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 47 products.
 

Zinnia marylandica 'Double Zahara Strawberry'

Boasting an exceptionally long flowering period, we believe Zinnia 'Double Zahara Strawberry' to be the best double, dwarf Zinnia on the market. Large, fully double blooms in a vivid strawberry colour are produced in abundance on compact, low-growing plants. With good heat and drought tolerance and excellent disease resistance, these exciting annuals need little maintenance to put on a fabulous display. Height and spread: 45cm (18"). More info
    • 1 packet (12 zinnia seeds)

    • Despatch: Within 1 days
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    • £3.79

Dahlia variabilis 'Showpiece Mixed Hybrids'

Several plants from this seed have won prizes on the show bench in USA, UK, Australia and New Zealand. This breeding produces sensational miniature decorative dahlias, very double and 3-4in across of a quality normally associated only with the most carefully selected of vegetatively propagated varieties. They have straight, strong stems and are remarkably floriferous in rich, bright colours including gold, crimson, purple, apricot and many shades of red and pink. More info
    • 1 packet (35 dahlia seeds)

    • Despatch: Within 1 days
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    • £0.99

Zinnia elegans 'Purple Prince'

 Customer Rating

Outstanding in Thompson & Morgan trials, these robust plants show excellent garden performance, flowering over a long period and producing an abundance of fully double, deep pink-purple, dahlia-like flowers. This is a taller-than-usual variety of zinnia which will add colour and height to border displays as well as to cut flower arrangements. Zinnia Purple Prince will flower all summer until the first frosts, attracting bees and butterflies as well as the admiration of your neighbours!

More info
    • 1 packet (100 zinnia seeds)

    • Despatch: Within 1 days
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    • £1.99

Dahlia variabilis 'Bishop's Children'

A fiery mix of such striking colour, yet with the innocent flower faces of Bishop's Children. Mid-height, and blends extremely well into borders. However, be warned that a colour eruption may occur! Spectacular in bedding and containers, and as a cut flower.Height: 60-75cm (24-30 inches). Planting distance 12-18 inches.
More info
    • 1 packet (50 dahlia seeds)

    • Despatch: Within 1 days
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    • £2.99

Rudbeckia hirta 'Green Eyes'

Coneflower, Rudbeckia 'Irish Eyes', Black-eyed Susan

Unique, with pointed yellow petals and olive green eye. Well branched, good for cutting.
More info
    • 1 packet (500 rudbeckia seeds)

    • Despatch: Within 1 days
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    • £0.99

Zinnia elegans 'Magellan Mixed' F1 Hybrid

Uniform, bushy, free-flowering plants produce large, fully double blooms of exceptional quality and weather resistance. Ideal planted in borders and containers for a knock-out display all summer. Height: 30-35cm (12-14in).
More info
    • 1 packet (10 zinnia seeds)

    • Despatch: Within 1 days
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    • £0.99

Zinnia elegans 'Whirlygig Mixed'

Fill your beds and borders with these distinctly marked, brightly coloured, semi cactus-like blooms, each with contrasting petal tips. Zinnia elegans 'Whirlygig Mixed' is an outstanding garden performer, freely flowering throughout the summer. These vibrant zinnia flowers are ideal for attracting bees and butterflies to your garden and also make an attractive cut flower for a vase indoors. Height: 60cm (24"). Spread: 30cm (12").
More info
    • 1 packet (100 zinnia seeds)

    • Despatch: Within 1 days
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    • £1.99

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

Aster 'Duchess Mixed'

Callistephus chinensis, China Aster

Wonderful flowers - like incurved chrysanthemums. More info
    • 1 packet (250 aster seeds)

    • Despatch: Within 1 days
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    • £2.99

Dahlia variabilis 'Redskin'

Very double, compact free-flowering with maroon to bronze-green foliage. A particularly good combination with marigolds. Height: 30-38cm (12-15in).
More info
    • 1 packet (30 dahlia seeds)

    • Despatch: Within 1 days
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    • £0.99

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 variabilis 'Collarette Dandy'

 Customer Rating
Dwarf bushy dahlias with delightful "collarette" form, in many shades of red, yellow, orange and white all with white matching or contrasting inner collar of quilled petals. Height: 50-60cm (20-24in).
More info
    • 1 packet (55 dahlia seeds)

    • Despatch: Within 1 days
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    • £2.99 £0.99