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 25 products.
 

Heteropappus meyendorfii 'Blue Knoll'

Seed of this amazing new garden plant can be sown early in the year* and by the same autumn will be completely smothered in hundreds and thousands of shiny, light reflecting flowers, forming perfect mounds (or knolls) 30cm (12in) high and 45cm (18in) across. During a season when little else is in flower, they are a perfect fit for a change in containers or will brighten up the border, looking like blue charm chrysanthemums. No matter what the weather conditions - torrential rain, snow or frost they continue to look far and away the best, brightest plant in the garden, even right through November. *Sow during January/February to flower in October/November. Sow September/October to flower following September/October. More info
    • 1 packet (50 heteropappus seeds)

    • Despatch: Within 1 days
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    • £0.99

Salvia patens

Gentian Sage

A classic border plant, ideal for adding a cool blue drift to your planting schemes. The attractive, large blue hooded florets are borne on erect stems above toothed foliage. First year flowering, blooms throughout the summer into autumn. Height: 45-60cm (18-24in).
More info
    • 1 packet (15 salvia seeds)

    • Despatch: Within 1 days
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    • £0.99

Calceolaria 'Sunset Mixed'

Slipper Flower, Pocketbook Plant, Pouch Flower, Slipperwort

Three stunning colours for summer bedding and containers, including copper-orange and red, rich-red, yellow and scarlet. Bushy habit with lots of short stemmed flowers over a long period. Frost hardy. Early sowing recommended.

Height: 15-20cm (6-8in)

More info
    • 1 packet (35 calceolaria seeds)

    • Despatch: Within 1 days
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    • £0.99

Canna indica 'T&M Hybrids'

Indian Shot Plant

 Customer Rating
Shades of yellow, red and cream with pretty bronze or green foliage. Sow early.
More info
    • 1 packet (15 canna indica seeds)

    • Despatch: Within 1 days
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    • £0.99

Rudbeckia 'All Sorts Mixed'

Coneflower, Black-eyed Susan

Made up from the full range of varieties we offer. Excellent for cutting and border. Most in fact are hardy perennials in temperate climates in all but the severest winter.
More info
    • 1 packet (170 rudbeckia seeds)

    • Despatch: Within 1 days
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    • £2.99

Delosperma floribunda 'Stardust'

Ice Plant

 Customer Rating
The perfect plant for that hot, dry spot in your borders or rockeries. Dwarf, shiny, deep green, almost metallic-looking succulent foliage bursts into bloom from mid May. Plants are covered with spectacular lilac-purple flowers flowers with large white centres, flowering until the first frost. Loved by butterflies. Height: 10-15cm (4-6in)
More info
    • 1 packet (200 delosperma seeds)

    • Despatch: Within 1 days
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    • £2.69

Geranium 'Summer Showers Burgundy'

Pelargonium peltatum, Ivy-leaved Geranium, Ivy-leaved Pelargonium

Presenting the first burgundy flowered ivy geranium, true from seed! Grown in containers, baskets or bedding even in hot weather - the strong, well branched, non interlocking plants hold six to eight large florets.
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.
More info
    • 1 packet (6 geranium seeds)

    • Despatch: Within 1 days
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    • £0.99

Agastache aurantiaca 'Apricot Sprite'

Hummingbird Mint

Tubular blooms of apricot orange form dense flower spikes above clumps of silvery green, richly aromatic foliage. Agastache aurantiaca 'Apricot Sprite' is compact and quick growing - the perfect choice for beds and containers or filling gaps in borders. Bred and selected by T&M, this free flowering, half hardy perennial has been awarded a Fleuroselect Quality Mark. All this, and it also flowers in its first year from seed! Height: 45cm (18"). Spread: 30cm (12").
More info
    • 1 packet (30 agastache seeds)

    • Despatch: Within 1 days
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    • £0.99

Geranium 'Horizon Pink Ice' F1 Hybrid

Pelargonium x hybrida, Zonal Geranium, Zonal Pelargonium

Striking pink geranium. These robust plants are very bushy and free-flowering, creating an eye-catching display in borders or containers. Sow from January to mid-March to produce flowering plants by early summer. 30-35cm (12-14in)
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.
More info
    • 1 packet (6 geranium seeds)

    • Despatch: Within 1 days
    •  
    • £0.99

Lisianthius nigrescens

Flower of Death

This rare exotic plant is little known outside its native homeland of Mexico. A choice species, and seldom offered, Lisianthius nigrescens bears long, tubular flowers of the darkest black, on slender, towering stems. This extraordinary perennial makes a dramatic specimen plant and a fascinating talking point that will create interest and wonder at the back of borders. Lisianthius nigrescens is half-hardy but will require winter protection in a frost free environment during the winter months. Height: 180cm (71"). Spread: 50cm (20"). More info
    • 1 packet (20 lisianthius seeds)

    • Despatch: Within 1 days
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    • £3.29