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.



We have found 69 products.
 

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.

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    • 1 packet (100 cosmos seeds)

    • Despatch: Within 1 days
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    • £2.69

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: Some parts of these flowers are edible. For more details about edible flowers click here.

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    • 1 packet (50 marigold seeds)

    • Despatch: Within 1 days
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    • £2.69

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 '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 sulphureus 'Polidor'

 Customer Rating

A bright, striking mixture of orange, lemon and red shades. The semi-double flowers, of medium size, are borne on bushy plants of fresh, fern-like foliage. Earlier to bloom than many other Cosmos.

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    • 1 packet (200 cosmos seeds)

    • Despatch: Within 1 days
    •  
    • £2.99

Antirrhinum nanum 'Frosted Flames'

Snapdragon

 Customer Rating
The rich carnival of colour produced by this stunning Antirrhinum is perfectly foiled by the unusual, frosted foliage, making the plants a real talking point. Exceptional performance for the summer border.
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    • 1 packet (60 antirrhinum seeds)

    • Despatch: Within 1 days
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    • £0.99

Cosmos bipinnatus 'Rubenza'

 Customer Rating
Wonderfully easy-to-grow plants which flower all summer until the first frosts. The dark, ruby-red blooms of Cosmos bippinatus Rubenza change to a lovely traditional rose red as they mature - their outstanding colour has earned them a Fleuroselect Novelty award. Cosmos bippinatus Rubenza shows excellent garden performance, especially planted in borders in drifts.
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    • 1 packet (60 cosmos seeds)

    • Despatch: Within 1 days
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    • £2.99

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: Within 1 days
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    • £2.49

Ageratum houstonianum 'Timeless Mixed'

Floss Flower

A classic mix of Floss Flowers in gentle shade soft pink, white and blue. The weather resistant, powder puff blooms are supported on tall stems that make this half hardy annual just perfect for cutting. Ageratum houstonianum 'Timeless Mixed' is ideal for filling gaps in borders, adding height and texture to informal planting schemes. A lovely addition to cottage gardens and wildlife borders. Plant it with Bupleurum for a particularly eye catching combination. Height: 50cm (20"). Spread: 30cm (12"). More info
    • 1 packet (100 ageratum seeds)

    • Despatch: Within 1 days
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    • £0.99

Cosmos bipinnatus 'Sonata Series Mixed'

An award winning variety in a superb mixture of colours. This beautiful dwarf Cosmos reaches a maximum height of 60cm (24") making it perfectly proportioned for sunny borders and containers. The 8cm (3") wide, daisy-like blooms of Cosmos 'Sonata Series Mixed' float above the finest lacy foliage. Strong stems and a long vase life make this compact annual ideal for cutting for a colourful bouquet. Cosmos 'Sonata Series Mixed' is particularly useful for exposed positions. Height: Up to 60cm (24"). Spread: 45cm (18").
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    • 1 packet (30 cosmos seeds)

    • Despatch: Within 1 days
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    • £2.69

Cosmos bipinnatus 'Sonata Series White'

A Fleuroselect Award Winning variety with purest white blooms. This beautiful dwarf Cosmos reaches a maximum height of 60cm (24") making it perfectly proportioned for sunny borders and containers. The 8cm (3") wide, daisy-like blooms of Cosmos 'Sonata Series White' float above the finest lacy foliage. Strong stems and a long vase life make this compact annual ideal for cutting for an elegant bouquet. Cosmos 'Sonata Series White' is particularly useful for exposed positions. Height: Up to 60cm (24"). Spread: 45cm (18").
More info
    • 1 packet (100 cosmos seeds)

    • Despatch: Within 1 days
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    • £2.99

Marigold 'Boy O' Boy Mixed'

Tagetes patula, French Marigold

 Customer Rating
Mixed - Neat and compact double crested flowers which are produced prolifically from early June until frosts. A petite bright and cheerful variety very suited for windowboxes and the front of the border as well as bedding, tubs etc. Flowers all summer.

Culinary note: Some parts of these flowers are edible. For more details about edible flowers click here.

More info
    • 1 packet (115 marigold seeds)

    • Despatch: Within 1 days
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    • £2.19