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 24 products.
 

Petunia grandiflora 'Double Cascade Burgundy Plum Vein' F1 Hybrid

Giant, fully double flowers of burgundy or plum veined, often more than 10cm (4in) across! Add to this its cascading habit and you have one of the very best basket and container plants creating a waterfall of pleated powderpuffs all summer long. Height: 23-30cm (9-12in). 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.Click here to buy now. More info
    • 1 packet (25 petunia seeds)

    • Despatch: Within 1 days
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    • £3.69 £0.99

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.
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    • 1 packet (100 cosmos 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").
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    • 1 packet (30 cosmos seeds)

    • Despatch: Within 1 days
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    • £2.49
    • 2 packets (60 cosmos seeds)

    • Despatch: Within 1 days
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    • £4.49

Nasturtium 'Firebird'

Tropaeolum majus, Indian Cress

  • Stunning in baskets or containers
This eye-catching trailing Nasturtium is superb for hanging baskets where it will create neat cascades of fiery blooms, above unusual variegated foliage. Try growing Nasturtium 'Firebird' in baskets, window boxes and containers and watch it ignite your patio all summer long! The edible flowers are also great added to salads for a peppery kick. Trails to: 40cm (16").

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.

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    • 1 packet (30 nasturtium seeds)

    • Despatch: Within 1 days
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    • £2.99

Salvia farinacea 'Fairy Queen'

Mealy Sage, Mealycup Sage

Unique breeding has brought us this very visually appealing Salvia. Bushy, compact plants bear multiple spikes of attractive blue and white bicoloured flowers on distinctive dark stems. Flowers all summer and continues through to October in borders or containers. Height: 35-45cm (14-18in).
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    • 1 packet (40 salvia seeds)

    • Despatch: Within 1 days
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    • £0.99

Rudbeckia hirta 'Cappuccino'

Coneflower, Black-eyed Susan

 Customer Rating

For a fabulous focal point in borders, plant this dazzling rudbeckia! Large 15cm (6in) diameter blooms in bright shades of rusty gold with contrasting darker centres will bloom all summer long. Vigorous, well-branched and heat tolerant plants will produce stunning semi-tall flowers which are perfect for cutting.

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    • 1 packet (50 rudbeckia seeds)

    • Despatch: Within 1 days
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    • £2.39

Thunbergia alata 'Superstar Orange'

Black-eyed Susan

 Customer Rating
A stunning bright orange Black-Eyed Susan with the largest flowers we have ever seen on a seed raised Thunbergia. Vigorous plants quickly cover a trellis against a sunny fence, or look spectacular growing up an obelisk in a container.
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    • 1 packet (12 thunbergia seeds)

    • Despatch: Within 1 days
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    • £3.99

Nicotiana langsdorffii

Tobacco Plant, Langsdorff's Tobacco

A delightful annual from Chile and Brazil with tall branching stems and drooping sprays of apple green bells. Very exotic, yet easy to grow. Ideal for the back of the border or as a 'dot' plant among smaller bedding plants. Try growing it next to our Salvia pratensis, it looks superb. An absolute must for the flower arranger too! Height: 90-150cm (3-5ft)
More info
    • 1 packet (500 nicotiana seeds)

    • Despatch: Within 1 days
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    • £2.69

Dahlia variabilis 'Sunny Reggae'

  • Colour combo like no other!
From reds through apricots and oranges, Dahlia 'Sunny Reggae' boasts a colour combination like no other! Exquisite semi-double flowers each have their own unique character, some with collars of small cream petals at their centre, others with blushed petals in contrasting colours. Free-flowering from July to October, these warm Dahlia flowers are highly attractive to bees and other pollinating insects. Bushy and compact, grow dwarf Dahlias in beds, borders or containers for a long and colourful summer display. Height: 50cm (20"). Spread: 40cm (16").
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    • 1 packet (40 dahlia seeds)

    • Despatch: Within 1 days
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    • £2.79

Cosmos bipinnatus 'Gazebo Mixed'

 Customer Rating
A mid-height, easy to grow annual with well branched plants which come into flower earlier than most varieties. The attractive fern-like foliage is crowned with many large blooms of velvet red, rose-pink and pure white. An ideal border filler, or simply use in a large container or as a bedding plant. Flowers summer. Height: 60cm (24in).
More info
    • 1 packet (100 cosmos seeds)

    • Despatch: Within 1 days
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    • £2.99

Cosmos bipinnatus 'Antiquity'

A completely unique colour in Cosmos. Flowers are rich burgundy on opening and change to an antique bronze-salmon when ageing creating an attractive, two-toned effect. Very early flowering and floriferous all summer. Excellent for borders or containers.
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    • 1 packet (30 cosmos seeds)

    • Despatch: Within 1 days
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    • £2.99

Petunia grandiflora 'Double Cascade Blue' F1 Hybrid

Attractive, large fully double blooms in the deepest velvety blue, almost look black when shimmering in the sunshine. The flowers have an added bonus of quickly recovering after a shower of rain. Their cascading habit makes them ideal as groundcover or tumbling over the sides of containers or baskets. Height: 23-30cm (9-12in) 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 (30 petunia seeds)

    • Despatch: Within 1 days
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    • £3.39