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Keeping you updated – Thompson & Morgan is operating as usual, working 24/7 to keep the country gardening. We are working closely with nurseries and growers to ensure that millions of plants are not wasted. Our site features many of these offers and we will add more every day, passing on these amazing deals to our customers.

Vita Sementi® Italian Seeds, T&M, Under £20, Hardy, Blue

6164 products, 777 articles, 855 blogs

Lavender 'Munstead'

1 Review

Neat, dwarf variety, strongly fragrant producing a prolific quantity of deep blue flowers. Perfect for hedging and cut flowers and ideal for drying. Flowers summer. Height: 30-60cm (1-2ft).  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

Just£2.99

within 21 working days

Ceanothus thyrsiflorus var. repens

38 Reviews

Ceanothus Thyrsiflorus Repens (Californian Lilac) is perfect for the front of a border as it naturally forms a small mound that is evergreen and frost hardy. It is perfect for adding some structure and ground cover to cottage gardens and prefers a position in rich…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

7 Options From£8.99

by the end of august 2020

Agapanthus Duo Collection

34 Reviews

This magnificent mix combines blue Agapanthus 'Flower of love? and the first ever bicolour Agapanthus 'Twister' for a striking two tone display  More Info

  • Sun shade: sun or semi shade
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

Just£11.39

Rosemary

6 Reviews

Essential with roast lamb, the dark green aromatic foliage of rosemary has a multitude of culinary uses. This shrubby evergreen is ideal for a sunny herb garden and even survives in poor soils, requiring very little maintenance. Height and spread: 150cm (59).  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

Just£2.29

within 21 working days

Agapanthus africanus 'Twister'

85 Reviews

Here's a plant that will stand out from the crowd in your garden - the first ever deciduous bicolour agapanthus. This African lily is robust, and truly hardy in the UK meaning it's perfect in the garden border as well as in a patio container.  More Info

  • Sun shade: Sun or semi shade
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

5 Options From£11.39

within 21 working days

Delphinium x cultorum 'Centurion Lilac Blue Bicolour' F1 Hybrid

5 Reviews

UK Exclusive. One of the very best delphiniums from seed, equal in quality to expensive cutting-raised plants. The tall, sturdy stems of Delphinium Centurion Lilac Blue Bicolour are covered in truly stunning bi-coloured blooms with triple-layered petals in lilac and…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

Just£2.99

within 21 working days

Agapanthus 'Fireworks'

147 Reviews

For stunning, exotic looking blue and white blooms that burst at the end of tall stems like a fireworks in your flower bed, look no further than this amazing African Lily. An easy to keep variety that will get bigger and produce more flowers each year.  More Info

  • Sun shade: sun or semi shade
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

2 Options From£8.99

within 21 working days

Sage

2 Reviews

The soft blue-green leaves of sage are ideal for adding their rich flavour to meats and stuffing. This hardy sub-shrub is an essential herb for adding to the Sunday roast but also makes an attractive plant in the perennial border. The flavour of the leaves will be best…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

Just£2.29

within 21 working days

Geranium bohemicum 'Orchid Blue'

13 Reviews

Geranium 'Orchid Blue' is a selection by Thompson & Morgan from the species Geranium bohemicum. A short-lived border and ground cover plant which self-seeds to keep continuity. Masses of 2cm (0.75in) flowers of orchid-blue, veined in purple-violet, borne on bushy plants…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

Just£4.19

within 21 working days

Fuchsia 'Delta's Sarah' (Hardy)

15 Reviews

This beautiful bush variety produces a succession of supremely weather resistant, unusual coloured blue flowers, up 6cm (2) in diameter. The semi-double blooms of hardy Fuchsia 'Delta's Sarah' make a spectacular display in borders and patio containers year after year,…  More Info

  • Sun shade: sun or semi shade
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

3 Options From£16.99

within 21 working days

Rosemary 'Roman Beauty'

2 Reviews

Rosemary bushes are instantly recognisable for their silvery stems and aromatic, dark green foliage. This variety has a charming arching habit that gives it a dense, uninhibited appearance.  More Info

  • Sun shade: full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

3 Options From£17.39

within 21 working days

Campanula pyramidalis (Mixed)

