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 30 products.
 
Lobelia 'Cascade Mixed'

Lobelia erinus 'Cascade Mixed'

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 Customer Rating

These trailing lobelia plants produce fountains of bloom in burgundy, violet, lilac and Cambridge blue, as well as a few bicolours! Lobelia ‘Cascade’ Mixed 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. Trails to: 25cm (10”). Spread: 15cm (6”).

 More info
    • 1 packet (1500 seeds)

    • Despatch: Within 2 Days
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    • £2.49
Lobelia pendula 'Monsoon'

Lobelia pendula 'Monsoon'

  • NEW in 2013
  • 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 seeds)

    • Despatch: Within 2 Days
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    • £0.99
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
    •  
    • £2.99
Lobelia 'Blue Splash'

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 seeds)

    • Despatch: Within 2 Days
    •  
    • £1.49
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:
    •  
    • £2.99
    • Out of stock
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
    •  
    • £2.09
Rudbeckia Hirta Toto

Rudbeckia hirta 'Toto'

Coneflower, Black-eyed Susan
Dwarf, compact plants which have plenty of strong side shoots and many rich golden-yellow blooms, each with a deep chocolate central cone. Early to flower over a long period and looking great in all types of weather. An ideal candidate for containers, bedding or grown in groups in the border. Flowers summer. Height: 25cm (10in). More info
    • 1 packet (50 seeds)

    • Despatch: Within 2 Days
    •  
    • £2.49
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
Lobelia 'Blue Cascade'

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 seeds)

    • Despatch: Within 2 Days
    •  
    • £2.09
Nicotiana X Sanderae Eau De Cologne Mixed F1 Hybrid

Nicotiana x sanderae 'Eau de Cologne Mixed' F1 Hybrid

Tobacco Plant

 A specially selected blend, offering uniform, mid height plants, in a glowing colour range with upward facing blooms. The evening fragrance adds to their irresistible charm and elegance and is guaranteed to enhance your borders. More info
    • 1 packet (40 seeds)

    • Despatch: Within 2 Days
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    • £2.49
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
    •  
    • £1.99

Lobelia erinus 'Mrs Clibran Improved'

Very useful for edging. Deep-blue flowers with a pretty, contrasting white eye. More info
    • 1 packet (2000 seeds)

    • Despatch: Within 2 Days
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    • £2.09