Loading...
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.

Blue, Black, Perennial

5915 products, 777 articles, 855 blogs

Primula capitata 'Noverna Deep Blue'

8 Reviews

First year flowering. Attractive deep blue flower heads, held aloft by intriguing powdery white stems, above contrasting grey-green foliage. Adds an eye-catching display to borders and containers from summer into autumn. Height: 25-30cm (10-12in)  More Info

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

Just£3.99

within 21 working days

Pulmonaria 'Blue Ensign'

0 Reviews

An RHS AGM winner, Pulmonaria 'Blue Ensign' has clear blue flowers formed in clusters from March to May. Unlike many Lungwort cultivars, the green leaves of Pulmonaria 'Blue Ensign' don't have the typical pale spots and are broader and more refined, creating low…  More Info

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

2 Options From£17.39

within 21 working days

Cichorium intybus 'Electric Blue'

2 Reviews

The wild form of the vegetable Chicory makes a beautiful addition to a cottage garden border. Electric blue flowers are produced on the many, breezy stems throughout summer. Be quick to enjoy their beauty, as the flowers always close by midday!  More Info

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

Just£4.79

within 21 working days

Scabious 'House's Novelty Mix'

1 Review

A truly elegant border perennial with blooms in blue, mauve and white on long slender stems which are much in demand for cut flowers. Flowers summer. Height 30in  More Info

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

Just£2.99

within 21 working days

Agastache foeniculum

1 Review

Silvery-green foliage which is scented unmistakenly of Aniseed. Flower spikes of blue appear during summer. Bees, butterflies and goldfinches love it!  More Info

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

Just£3.29

within 21 working days

Linum narbonense 'Heavenly Blue'

4 Reviews

One of the finest blue flowered plants. A profusion of luminous ultra-marine blue flowers  More Info

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

Just£3.99

within 21 working days

Heteropappus meyendorfii 'Blue Knoll'

8 Reviews

Seed of this amazing new garden plant can be sown early in the year* and by the same autumn will be completely smothered in hundreds and thousands of shiny, light reflecting flowers, forming perfect mounds (or knolls) 30cm (12in) high and 45cm (18in) across. During a…  More Info

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

Just£1.79

within 21 working days

Catananche caerulea 'Amor Blue'

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

Just£0.99

within 21 working days

Corydalis flexuosa 'Purple Leaf'

0 Reviews

Corydalis flexuosa 'Purple Leaf' makes an often admired, unusual garden plant. These Corydalis may look delicate, but they're pretty tough, and enjoy our cool English summers. Flowering can often last from late spring until mid-summer, effortlessly forming clumps in…  More Info

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

2 Options From£14.39

within 21 working days

Mr. Men™ Little Miss™ Salvia patens

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

Just£2.99

within 21 working days

Geranium 'Rozanne'

81 Reviews

Winner of The RHS Chelsea Flower Show 'Plant of the Centenary'. A celebrated Cranesbill producing masses of saucer shaped, violet blue blooms with dainty white centres. Repeat flowering throughout the summer, hardy Geranium 'Rozanne' makes excellent ground cover through…  More Info

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

6 Options From£6.99

within 21 working days

Out of Stock

Lupin 'The Governor'

1 Review

Lupin 'The Governor' brings a contemporary look to conventional garden designs. Its striking white and purple flowers bloom vigorously from early summer onwards. A hardy perennial, Lupin 'The Governor' produces fine elegant blooms, comprising delicate clusters of…  More Info

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

2 Options From£13.19

within 21 working days

Out of Stock

Campanula poscharskyana 'Blue Waterfall'

3 Reviews

A new twist on a much-loved garden favourite, 'Buzz'® is the world's first patio buddleja! These attractive, compact plants are loved by bees and butterflies, but won't take over your garden. Buddleja '® Ivory' is easy to grow and problem-free with a super long…  More Info

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

3 Options From£20.39

Out of Stock

Delphinium 'Summer Skies' (Pacific Hybrid)

2 Reviews

Beautiful sky-blue flowers form tall, soft spires above neat clumps of foliage. A classic cottage garden perennial, Delphinium 'Summer Skies' is perfectly at home in sunny herbaceous borders, where it's statuesque flowers add vertical interest and eye-catching colour…  More Info

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

2 Options From£14.99

within 21 working days

Out of Stock

Brunnera macrophylla 'Jack Frost'

8 Reviews

Brunnera macrophylla 'Jack Frost' produces elegant sky blue flowers in spring above neat clumps of foliage. The big heart-shaped leaves are a sparkling silver colour that will brighten up even the shadiest borders. This hardy perennial makes good groundcover and can be…  More Info

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

3 Options From£19.19

within 21 working days

Out of Stock

Agapanthus 'Northern Star'

6 Reviews

Agapanthus 'Northern Star' is very free flowering, forming masses of umbel flower heads all through summer. The stunning deep blue flowers have a purple stripe the same as the purple base of the semi-evergreen foliage. A tall African Blue Lily, ideal in the middle of…  More Info

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

3 Options From£19.19

within 21 working days

Out of Stock

Campanula persicifolia 'Caerulea'

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

2 Options From£13.19

Out of Stock

Brunnera 'Alexander's Great'

11 Reviews

* New in 2015If you are looking for a statement plant then try this big robust silver beauty! Easy to care for, the heavily silver-veined leaves will make a dramatic impact in borders and containers. Sprays of sky-blue flowers atop wirey stems will appear from spring.  More Info