3 Reviews

One of the most striking perennials for the border or patio containers. Giant, slender spikes of blooms reach skywards, in shades of blue and white. Plant in containers either side of your front door for a colourful box or bay tree substitute!  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

Just£2.99

within 21 working days

Borage

5 Reviews

A beautiful hardy annual herb with rough leaves covered in silvery hairs and the most attractive celestial blue flowers. Nectar rich borage flowers are particularly attractive to pollinating insects, including bees which make distinctive flavoured borage honey. This…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Annual

Just£2.29

within 21 working days

Agapanthus 'Ever Sapphire'

4 Reviews

Agapanthus 'Ever Sapphire? is a semi-dwarf variety which produces multiple spikes of bright blue flowers all summer in a sunny or partly shaded position. Agapanthus are tough, fast growing and drought tolerant, these plants are a real 'must-have? for any style of garden…  More Info

  • Sun shade: sun or semi shade
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

2 Options From£11.39

within 21 working days

Myosotis sylvatica 'Blue Ball'

2 Reviews

Compact and ball shaped with bright blue flowers.  More Info

  • Sun shade: Sun or semi shade
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Biennial

Just£2.29

within 21 working days

Lavender 'Ellagance Sky'

8 Reviews

A stunning first year flowering Lavender with large, attractive, fragrant, sky-blue spikes on strong stems, reaching out from bushy well branched plants. A long lasting addition to borders or containers, attracting bees and butterflies to your garden. Height: 30-35cm …  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

Just£1.00

within 21 working days

Meconopsis grandis

7 Reviews

Sturdy and long-lived with huge flowers 10-12cm (4-5in) across in a wonderful blue, shot with violet on erect stems  More Info

  • Sun shade: Sun or semi shade
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

Just£3.99

within 21 working days

Agapanthus 'Ever' Duo

7 Reviews

A truly wonderful agapanthus double act! Agapanthus 'Ever? Duo are semi-dwarf plants that produce multiple spikes of bright blue and pure white flowers all summer in a sunny or partly shaded position. Tough, fast growing and drought tolerant, these plants are a real …  More Info

  • Sun shade: sun or semi shade
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

Just£14.39

within 21 working days

Hebe 'High Voltage'

7 Reviews

Hebes offer impact and structure in the garden for minimum effort. We've selected this slow-growing, compact variety for its stand out summer flower spikes, which transform from electric blue to pure white. Hebe 'High Voltage' performs perfectly in large pots or out in…  More Info

  • Sun shade: Sun or semi shade
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

2 Options From£11.39

by the end of august 2020

Aquilegia caerulea

5 Reviews

Possibly the most beautiful Aquilegia of all. With glorious light to deep blue flowers 2-3in across sometimes fetching bi-coloured with white. An excellent border perennial, grand for cutting, in bloom for several weeks and will grow in sun or light shade. Flowers late…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

Just£2.99

within 21 working days

Clematis 'New Love'

49 Reviews

This fabulous herbaceous Clematis has a self supporting, bush forming habit that is perfect for bulking up perennial borders with vigorous clumps of dense foliage. The star-shaped, indigo blooms of Clematis 'New Love' have slender, reflexed petals and a lovely sweet…  More Info

  • Sun shade: Sun or semi shade
  • Grows in: Walls & Fences
  • Flower Colour: Blue
  • Longevity: Perennial

5 Options From£11.99

within 21 working days

Scabious 'Oxford Blue'

4 Reviews

An easy to grow annual, producing tall stems covered in masses of stunning, mid-blue, pin cushion flowers. A classic cottage garden plant, ideal for cutting and loved by bees and butterflies. Beautiful plants for the cottage border  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Annual

Just£1.99

within 21 working days

Vinca minor

0 Reviews

If you are looking for a plant that will bloom all summer long, then look no further than Lesser Periwinkle. One of the most resilient plants that you can buy, this vigorous, low grow shrub will grow happily in nearly any garden position, from full sun to dark, shady…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

4 Options From£14.39

within 21 working days

Lilac 'Katherine Havemeyer'

5 Reviews

Making a glorious show of late spring colour, this beautiful Lilac has lavender-blue flowers and heart-shaped foliage. The colourful blooms of Syringa 'Katherine Havermeyer' are rich in nectar and attract butterflies to the garden. This is a fast growing variety which…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

