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 167 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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    • £3.99

Begonia x tuberhybrida 'Scentsation Mixed' F1 Hybrid

The very first fragrant Begonia from seed! These vigorous plants produce wonderful, double to semi-double, pastel-coloured flowers and are stunning grown in individual pots or mixed containers. On damp mornings and sunny days, your garden will be filled with a delightful medley of fragrances from fresh lemon to a soft rose scent. This T&M New and Exclusive is sure to sell out, so place your order fast!

Culinary note: Add the bright coloured petals to sandwiches or salads for a light lemon taste and crisp texture. For more details about edible flowers click here.

More info
    • 1 packet (50 begonia seeds)

    • Despatch: Within 1 days
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    • £0.99

Osteospermum 'African Sun'

Dimorphotheca sinuata, African Daisy, Star of the Veldt, Dimorphotheca aurantiaca

Bushy, free-flowering plants, like a radiant sun with eye-catching golden yellow and vibrant orange bicoloured blooms. Stunning n containers as well as hot, dry borders, attracting bees and butterflies. Height: 30-45cm (12-18 inches).

More info
    • 1 packet (80 osteospermum seeds)

    • Despatch: Within 1 days
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    • £0.99

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).

More info
    • 1 packet (40 dahlia seeds)

    • Despatch: Within 1 days
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    • £2.99

Cosmos bipinnatus 'Pied Piper Red'

The only separate colour available in the Sea Shells type, with fluted, shell-like petals of velvet crimson-red. The ferny foliage helps to make this a wonderful cut flower as well as a good back of border plant.
More info
    • 1 packet (100 cosmos seeds)

    • Despatch: Within 1 days
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    • £0.99

Marigold 'Striped Marvel'

Tagetes patula, French Marigold

Raised by a Scottish T&M customer. We are delighted to introduce such a refreshing break in colour. Each petal is evenly divided by a red and yellow stripe and this produces a thoroughly eye-catching effect. The bushy, uniform plants produce masses of flowers, excellent for bedding and particularly good for cutting, lasting well in water. Occasional all yellow bloom produced through climate stress. Height: 60-75cm (24-30in).

Culinary note: The citrus tasting flowers have many uses, try them in salads, sandwiches or seafood dishes too. For more details about edible flowers click here.

More info
    • 1 packet (100 marigold seeds)

    • Despatch: Within 1 days
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    • £1.99 £0.99

Marigold 'Crackerjack Mixed'

Tagetes erecta, African Marigold

Big, bold double flowers in orange, gold and lemon borne well above the foliage. A very early and free flowering strain Flowers summer. Height 24in.

More info
    • 1 packet (250 marigold seeds)

    • Despatch: Within 1 days
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    • £1.99

Begonia x tuberhybrida 'Nonstop® Rose Petticoat' F1 Hybrid

Without doubt, a fantastic new colour to the 'Non-Stop®' series. Large,10cm (4in) eye-catching, deeply frilled, fully double blooms of white with a deep rose picotee. Height: 20-25cm (8-10in).

Culinary note: Add the bright coloured petals to sandwiches or salads for a light lemon taste and crisp texture. For more details about edible flowers click here.

More info
    • 1 packet (25 begonia seeds)

    • Despatch: Within 1 days
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    • £0.99

Cosmos bipinnatus 'Xanthos'

  • A totally new cosmos that's already causing a big stir!
  • Unique cosmos colour
  • Compact and early flowering
  • Garden performance guaranteed

Unique soft-yellow blooms are produced in profusion on compact dwarf plants, bringing real impact to patio containers, beds and borders. This early flowering cosmos will start to bloom in as little as 70 days from sowing, going on to offer to six months of colour from May to October - keep on top of the deadheading and new flowers will just keep coming!



Use the classy blooms en masse for an elegant feel to your displays, if not, set them in combination with other annuals to complement pastel shades or calm hot colours. The stand-out flowers also make a great underplanting to shrubs and hedging. These compact cosmos plants are the perfect option for exposed gardens where taller varieties would be blown about by the wind. Height: 60cm (24"). Spread: 40cm (16").
More info
    • 1 packet (30 cosmos seeds)

    • Despatch: Within 1 days
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    • £3.69
    • 2 packets (60 cosmos seeds)

    • Despatch: Within 1 days
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    • £4.49

Marigold 'Tomato Growing Secret'

Tagetes patula, French Marigold

Canny gardeners have been growing white fly repelling African and French marigolds alongside their tomatoes for decades. But we know that some marigolds make better white fly deterrents than others, and we've discovered the best there is! We're keeping the variety name under wraps, but we're happy to make it available to serious tomato growers. Try it this season alongside greenhouse and outdoor tomatoes - you'll even see your tomato plants grow better and bear more fruit with our marigolds around them.

 

Culinary note: French Marigold flowers are edible.

Culinary note: The citrus tasting flowers have many uses, try them in salads, sandwiches or seafood dishes too. For more details about edible flowers click here.

More info
    • 1 packet (50 marigold seeds)

    • Despatch: Within 1 days
    •  
    • £2.99

Cosmos sulphureus 'Ladybird Mixed'

Scarlet red together with tangerine and yellow, semi-double flowers.
More info
    • 1 packet (35 cosmos seeds)

    • Despatch: Within 1 days
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    • £3.39 £0.99

Cosmos sulphureus 'Brightness Mixed'

 Customer Rating

Possibly the most free-flowering cosmos of this type. Dwarf and bushy plants are covered with flowers in a delightful mixture of gold, lemon, orange and red from early summer through to the autumn frosts. Spectacular when planted towards the front of annual borders or in containers.

More info
    • 1 packet (100 cosmos seeds)

    • Despatch: Within 1 days
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    • £2.99