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 32 products.
 

Zinnia elegans 'Purple Prince'

 Customer Rating

Outstanding in Thompson & Morgan trials, these robust plants show excellent garden performance, flowering over a long period and producing an abundance of fully double, deep pink-purple, dahlia-like flowers. This is a taller-than-usual variety of zinnia which will add colour and height to border displays as well as to cut flower arrangements. Zinnia Purple Prince will flower all summer until the first frosts, attracting bees and butterflies as well as the admiration of your neighbours!

More info
    • 1 packet (100 zinnia seeds)

    • Despatch: Within 1 days
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    • £1.99

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).

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    • 1 packet (75 petunia seeds)

    • Despatch: Within 1 days
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    • £2.99 £0.99

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

Petunia hybrida 'Purple Tower' F1 hybrid

  •  Customer Rating
    Fastest climbing petunia from seed
Petunia hybrida 'Purple Tower' comes straight from T&M's own breeding programme. Long stems and astonishing vigour make this the fastest climbing petunia available from seed - easily scaling a 120cm (4ft) climbing frame by the end of the summer. Train the free-flowering stems onto a plant climbing support for a pillar of fragrant blooms, or let them spread through beds and borders as a carpet of colourful ground cover. The perfect focal point for your garden this summer! Height and spread: 120cm (48").
More info
    • 1 packet (30 petunia seeds)

    • Despatch: Within 1 days
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    • £2.69

Petunia x hybrida 'Purple Velvet' F1 Hybrid

The best ever basket petunia from seed! 'Purple Velvet' out-performs expensive cutting raised Surfinia petunias. Trailing stems, up to 1m (3ft) in length, are continuously smothered in velvety, purple blooms until the first frosts.Excellent for baskets and containers. Can also be planted in borders where it will make very effective ground cover. 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 (12 petunia seeds)

    • Despatch: Within 1 days
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    • £3.99

Heliotrope 'Dwarf Marine'

Heliotropium, Cherry Pie, Heliotropium peruvianum

Once you've experienced the sweet, pungent scent, coming from Heliotrope, or 'cherry pie' as it is commonly called, on a still summer evening you won't want to be without it. Few plants can fill the air with such a heady fragrance as this. Marine is a royal purple, large flowered yet compact form with attractive, dark green foliage and bushy habit. Excellent for beds, borders and as a summer flowering pot plant. Flowers summer. Height 45cm (18in). More info
    • 1 packet (150 heliotrope seeds)

    • Despatch: Within 1 days
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    • £2.99

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

Phlox drummondii 'Cherry Caromel'

Annual Phlox

Sow this beauty straight outdoors or raise in modules for extra early colour! An extra special Phlox for beds, borders and containers. You won't be able to resist the fantastically rich caramel flowers with vibrant cherry centres! Let it take pride of place at the front of your border, or in specially-chosen patio containers. Phlox drummondii 'Cherry Caromel' is a plant to show off with, make sure to cut some for vase displays too! Height: 25cm (10"). Spread: 30cm (12"). More info
    • 1 packet (200 phlox seeds)

    • Despatch: Within 1 days
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    • £1.69

Nicotiana x sanderae 'Perfume Deep Purple' F1 Hybrid

Tobacco Plant

 Customer Rating
This fashionable deep-purple color adds a touch of class to summer displays when planted en-masse in borders. Ideal for container plantings, as well as filling the evening air with its delicate perfume.
More info
    • 1 packet (50 nicotiana 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).
More info
    • 1 packet (40 salvia seeds)

    • Despatch: Within 1 days
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    • £0.99