4 Options From£9.99

by the end of august 2020

Delphinium x cultorum 'Tall Black Knight'

8 Reviews

Tall, robust, candle-like flower spikes packing with attractive, deep blue blooms, each complemented by a striking large black bee in the centre. A stunning addition to any border. Height: 120-150cm (4-5ft)  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

Just£3.59

within 21 working days

Hyssopus officinalis 'Tricolour Mixed'

5 Reviews

A beautifully aromatic herb with a pungent tang suitable for meat dishes, beans and salads. Hyssop makes an attractive plant for the border where it will attract bees and butterflies. This exclusive blend brings together a pretty mix of blue, pink and white blooms.…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

Just£0.99

within 21 working days

Cornflower 'Trailing Blue Carpet'

2 Reviews

Cornflowers are a traditional wildflower or annual border addition. Now you can bring them to yourbaskets and container displays thanks to the relaxed prostrate habit of 'Trailing Blue Carpet?. Perfect for path and border edging. Height 10cm (4in).  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Annual

Just£1.99

within 21 working days

Cornflower 'Jubilee Gem'

4 Reviews

Dense heads of large, double flowers of a beautiful deep blue are freely produced on compact, bushy plants. Once a common sight in cornfields the annual cornflower stills creates a big impact in summer borders and meadows. The intensely coloured blooms of blue…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Annual

Just£2.29

within 21 working days

Cornflower 'Dwarf Blue Midget'

4 Reviews

A fantastic little cornflower rather like a ball of colour. Lower and neater than any we believe you will have seen before. Full of bloom at 15cm (6in) high. Ends up about 30cm (12in) high. Easy to grow and suitable for beds, borders, containers etc. Flowers summer.…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Annual

Just£2.29

within 21 working days

Eryngium 'Magical Blue Globe'

1 Review

Sea Holly makes a superb hardy perennial for hot, sunny borders. Thriving on gritty soils, they are tough, resilient and reliable. This variety boasts a compact habit, and attractive, sculpted foliage. The silvery stems are topped with domed flowers and surrounded by a…  More Info

  • Sun shade: full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

2 Options From£14.39

within 21 working days

Nigella 'Blue Starry Skies'

7 Reviews

An excellent annual for growing in almost any area of the garden. The mix of striking blue blooms float on top a sea of fennel-like foliage. Scatter seed wherever you want to bring a splash of blue. Height and spread 45cm x 30cm (18 x 12in).  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Annual

Just£1.00

within 21 working days

Nepeta nervosa 'Blue Moon'

4 Reviews

A neat, dwarf, bushy, habit, with large dense blue flower spikes, over a very long period. Quick to flower in 12-16 weeks from an April sowing. Ideal for borders and containers. Height: 30-40cm (12-16in)  More Info

  • Sun shade: Sun or semi shade
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

Just£3.29

within 21 working days

Cornflower 'Blue Diadem'

6 Reviews

Powder puff Cornflowers of intense azure blue were once a common sight in summer, dotted throughout golden cornfields. This charming annual still makes an unforgettable impact in grassy meadows and summer borders. Its tall wiry stems and ruffled blooms make Cornflower …  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Annual

Just£2.99

within 21 working days

Echinops ritro

0 Reviews

Make a strong statement with this architectural plant, it will be a great contrast with the more traditional softer flowers in your garden designs. The stand-out features are the spiky globes of electric blue flowers that stand proudly on silvery green stems above…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

Just£4.99

Campanula rotundifolia

2 Reviews

The pretty British Harebell otherwise known as the bluebell of Scotland, produces thin wiry stems of nodding pale blue flowers. An easy, charming plant for rockery, border etc  More Info

  • Sun shade: Sun or semi shade
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Perennial

Just£2.99

within 21 working days

Perovskia 'Blue Spire'

7 Reviews

Whether you are a first time gardener hoping to create a perfect cottage garden or an old hand struggling to enhance tricky costal areas, it is worth considering Perovskia 'Blue Spire'. This Russian Sage is easy to maintain, even in dry and windy areas. The hardy shrub…  More Info

  • Sun shade: Full sun
  • Grows in: Borders
  • Flower Colour: Blue
  • Longevity: Shrub

5 Options From£10.19

within 21 working days

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