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 311 products.
 

Cucamelon 'Melothria'

Melothria scabra, Mexican gherkhin, Mouse Melon

  • This year's must-have, decorative, fruiting climber, ideal for planters

If you want to be on trend in the kitchen and in the garden, join top chefs and celeb gardeners by putting the unusual fruits of cucamelon on your menu this season. This easy to grow fruiting climber performs strongly on a sunny patio or border and even better in the greenhouse, producing heavy crops of mini melon fruits tasting of cucumber with a twist of lime! Eat the grape-sized fruits fresh from the vine all through summer, but do try to save some for salads, salsas and pickles!


The vigorous decorative foliage makes this lush climber truly dual purpose - grow this trendy patio fruit on an ornate obelisk and make it a talking point feature of your summer garden. For maximum fruit production, stop main stems at 2.4m (8ft) and trim back all side shoots to 45cm (18"). Height: 2.4m (8ft). Spread: 50cm (20").
More info
    • 1 packet (20 cucamelon seeds)

    • Despatch: by Monday
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    • £2.49

Heliotrope 'Marine'

Heliotropium arborescens, Cherry Pie, Heliotropium peruvianum

Fragrant, royal purple, large flowered compact form with smart, deep green foliage.
More info
    • 1 packet (100 heliotrope seeds)

    • Despatch: by Monday
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    • £2.79 £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").

More info
    • 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

Petunia x hybrida 'Super Cascade Improved' F1 Hybrid

 Customer Rating
The first fully integrated petunia mixture. For hanging baskets, containers and walls. The Super Cascades are much freer flowering and will cascade in 8 different colours - blue, white, pink, blush, cerise, salmon, scarlet and violet from a formula blending of seed. Weather tolerance, heat and wet, is excellent, they bloom from planting out to frost and have good drought tolerance. Growing tip: Get the best out of your petunias with our specially formulated Petunia Fertiliser - the perfect balance of nutrients to get them off to a flying start and nourish them through the summer.
More info
    • 1 packet (50 petunia seeds)

    • Despatch: by Monday
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    • £3.99

Nasturtium 'Whirlybird Cherry'

Tropaeolum majus, Indian Cress

Low mounds covered with a mass of bloom. The semidouble cherry rose flowers are carried well above the foliage and face upwards so all are visible. Ideal for bedding, borders, tubs, containers etc. Flowers can be cut for unusual floral decorations. Flowers summer/autumn. Height 30cm (12in).


Culinary note: The peppery flavour of the leaves and colourful flowers will enrich salads and the unripened seeds can used like capers – delicious combined with cream cheese or butter in canapés. For more details about edible flowers click here.

More info
    • 1 packet (25 seeds)

    • Despatch: by Monday
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    • £2.29

Nicotiana mutabilis 'Marshmallow'

Tobacco Plant

 Customer Rating

Reintroduced following increasing interest by garden designers and visitors to our Open Days. Nicotiana Marshmallow is a very unusual and visually stunning variety which will add stature and fragrance to your summer borders. Above basal rossettes of large leaves, are formed masses of wiry stems are covered with a 'haze' of small blooms, each one fading through red, pink and white to give the effect of three flower colours on each plant.

More info
    • 1 packet (100 nicotiana seeds)

    • Despatch: by Monday
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    • £2.29

Nicotiana x hybrida 'Whisper Mixed' F1 Hybrid

Tobacco Plant

A 'must-have' border plant, especially when you want to fill a space quickly. Elegant upright flower stems tower above large basal rosettes of leaves, bearing petite flowers that fade from red to pink to white, giving the effect of three colours on each plant. The evening fragrance of British bred Nicotiana 'Whisper Mixed' only adds to its irresistible charm. An elegant annual that is most effective when planted in large drifts throughout beds and borders. Height: 100cm (39"). Spread: 45cm (18"). More info
    • 1 packet (70 nicotiana seeds)

    • Despatch: by Monday
    •  
    • £2.69

Mimosa pudica

Sensitive Plant

"Sensitive Plant", so called because the leaflets fold up in a most spectacular manner when touched or blown by the wind. Run your hand over the plant and the leaves will fold up and the leaf stalk will drop as if on a hinge. The movements are quickest with young plants in bright sunshine. They return to their normal condition in a few minutes. More info
    • 1 packet (100 mimosa seeds)

    • Despatch: by Monday
    •  
    • £0.99

Morning Glory 'Carnevale di Venezia'

Ipomoea purpurea, Convolvulus purpureus, Pharbitis purpurea

A vigorous climber producing masses of spectacular, striped blue and pink blooms with intricate markings, as if painted individually. Flowers all summer, transforming your garden with all the dazzling colours of the Venice Carnival. Twining climber to 2m (6ft). More info
    • 1 packet (35 morning glory seeds)

    • Despatch: by Monday
    •  
    • £0.99

Zinnia elegans 'Lilliput Mix'

A superb blend of this most unusual flower type, specially selected for its wide range of bright colours. Attractive fully double 2.5-3cm (1-1½in) pom-pom like flowers are stunning in borders or as a cut flower. Height: 45-50cm (18-20in). More info
    • 1 packet (200 zinnia seeds)

    • Despatch: by Monday
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    • £0.99

Gazania 'Kiss Rose' F1 Hybrid

Treasure Flower

Very early and free flowering even in dull, cool weather. Naturally compact, strong basal branches, ensuring multiflowering plants. Ideal for borders, and containers. More info
    • 1 packet (20 gazania seeds)

    • Despatch: by Monday
    •  
    • £3.69 £0.99

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: by Monday
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    • £2.99 £0.99