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 30 products.
 

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 lobelia seeds)

    • Despatch: Within 1 days
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    • £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: Within 1 days
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    • £0.99

Petunia grandiflora 'Mirage Blue' F1 Hybrid

Mirage Blue combines the best of both worlds, it has the superb garden performance of the smaller flowered multifloras plus large and showy, up to 7.5cm (3in), richly veined blooms. Recovers quickly from rain, heat or drought and with its compact branching habit is ideal for bedding, window boxes, hanging baskets, tubs etc. Flowers summer. Height: 23cm (9in).

More info
    • 1 packet (75 petunia seeds)

    • Despatch: Within 1 days
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    • £2.99 £0.99

Lobelia erinus 'Blue Splash'

Masses of white flowers splashed with marine blue to give an intriguing and unusual effect. Flowering up to 4 weeks earlier than many trailing lobelia varieties, 'Blue Splash' 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: 25cm (10"). More info
    • 1 packet (1000 lobelia seeds)

    • Despatch: Within 1 days
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    • £1.49 £0.99

Lobelia erinus 'Blue Cascade'

 Customer Rating
Freely branching plants are covered in myriads of bloom to create clouds of true blue lobelia flowers with a small white eye. Unsurpassable among trailing lobelias, 'Blue Cascade' makes a sparkling addition to 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: 25cm (10").
More info
    • 1 packet (1500 lobelia seeds)

    • Despatch: Within 1 days
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    • £2.29

Lobelia pendula 'Monsoon'

  • Attractive late summer bronze foliage
If you liked Lobelia 'Crystal Palace' then this trailing version is sure to appeal. With a vigorous cascading habit and masses of deep blue flowers, Lobelia 'Monsoon' is ideal for filling baskets and containers or spilling over low walls and rockeries. The bright green summer foliage matures to a rich shade of bronze as the autumn approaches for a spectacular late summer display. Height: 15cm (6"). Spread: 30cm (12").
More info
    • 1 packet (650 lobelia seeds)

    • Despatch: Within 1 days
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    • £2.19

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 lobelia seeds)

    • Despatch: Within 1 days
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    • £2.29

Morning Glory 'Heavenly Blue'

Ipomoea tricolor, Ipomoea rubrocaerulea

 Customer Rating
Gorgeous sky blue flowers, up to 6cm (2½in) across that open in the morning, appear throughout summer on this free-flowering, elegant climber. Also suitable for greenhouse or conservatory growing. Prefers a sunny, sheltered, warm site; Beautiful climber ideal for warm site trellis, fences, poles, etc.
More info
    • 1 packet (50 morning glory seeds)

    • Despatch: Within 1 days
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    • £2.69

Salpiglossis sinuata 'Kew Blue'

Painted Tongue

 Customer Rating
Kew Blue adds height and a touch of class to your summer displays. Slender stems bear clusters of velvet-like flowers in an exquisite shade of deepest purple-blue each complemented by a central dark blotch. Sure to attract admiring glances when used in borders or as a cut flower.
More info
    • 1 packet (30 salpiglossis seeds)

    • Despatch: Within 1 days
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    • £0.99

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).
More info
    • 1 packet (40 salvia seeds)

    • Despatch: Within 1 days
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    • £0.99

Phlox drummondii 'Moody Blues'

Annual Phlox

Free flowering in a beautiful range of attractive blue shades, this easy to grow, half hardy annual is a cottage garden classic. Phlox drummondii 'Moody Blues' has a compact bushy habit that makes it ideal for planting in loose drifts at the edge of borders, and performs equally well in containers. Annual Phlox also makes a delightful cut flower so you can enjoy it in your home too! Height: 25cm (10"). Spread: 30cm (12"). More info
    • 1 packet (175 phlox seeds)

    • Despatch: Within 1 days
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    • £1.99

Laurentia 'Avant-Garde Blue' F1 Hybrid

Isotoma, Solenopsis axillaris

T&M's flower breeders have struck gold with the first ever F1 Hybrid Laurentia to be entered into the Fleuroselect trials. Both 'Avant-Garde Blue' and 'Pink' have the same uniform, vigorous plant habit and have earlier scented, star shaped blooms which are produced in abundance over a long flowering season. Your garden will be filled with colour all summer. Height: 25-30cm (10-12in).
More info
    • 1 packet (50 laurentia seeds)

    • Despatch: Within 1 days
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    • £2.49