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 77 products.
 

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 3 days
    •  
    • £2.99

Geranium 'World's Top Six Mix'

Pelargonium, Zonal Geranium, Zonal Pelargonium

From the worlds's top geranium breeder 6 of their finest varieties. Each is an 'eyecatcher', exquisite in colour, ultra early, beautiful in form and size of bloom, and where possible has strikingly zoned foliage. They represent the very pinnacle of achievement in the breeders art. Suitable for bedding, border, pot plants, baskets and tubs. Contains 6 separately labelled inner packets each containing 5 seeds.
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 (30 seeds)

    • Despatch: Within 3 days
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    • £9.99

Tropaeolum speciosum

Flame Nasturtium, Flame Flower, Flame Creeper

Flame Flower. Gorgeous scarlet flowered climber. Climbs to 180-300cm (6-10ft).
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    • 1 packet (10 seeds)

    • Despatch: Within 3 days
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    • £4.69

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

More info
    • 1 packet (100 seeds)

    • Despatch: Within 3 days
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    • £2.69

Cyclamen 'All-the-year-round Flowering Mixed'

A balanced mixture of hardy garden varieties thriving in shade or woodland, chosen from species flowering at most periods of the year. Height: 8-15cm (3-6in). More info
    • 1 packet (16 seeds)

    • Despatch: Within 3 days
    •  
    • £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.
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    • 1 packet (170 seeds)

    • Despatch: Within 3 days
    •  
    • £2.99

Rudbeckia fulgida var. sullivantii 'Goldsturm'

Coneflower, Black-eyed Susan

A profusion of bright flowers up to 5in across on bushy plants.
More info
    • 1 packet (100 seeds)

    • Despatch: Within 3 days
    •  
    • £2.99

Salvia coccinea 'Summer Jewel Pink'

Scarlet Sage

Applauded by Fleuroselect judges, Salvia coccinea 'Summer Jewel Pink' is the latest addition to the ‘Summer Jewel’ series. Quicker to flower and more compact than other dwarf salvias, this free flowering variety bears its long lasting shell pink blooms above compact aromatic foliage. Scarlet Sage makes a stunning addition to borders and containers where it will attract pollinating insects to its delicate blooms. Although perennial, Salvia coccinea is half hardy and best treated as an annual in the UK. Height: 45cm (18"). Height: 45cm (18"). Spread: 30cm (12"). More info
    • 1 packet (30 seeds)

    • Despatch: Within 3 days
    •  
    • £2.79

Erigeron karvinskianus 'Profusion'

Erigeron karvinskianus, Fleabane, Mexican Fleabane

Lovely subject for hanging baskets, window boxes, patio tubs. Flowers within 3 months.
More info
    • 1 packet (200 seeds)

    • Despatch: Within 3 days
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    • £3.49

Gaura lindheimeri 'Sparkle White'

This stunning hardy perennial makes a fabulous border plant! Its graceful, slender stems are topped with a flurry of dazzling white, starry blooms that still look fresh and airy at the end of summer. This bushy, clump forming variety has a neat, compact habit that makes it perfect for the front of sunny borders or edging paths as a mini hedge. Once established, Gaura lindheimeri 'Sparkle White' even copes well during periods of drought. Height and spread: 45cm (18"). More info
    • 1 packet (15 seeds)

    • Despatch: Within 3 days
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    • £2.99

Geranium 'Moulin Rouge' F1 Hybrid

Pelargonium, Zonal Geranium, Zonal Pelargonium

Found to be the most outstanding bedding Geranium in T&M's trials. So vigorous, the plants are smothered in large scarlet blooms throughout the season. Sure to give a glorious display. Ideal for bedding or containers.
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 seeds)

    • Despatch: Within 3 days
    •  
    • £3.69

Geranium 'Border Supreme' F2 Hybrid

Pelargonium x hortorum, Zonal Geranium, Zonal Pelargonium

An exclusive blend of high quality bedding Geraniums at a very low price! Robust, free-flowering plants, with many large flower heads in shades of red, rose, pink, salmon and white. An inexpensive way of filling your borders and containers.
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 (18 seeds)

    • Despatch: Within 3 days
    •  
    • £2.69