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 25 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!

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    • 1 packet (100 seeds)

    • Despatch: Within 1 days
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    • £1.99

Petunia grandiflora 'Double Cascade Burgundy Plum Vein' F1 Hybrid

Giant, fully double flowers of burgundy or plum veined, often more than 10cm (4in) across! Add to this its cascading habit and you have one of the very best basket and container plants creating a waterfall of pleated powderpuffs all summer long. Height: 23-30cm (9-12in). 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.Click here to buy now. More info
    • 1 packet (25 seeds)

    • Despatch: Within 1 days
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    • £3.69

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").
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    • 1 packet (30 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 seeds)

    • Despatch: Within 1 days
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    • £3.69

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").
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    • 1 packet (650 seeds)

    • Despatch: Within 1 days
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    • £2.19

Petunia grandiflora pendula 'Lady Purple' F1 Hybrid

This genuinely cascading Petunia is smothered in bright purple-pink flowers, each with a black throat. Plants are only 15cm (6in) high and can spread up to 90cm (3ft), making them ideal candidates for all types of container and baskets. Non-stop flowering, even during mild frosts, gales and heavy rain, plants will quickly revive. Because plants are seed raised, you can grow with confidence, assured that there is no risk of virus. Awarded a Fleuroselect Quality Mark. 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 (20 seeds)

    • Despatch: Within 1 days
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    • £4.49

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 (4Ó). Spread: 15cm (6Ó).
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    • 1 packet (2500 seeds)

    • Despatch: Within 1 days
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    • £2.19

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.
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    • 1 packet (30 seeds)

    • Despatch: Within 1 days
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    • £0.99

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 seeds)

    • Despatch: Within 1 days
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    • £2.99

Morning Glory 'Star Of Yelta'

Ipomoea purpurea, Convolvulus purpureus, Pharbitis purpurea

 Customer Rating
A stunning and very striking garden plant which can be used as a climber or ground cover subject. The large flower buds open to royal a deep purple, silk-like, 7cm (3in) bloom with rich red vein markings, forming a star from the very centre to the petal tips. You can also grow it in a container where it will cascade over the side, and if supported, will climb to form a dome. Flowers summer. Climber to approximately 180cm (6ft).
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    • 1 packet (25 seeds)

    • Despatch: Within 1 days
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    • £2.99

Cobaea scandens

Cup And Saucer Vine, Cathedral Bells, Cups And Saucers, Mexican Ivy

 Customer Rating
A showy climber for the cool greenhouse, conservatory, and also forming a very decorative screen on trellis or south facing wall in milder areas. The large bell shaped 'cup and saucer' flowers are often 6cm (2? in) across. Flowers late summer. Climber.
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    • 1 packet (9 seeds)

    • Despatch: Within 1 days
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    • £2.99

Salvia farinacea 'Victoria'

Mealy Sage, Mealycup Sage

Tall, handsome spiky plants which add a touch of elegance to a bed or border. The flower spikes are produced over a long period and are excellent for cutting. A Fleuroselect Bronze Medal Winner. Flowers summer/autumn. Height 18in.
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    • 1 packet (100 seeds)

    • Despatch: Within 1 days
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    • £3.49