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 14 products.
 
Ageratum Houstonianum 'Blue Danube' F1

Ageratum houstonianum 'Blue Danube' F1 Hybrid

Floss Flower
A large-flowered, vigorous variety of annual ageratum with powder-puff flower heads of soft, lavender blue. The fluffy, weather resistant blooms are particularly attractive to butterflies. With a dense, compact habit, Ageratum houstonianum ‘Blue Danube’ is perfect for adding texture and colour to bedding, borders and containers. Height: 20cm (8”). Spread: 25cm (10”). More info
    • 1 packet (100 seeds)

    • Despatch: Within 2 Days
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    • £2.99
Lobelia 'Blue Wings'

Lobelia erinus 'Blue Wings'

On T&M's trials we believe we have found the largest flowered bedding lobelia available. Exceptionally abundant cobalt blue flowers cover compact mounds of foliage. With superb weather resistance Lobelia ‘Blue Wings’ makes a sparkling addition to beds, containers, flower Pouches® and window-boxes. An easy to grow annual that is deservedly popular for its versatility and long flowering period. Height: 15cm (6”). Spread: 20cm (8”). More info
    • 1 packet (1000 seeds)

    • Despatch:
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    • £2.99
    • Out of stock
Brachyscome Iberidifolia Little Missy

Brachyscome iberidifolia 'Little Missy'

Swan River Daisy, Brachycome

 Each pretty lilac blue, daisy-like bloom has a distinctive yellow central eye surrounded by a white halo. Brachyscome ‘Little Missy’ blooms over a long period, making it perfect for edging paths and borders or as an eye-catching container plant on a sunny patio. Height and spread: 25cm (10"). More info
    • 1 packet (200 seeds)

    • Despatch: Within 2 Days
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    • £1.99
Lobelia 'Crystal Palace'

Lobelia erinus 'Crystal Palace'

Dainty, deep blue lobelia flowers smother neat globes of foliage that form very dwarf, compact plants. Lobelia ‘Crystal Palace’ makes a sparkling addition to beds, containers, flower Pouches® and window-boxes, and even looks well placed in the rockery. An easy to grow annual that is deservedly popular for its versatility and long flowering period. Height: 10cm (4”). Spread: 15cm (6”). More info
    • 1 packet (2500 seeds)

    • Despatch: Within 2 Days
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    • £2.09
Lobelia 'Cambridge Blue'

Lobelia erinus 'Cambridge Blue'

A compact variety that holds an RHS AGM for its excellent garden performance. Clear sky-blue lobelia flowers are set above narrow, airy foliage on compact plants. Lobelia ‘Cambridge Blue’ makes a sparkling addition to beds, containers, flower Pouches® and window-boxes, and even looks well placed in the rockery. An easy to grow annual that is deservedly popular for its versatility and long flowering period. Height: 10cm (4”). Spread: 15cm (6”). More info
    • 1 packet (2500 seeds)

    • Despatch: Within 2 Days
    •  
    • £2.09
Ageratum Houstonianum 'Blue Mink'

Ageratum houstonianum 'Blue Mink'

Floss Flower
 Customer Rating
This relatively old variety of flossflower remains popular for good reason. The compact, uniform plants bear large, fluffy, powder-blue flowers. With a vigorous, open habit, Ageratum houstonianum ‘Blue Mink’ is perfect for adding texture and colour to bedding, borders and containers. Try growing ageratum in wildlife gardens where they will attract butterflies to their blooms. Height: 30cm (12”). Spread: 30cm (12”). More info
    • 1 packet (1500 seeds)

    • Despatch: Within 2 Days
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    • £1.99
Lobelia 'Paper Moon'

Lobelia erinus 'Paper Moon'

One of the best compact, pure white varieties available with early flowers that have a remarkably high percentage of true colour. Lobelia ‘Paper Moon’ makes a sparkling addition to beds, containers, flower Pouches® and window-boxes, and even looks well placed in the rockery. An easy to grow annual that is deservedly popular for its versatility and long flowering period. Height and spread: 20cm (8”). More info
    • 1 packet (1500 seeds)

    • Despatch: Within 2 Days
    •  
    • £2.89
Brachycome Iberidifolia Bravo

Brachyscome iberidifolia 'Bravo'

Swan River Daisy, Brachycome

 An exciting mixture of the "Swan River Daisy" in three distinct bright colours: white, blue and violet, each with a striking black centre - plus a few surprise colour combinations too. A valuable bedding and container plant. Awarded a Fleuroselect Quality Mark. Flowers summer. Height: 20-25cm (8-10in). More info
    • 1 packet (175 seeds)

    • Despatch: Within 2 Days
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    • £2.49
Phlox Drummondii 'Dwarf Beauty Mixed'

Phlox drummondii 'Dwarf Beauty Mixed'

Annual Phlox

 A beautiful annual which blooms throughout a long summer season. It produces large solid heads of bright rich colours on dwarf bushy plants. Admirable for filling out summer beds sowing in drifts etc, and the flowers are splendid for cutting. Autumn sown plants make fine spring flowering pot plants for the cool greenhouse. Flowers early summer to autumn. More info
    • 1 packet (200 seeds)

    • Despatch: Within 2 Days
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    • £2.19
Lobelia 'String Of Pearls'

Lobelia erinus compacta 'String of Pearls'

A well balanced mixture of the brightest colours for a dazzling, long lasting summer display. Lobelia ‘String of Pearls’ makes a sparkling addition to beds, containers, flower Pouches® and window-boxes, and even looks well placed in the rockery. An easy to grow annual that is deservedly popular for its versatility and long flowering period. Height: 10cm (4”). Spread: 15cm (6”). More info
    • 1 packet (2500 seeds)

    • Despatch: Within 2 Days
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    • £2.49
Begonia Boliviensis

Begonia boliviensis

With its bright orange, bell-shaped flowers which cover the plant from late spring throughout the summer, Begonia Boliviensis is a delightful, easy-to-grow begonia that is perfect in containers, hanging baskets and as a landscape plant. Of special historical interest to gardeners, begonia boliviensis was introduced to Europe in 1864 and is one of the species used to produce the first hybrid tuberous begonia in England. Height: 45-60cm (18-24in) with a similar spread and trailing length. More info
    • 1 packet (100 seeds)

    • Despatch: Within 2 Days
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    • £2.99
Phlox Hybrida Compacta 'Peppermint Candy'

Phlox hybrida compacta 'Peppermint Candy'

Delicious sparkling red, green and white striped flowers, appear like small, crystallised sweeties above the neat compact mounds of foliage, creating a mouthwatering display on a sunny patio. More info
    • 1 packet (80 seeds)

    • Despatch: Within 2 Days
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    • £1.49