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 11 products.
 

Dahlia variabilis 'Giant Hybrids Mixed'

 Customer Rating

Huge flowered, double, semi-double and a few singles of the best cut flower varieties. Height: 90-150cm (3-5ft).

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    • 1 packet (40 dahlia seeds)

    • Despatch: by Monday
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    • £2.99

Dahlia variabilis 'Cactus Hybrids Mixed'

 Customer Rating

Curvaceous, spiky blooms, huge cut flower source, many fully double and mostly true to type. Superb too in the flower border for late summer/autumn blooms. Flowers late summer/autumn. Height 3-4ft. Planting distance 27 inches.

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    • 1 packet (56 dahlia seeds)

    • Despatch: by Monday
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    • £0.99

Dahlia variabilis 'Pompone Mixed'

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Almost 100% pompon. Height: 90-120cm (3-4ft).

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    • 1 packet (50 dahlia seeds)

    • Despatch: by Monday
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    • £2.99

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: by Monday
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    • £0.99

Cosmos bipinnatus 'Sensation Mixed'

 Customer Rating

A tall, upright variety for the back of sunny borders. Cosmos 'Sensation Mixed' produces masses of daisy-like flowers above delicate ferny foliage throughout summer and autumn. The strong stems and long lasting flowers of this easy to grow annual make it perfect for cutting. This fabulous mix contains a superb range of colours including white, pink and carmine. Height: 120cm (47"). Spread: 60cm (24").

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    • 1 packet (200 cosmos seeds)

    • Despatch: by Monday
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    • £2.69
    • 1 packet (80 cosmos seeds - seed tape)

    • Despatch: by Monday
    •  
    • £2.69

Cosmos bipinnatus 'Purity'

 Customer Rating
Ferny foliage and graceful pure white flowers up to 4in or more in diameter make this an effective and popular, easy annual. Flowers summer to autumn. Height 3 to 4 feet.
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    • 1 packet (100 cosmos seeds)

    • Despatch: by Monday
    •  
    • £2.99

Amaranthus caudatus 'Fat Spike'

Love-lies-bleeding, Tassel Flower

 Customer Rating
Highly attractive erect fat spikes in deep purplish red, from 3 inch thick tapering to 1 inch, as if standing guard. Ideal as a border filler, and for flower arranging. Height: 90-100cm (3-4ft)
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    • 1 packet (100 amaranthus seeds)

    • Despatch: by Monday
    •  
    • £2.99

Cosmos bipinnatus 'Psyche Mixed'

Semi-double and single, large, waved, upright blooms distinct and charming. 80% true from seed as they can make fine cut flowers and can also be used as summer flowering pot plants for the cold greenhouse. Flowers summer to autumn. Height 36in.

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    • 1 packet (100 seeds)

    • Despatch: by Monday
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    • £2.99

Amaranthus caudatus 'Pony Tails Mixed'

Love-lies-bleeding, Tassel Flower

Delightful long, decorative tassels in red and green shades, gently swish side to side in a summer breeze. Ideal for adding height and interest to summer bedding displays. Height: 90-120cm (36-48in) More info
    • 1 packet (1000 amaranthus seeds)

    • Despatch: by Monday
    •  
    • £2.99

Cosmos bipinnatus 'Sea Shells'

Fluted sea shells around a buttonlike centre. Finely cut, ferny foliage also useful for cutting.

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    • 1 packet (100 seeds)

    • Despatch: by Monday
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    • £2.99

Cosmos bipinnatus 'Cupcakes'

The latest creation to come from the World-renowned Thompson & Morgan plant breeding programme. Back in 2007, US customer Diane Engdahl of Santa Rosa, California, sent us seeds of an unusual cosmos growing in her back yard. Instead of having separate petals like most cosmos, all petals are fused into one single cup, completely changing the normally daisy-looking flower. Since then our breeders have been busy fixing the unusual trait across the colour mix, developing new shades and refining the habit of this uniquely shaped 'cupcake' cosmos. The result? An easy to grow, free-flowering three colour blend of single and semi-double blooms on tall bushy plants ideal for border designs and container growing. Cosmos 'Cupcakes' was the stand out performer in our 2014 flower trials, coping well and looking great come rain, shine or drought. This is our must-have flower for 2015, we just know you'll want to show it off to everyone. Height: 120cm (48"). Spread: 60cm (24").

More info
    • 1 packet (100 cosmos seeds)

    • Despatch: by Monday
    •  
    • £1.99