Thompson & Morgan

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Half-hardy Annual Seeds


Sow half-hardy annuals in early spring, making sure that you protect them from frost. Plant them out after all risk of frost has passed and you'll be rewarded with delightful flowers all throughout the summer. Hint: use the selections in the left menu to narrow down your search for the perfect half-hardy annual seeds for your garden. For direct sowing take a look at our stunning range of hardy annual seeds.



We have found 116 products.
 

Rudbeckia hirta 'Becky Mixed'

Coneflower, Black-eyed Susan

For the first time you can grow this cheerful, free flowering annual in containers and hanging baskets! Becky produces extra dwarf plants, neat and compact in a well balanced mixture of lemon to bright orange flowers, each with a slightly darker contrasting centre disc. They now make ideal basket and container plants flowering right up to first frost, producing large flowers measuring up to 15cm (6in) across! Flowers mid summer to frost. Height 20-25cm (8-10in).
More info
    • 1 packet (50 rudbeckia seeds)

    • Despatch: Within 1 days
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    • £2.19

Zinnia elegans 'Candy Cane Mixed'

Excellent quality, scabious-flowered zinnia in a wide range of vivid colours including reds, pinks and oranges. Zinnia elegans Candy Cane Mixed will flower freely all summer. Ideal for cutting and will attract beneficial insects and butterflies to the garden. More info
    • 1 packet (100 zinnia seeds)

    • Despatch: Within 1 days
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    • £2.39

Heliotrope 'Dwarf Marine'

Heliotropium, Cherry Pie, Heliotropium peruvianum

Once you've experienced the sweet, pungent scent, coming from Heliotrope, or 'cherry pie' as it is commonly called, on a still summer evening you won't want to be without it. Few plants can fill the air with such a heady fragrance as this. Marine is a royal purple, large flowered yet compact form with attractive, dark green foliage and bushy habit. Excellent for beds, borders and as a summer flowering pot plant. Flowers summer. Height 45cm (18in). More info
    • 1 packet (150 heliotrope seeds)

    • Despatch: Within 1 days
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    • £2.99

Rudbeckia hirta 'Prairie Sun'

Coneflower, Black-eyed Susan

 Customer Rating

An impressive debut for beds and borders, this unique new plant was awarded a Fleuroselect Gold Medal. The unusual blooms with central green cones and bright orange petals radiating back to lemon yellow, make dazzling cut flowers.

More info
    • 1 packet (25 rudbeckia seeds)

    • Despatch: Within 1 days
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    • £3.49

Dahlia coccinea 'Species Mixed'

A vibrant mixture of delicate single flowers in several colours with many bicolour shades, Tall and free flowering, makes it ideal for adding height to bedding displays or filling gaps in perennial borders. Height 5 feet. Planting distance 27 inches.

More info
    • 1 packet (25 dahlia seeds)

    • Despatch: Within 1 days
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    • £0.69

Snake Gourd - RHS Garden Explorers Children's Seeds

Trichosanthes cucumerina

I'm a strange 'gourd' that makes an exciting plant to grow as I have fruits that look like slippery snakes! When my fruits are dried you can paint me with spots, stars, stripes or whatever you like! Height: 2m. Why Not invite your friends round and see who can paint the brightest or craziest snake? More info
    • 1 packet (5 snake gourd seeds)

    • Despatch: Within 1 days
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    • £1.49

Begonia semperflorens 'Fairyland Mixed'

Begonia 'Fairyland Mixed' is a striking semi double, rose-bud flowered bedding begonia. This British-bred variety has outstanding vigour and excellent garden performance that is not usually seen in seed-raised, double-flowered begonias. Offering premium quality at a less than premium price, these versatile plants will create a riot of colour in borders and containers, thriving equally well in sun or shade. Height: 25cm (10"). Spread: 30cm (12"). More info
    • 1 packet (100 begonia seeds)

    • Despatch: Within 1 days
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    • £3.19

Lobelia pendula 'Monsoon'

  • Attractive late summer bronze foliage
If you liked Lobelia 'Crystal Palace' then this trailing version is sure to appeal. With a vigorous cascading habit and masses of deep blue flowers, Lobelia 'Monsoon' is ideal for filling baskets and containers or spilling over low walls and rockeries. The bright green summer foliage matures to a rich shade of bronze as the autumn approaches for a spectacular late summer display. Height: 15cm (6"). Spread: 30cm (12").
More info
    • 1 packet (650 lobelia seeds)

    • Despatch: Within 1 days
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    • £2.19

Phlox drummondii 'Dwarf Beauty Mixed'

Annual Phlox

A beautiful annual which blooms throughout a long summer season. It produces large solid heads of bright rich colours on dwarf bushy plants. Admirable for filling out summer beds sowing in drifts etc, and the flowers are splendid for cutting. Autumn sown plants make fine spring flowering pot plants for the cool greenhouse. Flowers early summer to autumn. More info
    • 1 packet (200 phlox seeds)

    • Despatch: Within 1 days
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    • £2.49

Lobelia erinus 'Crystal Palace'

Dainty, deep blue lobelia flowers smother neat globes of foliage that form very dwarf, compact plants. Lobelia 'Crystal Palace' makes a sparkling addition to beds, containers, flower Pouches® and window-boxes, and even looks well placed in the rockery. An easy to grow annual that is deservedly popular for its versatility and long flowering period. Height: 10cm (4"). Spread: 15cm (6"). More info
    • 1 packet (2500 lobelia seeds)

    • Despatch: Within 1 days
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    • £2.29

Zinnia elegans 'Giant Double Mixed'

Large double flowers and long rigid stems which make them ideal for cutting. The symmetrical form of each flower makes it a thing of beauty in itself. A good blend of the best colours with giant 11cm (4½in) blooms . More info
    • 1 packet (60 zinnia seeds)

    • Despatch: Within 1 days
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    • £2.59

Dahlia variabilis 'Fireworks Mixed'

After over 10 years T&M's flower breeders have successfully bred the first ever striped mixture of Dahlias from seed! Spectacular dwarf free-flowering bushy plants with uniquely striped blooms which erupt into a wide range of bright and vibrant colours. Sure to create a dazzling display in borders or containers. Occasionally a solid coloured bloom may also appear. Height: 40cm (16in).
More info
    • 1 packet (75 dahlia seeds)

    • Despatch: Within 1 days
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    • £2.89