69
Meconopsis Grandis

Meconopsis grandis

Himalayan Blue Poppy
 Customer Rating

Sturdy and long-lived with huge flowers 10-12cm (4-5in) across in a wonderful blue, shot with violet on erect stems.

 More info
    • 1 packet (30 seeds)

    • Despatch: Within 2 Days
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    • £2.99