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

2 Options From£9.99

by the end of september 2020

Out of Stock

Meconopsis baileyi 'Blue'

7 Reviews

Is there a more beautiful bloom in the entire flower kingdom then the famous Blue Poppy? The large bowl shaped blooms will have a dramatic effect and are certainly worth a place in your garden.  More Info

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

3 Options From£11.99

by the end of september 2020

Out of Stock

Hardy Geranium Duo (Cloud Nine + Rozanne)

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

2 Options From£14.99

within 21 working days

Out of Stock

Agapanthus 'Black Magic'

0 Reviews
  • Sun shade: sun or semi shade
  • Grows in: Borders
  • Flower Colour: Black
  • Longevity: Perennial

Just£18.99

within 21 working days

Out of Stock

Agapanthus 'Full Moon'

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

2 Options From£16.99

within 21 working days

Out of Stock

Delphinium elatum 'Paramo Azul'

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

3 Options From£9.99

by the end of august 2020

Out of Stock

Salvia microphylla 'Blue Monrovia'

0 Reviews

Salvia microphylla 'Blue Monrovia' is a bushy, shrubby perennial. In mild areas it may remain evergreen, although generally considered a semi-evergreen where winters are harsh and the plants are given no protection. This pretty Sage forms an upright clump of small, grey…  More Info

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

2 Options From£28.79

by the end of july 2020

Out of Stock

Salvia Salgoon 'Lake McKenzie'

0 Reviews

Salvia Salgoon 'Lake McKenzie' is a new introduction that?s sure to be a hit with UK gardeners. A sublime display of indigo blue flowers are borne on black stems throughout the summer. The nectar-rich blooms are loved by pollinating insects.  More Info

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

Just£7.99

within 21 working days

Out of Stock

Veronica spicata 'Glory'

1 Review

Small in stature but big in impact! Veronica spicata 'Glory' produces lots of large purple-blue, upright flower spikes above neat clumps of foliage. Flowering in abundance from June to August, this herbaceous perennial is ideal for adding summer colour to the front of…  More Info

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

4 Options From£13.19

within 21 working days

Out of Stock

Meconopsis 'Union Jack' Collection

54 Reviews

We've put together a collection of these wonderful perennial poppy plants for you for a patriotic display in your summer border: Meconopsis Napaulensis, Meconopsis baileyi 'Alba' and Meconopsis baileyi.  More Info

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

2 Options From£21.59

by the end of september 2020

Out of Stock

Veronica 'Pink Harmony'

7 Reviews

A striking architectural plant producing erect flower spikes with attractive, silver-green foliage. Veronica 'Pink Harmony' has pale pink flowers which contrast beautifully with the hot pink stamens creating a stunning 'flash' of vivid colour  More Info

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

2 Options From£8.49

by the end of november 2020

Out of Stock

Pulmonaria 'Moonshine'

1 Review

When this showy Lungwort starts to flower, its a welcome sign that spring is on the way! Pulmonaria 'Moonshine' is a stunning, herbaceous perennial grown for its mound of sparkling, silvery-grey, rounded leaves that are edged with dark green.  More Info

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

2 Options From£28.79

by the end of july 2020

Out of Stock

Muscari armeniacum

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

3 Options From£8.99

by the end of august 2020

Out of Stock

Clematis 'Guiding Promise'™ evipo053

0 Reviews

Iris setosa 'Baby Blue' is a charming little Iris of petite proportions, reaching just 20cm (8) tall. Violet veins decorate the lavender-blue petals, which are splashed with white at the centre of each bloom.  More Info

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

2 Options From£35.99

within 21 working days

Out of Stock

Salvia patens 'Blue Angel'

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

Just£14.99

within 21 working days

Out of Stock

Agapanthus 'Jacaranda'

0 Reviews

Blooming from as early as June, Agapanthus 'Jacaranda' is a useful early flowering variety. Its showy umbels of blue flowers are beautifully striped with a darker blue, adding a height to herbaceous borders, where the sturdy upright stems will make a lovely focal point.…  More Info

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

2 Options From£26.39

within 21 working days

Out of Stock

Eryngium alpinum

1 Review

This stylish perennial, produces upright, blue stems, topped with dramatic thistle-like blooms. The flower heads are cone shaped, surrounded by a lacy collar of spiky bracts, making a superb architectural focal point in borders.  More Info

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

Just£6.99

by the end of november 2020

Out of Stock

Clematis 'Crystal Fountain'

0 Reviews

Clematis 'Crystal Fountain' is terrifically floriferous, in bloom throughout the summer and into early autumn. A fountain of crystal-blue stamens radiates from the centre of each dazzling blue, 15cm (6) wide bloom, and this variety's compact habit makes it ideal for…  More Info

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

2 Options From£21.59

within 21 working days

Out of Stock

Agapanthus 'Sweet Surprise'

0 Reviews

Agapanthus 'Sweet Surprise' sports umbels of pale blue flowers between late June and August. Each flower has a charming star-shape once opened fully and a dark blue stripe down the centre of each petal. With stiff, upright stems that rise above clumps of strap-like,…  More Info

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

2 Options From£26.39

within 21 working days

Out of Stock
RedEye

Join the T&M Gardener's Club