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 55 products.
 

Verbascum x hybrida 'Snow Maiden'

Mullein, Celsia

 Customer Rating

A first class garden plant! Well branched, erect spikes covered in large 4cm (1½in) pure white flowers, over a long period. An incredibly beautiful plant for the back of borders, seldom requiring support.

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    • 1 packet (100 verbascum seeds)

    • Despatch: Within 1 days
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    • £0.99

Red Hot Poker 'Traffic Lights'

Kniphofia hirsuta, Torch Lily

 Customer Rating
An intriguing dwarf red hot poker with unusual red, amber and green flower spikes. First year flowering, adding interest to borders and containers. Height: 30-40cm (12-16in). *Sow Sept/Oct to flower the following season.
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    • 1 packet (20 red hot poker seeds)

    • Despatch: Within 1 days
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    • £0.99

Hellebore (Christmas Rose)

Helleborus niger

Surprise your friends and neighbours with an arrangement of Christmas roses for the festive season! Beautiful blooms at a time when little else is available. From seed you can have a group quite close together in a way which would cost you a great deal if you bought the plants. They flower in about three years from seed and invariably produce stronger, healthier plants.

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    • 1 packet (40 hellebore seeds)

    • Despatch: Within 1 days
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    • £0.99

Silene laciniata 'Jack Flash'

Catchfly, Campion

Wow! What a stunning perennial! Easy to grow and sure to catch some admiring glances. Attractive bright red, starburst blooms borne on slender stems. Goes on flowering over a very long period.
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    • 1 packet (15 silene seeds)

    • Despatch: Within 1 days
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    • £2.99

Aconitum carmichaelii

Monkshood, Wolf's Bane, Aconitum fischeri

An imposing long flowering, long lived perennial with pyramids of beautiful 2 inch flowers. Aconitum is an excellent border plant easily grown from seed. Rich blue flower spikes add a unique colour to the garden, held aloft delphinium-like foliage. Aconitum spikes also last as a cut flower.
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    • 1 packet (50 aconitum seeds)

    • Despatch: Within 1 days
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    • £0.99

Geranium 'Horizon Coral Spice' F1 Hybrid

Pelargonium x hortorum, Zonal Geranium, Zonal Pelargonium

A gorgeous new warm colour in geraniums. Large, well rounded, bright coral flower heads above lightly zoned foliage. With vigorous performance, it will flower nonstop until first frosts.
Although technically perennial, Pelargoniums are only half hardy and therefore normally treated as annuals in the UK. However, with care, they may be overwintered in a frost free greenhouse.
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    • 1 packet (6 geranium seeds)

    • Despatch: Within 1 days
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    • £0.99

Sedum 'Rock Garden Mixed'

Sedum rupestre, Sedum spathulifolium, Sedum album, Sedum aizoon, Sedum reflexum, Stone Orpine, Reflexed Stonecrop, Spoon-leaved Stonecrop, White Stonecrop

Harvest permitting includes: S. reflexion, S. spathulifolium, S. album hybrids, S. aizoon and many others in full foliage and flowering colour range.

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    • 1 packet (300 sedum seeds)

    • Despatch: Within 1 days
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    • £0.99

Sunflower maximiliani

Helianthus maximiliani, Maximilian Sunflower

Often known as the Maximilian Sunflower, this attractive species produces masses of golden yellow, 7cm (3") wide blooms all the way up the tall stems, which have a sweet chocolate fragrance. Perennial sunflower Helianthus maximiliani makes a stunning addition to the back of borders and a good late summer food source for both birds and butterflies. Height: 250cm (98"). Spread: 100cm (39").


Companion planting: Try growing sunflowers with chives to deter aphids.


Useful links:

Companion Planting

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    • 1 packet (100 sunflower seeds)

    • Despatch: Within 1 days
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    • £2.99

Dianthus caryophyllus 'Trailing Carnations Mixed'

Wild Carnation

Travelling in the Alpine regions of Europe one is struck by the magnificent and visual impact of their window boxes, hanging baskets, pots, tubs etc. And then we realised that they make liberal use of pendulous carnations adding an extra slant in perspective and design. The colour range is mainly pink and red shades.

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

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    • 1 packet (100 dianthus seeds)

    • Despatch: Within 1 days
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    • £0.99

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.
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    • 1 packet (100 centrantus seeds)

    • Despatch: Within 1 days
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    • £0.99

Scabiosa drakensbergensis

Scabious, Pincushion Flower

A rare giant from the Drakensberg Mountains of South Africa. The stout broomstick-like stems have attractive wrinkled leaves and ivory white 'cushion' flowers which bloom on tall stems from July to October. A rare and spectacular addition to any garden.

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    • 1 packet (20 scabiosa seeds)

    • Despatch: Within 1 days
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    • £0.99

Saponaria ocymoides

Tumbling Ted, Rock Soapwort

Spreading rockery, or paving plant, myriads of ½in pink flowers.

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    • 1 packet (25 saponaria seeds)

    • Despatch: Within 1 days
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    • £0.99