Blue cornflowers

Plants with blue flowers

Add cool blues to outdoor spaces with some of our favourite blue-flowered plants.

Blue flowers are fairly uncommon, but combine well with many plants in the garden.

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For shade, include lots of light and white-flowered plants to perk up dark corners. In sunnier spots, try combining them with orange or red flowers for a vibrant look.

You could also try a wildflower meadow, combining cornflower blues with field poppies, ox-eye daisies and corn marigolds.

Many ‘blue-flowered’ plants are closer to purple than blue, so we’ve been sure to include plenty of true blue flowers in our lineup.

To let the blue flowers really sing, grow alongside foliage plants like ferns and ornamental grasses.

Discover some of the best plants with blue flowers to grow, below.

Blue-flowered plants combine well with most colours – for shade, include lots of light and white-flowered plants.

Cornflowers

Blue cornflowers
Blue cornflowers

Wildflower meadows wouldn’t be the same without blue cornflowers dotted amongst the other blooms. Grow in full sun in well-drained soil, and combine with field poppies, corn marigolds, ox-eye daisies and dill.


Forget-me-nots

Tiny blue forget-me-not flowers
Tiny blue forget-me-not flowers

Ever reliable forget-me-nots are prolific self-seeders, producing carpets of spring blooms – perfect for combining with tulips and wallflowers. For ponds, try the water  forget-me-not, Myosotis scorpioides.


Anchusa

Purple-blue, tiny flowers of Anchusa azurea 'Loddon Royalist'
Purple-blue, tiny flowers of Anchusa azurea ‘Loddon Royalist’

Like borage, Anchusa species have intense blue flowers and bristly foliage. They’re also popular plants for pollinators and are slug-resistant. Grow in full sun in moist, well-drained soil and enjoy the edible flowers. Cultivars to grow include ‘Loddon Royalist’ and ‘Dropmore’.


Gentians

Striking blue of Gentiana sino-ornata
Striking blue of Gentiana sino-ornata

Gentians are prized for their vivid blue blooms. Gentiana sino-ornata is said to be the easiest to grow and there are lots of cultivars to choose from. They’re ideal for rock gardens and alpine displays, and perform best in neutral to acid soils. Flowers in autumn.


Anemone obtusiloba

Pastel blue flowers of Anemone obtusiloba
Pastel blue flowers of Anemone obtusiloba

Unlike wood anemones and rue anemones, Anemone obtusiloba is an alpine species with pretty, watercolour-blue flowers. Similar anemones to grow include blue-flowered Anemone blanda and Anemone nemorosa ‘Robinsoniana’.


Ceratostigma

Tiny, intensely blue flowers and dark pink foliage of Ceratostigma willmottianum
Tiny, intensely blue flowers and dark pink foliage of Ceratostigma willmottianum

Ceratostigmas to grow include Ceratostigma plumbaginoides and Ceratostigma willmottianum, the former being smaller and herbaceous. Both have intensely blue blooms and enjoy growing in a well-drained soil in full sun.


Meconopsis

Blue Himalayan poppy flowers
Blue Himalayan poppy flowers

The flowers of many Himalayan poppies (Meconopsis) are a gorgeous, true blue. They like shady conditions so are ideal for a moist, shady border. Find out how to grow meconopsis in this video with Monty Don.


Salvias

Bright blue flowers of Salvia 'Oxford Blue'
Bright blue flowers of Salvia ‘Oxford Blue’

Blue-flowered salvias are usually have either indigo or true blue flowers. For true blue blooms, try growing cultivars like ‘Oxford Blue’, ‘Cambridge Blue’ or ‘Dot’s Delight’. For best results, grow in a well-drained soil in full sun.


Eryngiums

Thistle-like blue and silver flowers of sea holly
Thistle-like blue and silver flowers of sea holly

Eryngiums, or sea hollies, are striking perennials with electric blue flowers. They enjoy full sun, so try growing them in a hot, gravel garden alongside plants like echinops and verbascums. Slug-resistant.


Hydrangeas

A pale blue hydrangea flower
A pale blue hydrangea flower

Hydrangeas are robust, deciduous shrubs, with many blue-flowered cultivars to grow. They can be grown in soils of varying pH levels, but acid soils will keep the flowers blue, while more alkaline soils can turn blooms pink. Discover how to prune hydrangeas.


More plants with edible flowers

Pale yellow rocket flowers
Pale yellow rocket flowers
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