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Buddleia

Buddleia (Butterfly bush)

Buddleias are vigorous, deciduous shrubs renowned for their ability to attract butterflies and other wildlife to their flowers. They can often be seen colonising derelict sites. The flowers are born (usually) in long spikes on the arching stems. F... more...


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Caryopteris

Caryopteris (Bluebeard, Blue spiraea)

Caryopteris are evergreen shrubs bearing feathery displays of blue flowers in late summer and early autumn. The foliage is scented. Caryopteris grow best in full sun on well-drained soil. Prune hard each spring to encourage flowering. more...


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Ceanothus

Ceanothus (Californian lilac)

Ceanothus are shrubs which grown for their vibrant displays of blue flowers. Plants are either deciduous and flower in the spring or evergreens which flower in summer. The foliage is small, glossy and dark green. Ceanothus require a sunny protecte... more...


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Ceratostigma willmottianum

Ceratostigma willmottianum (Hardy plumbago)

Ceratostigma willmottianum is a deciduous shrub grown for its displays of clear blue flowers in late summer and autumn. Ceratostigmas are only slightly hardy, coping up to zone 8. They require a well drained soil in full sun. Prune hard in late sp... more...



Echium vulgare (Vipers bugloss)

Echium vulgare is a annual or perennial with spikes of blue flowers in the species but other colours are available. The flowers are popular with bees. It requires full sun and a fertile, alkaline soil to grow well. They are hardy up to zone 7. more...



Hebe

Hebes are a large group of evergreen shrubs. The most common varieties have large green or variegated leaves and lax spikes of flowers throughout summer. There are also dwarf and ground cover types which are grown largely for their colourful folia... more...



Hydrangea

Hydrangeas are dense, deciduous bushes bearing very large flowers heads throughout summer. Flower heads are either 'mophead' with a large rounded flower cluster, or 'lacecap' with a center of smaller flowers surrounded by larger four petaled flowe... more...


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Lavandula

Lavandula (Lavender)

Lavandula, or Lavender are very well known small shrubs grown for their plentiful supply of flowers and scented foliage. Flowers are borne throughout summer in colours of blue, purple, pink or white. The flowers are highly attractive to bees and b... more...


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Lithodora diffusa 'Heavenly Blue'

Lithodora diffusa 'Heavenly Blue'

Lithodoras diffusa 'Heavenly Blue' is a compact, low growing shrubs suitable for the alpine border. It displays deep blue flowers from late spring. Lithodoras cope well with wetter soils than most alpines, prefering humus to a gritty soil. It requ... more...


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Perovskia atriplicifolia 'Blue Spire'

Perovskia atriplicifolia 'Blue Spire' (Russian sage)

Perovskia atriplicifola 'Blue Spire' is a small shrub with delicate foliage which smells of sage when crushed. It small blue flowers are borne on feathery spikes from late summer to mid autumn. Perovskia will grow well in a well-drained, slightly ... more...


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Fuchsia

Fuchsia is a large group of deciduous shrubs which flower over a long period from late spring to late summer, and may even continue flowering into winter if conditions are suitable. Flowers some in a wide range of colours from white through to pin... more...



Plumbago

Plumbago (Leadwort)

Plumbagos are perennials and shrubs grown for their usually blue or white flowers borne intermittently throughout summer but mainly in late summer and autumn. Some varieties are scrambling climbers which can be trained against a wall. Plumbagos gr... more...


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Vinca major

Vinca major (Periwinkle)

Vinca major is a spreading groundcover perennials. It bears blue flowers held above the foliage during late spring and summer. Vincas grow in any reasonable soil in sun or semi-shade. more...


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Aconitum (Aconite, Monkshood)

Aconitums are perennials bearing distinctive hooded flowers. Flowers are usually in shades of blue and are borne from early to late summer. The roots are poisonous. Aconitums require fertile soil in full sun or light shade. They are best if mulche... more...



Agapanthus

Agapanthus (African lily)

Agapanthus are perennials with sword shaped leaves and ball shaped heads of either blue or white lily-like flowers. Flowers are borne from mid summer to early autumn. Agapanthus grow best in fertile, well-drained soil in sun. Old clumps can be div... more...


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Ajuga (Bugle)

Ajugas are low growing perennials suitable for ground cover under trees. In spring they bear short spikes of blue flowers. There are a number of selections available with interesting coloured foliage. Ajugas require a shady site in moist soil and... more...


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Aquilegia

Aquilegia (Columbine, Granny's bonnets)

Aquilegias are short lived perennials bearing usually bell-shaped, spurred flowers held above the foliage. Flowers come in colours of pink, white, blue, yellow, red and even purple-black. Flowers are borne from mid spring to early summer. Some var... more...


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Aster (Michaelmas daisy)

Asters are a large group of often autumn flowering perennials and annuals. The daisy-like flowers come in shades of blue, purple, pink and white. Many varieties are suitable as cut flowers. Asters will grow in any reasonable soil in full sun to li... more...



Campanula

Campanula (Bellflower)

Campanulas are a large group of perennials including many suitable for the rockery. All have bell shaped flowers in shades of blue and white. Campanulas grow in any well-drained soil in full sun. more...


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Centaurea cyanus

Centaurea cyanus (Knapweed, Perennial cornflower, Bluebottle)

Centaurea cyanus is a perennial with blue, pink, purple, red or white thistle-like flowers borne throughout summer. Grow centaureas in well-drained soil, even poor soil in full sun. more...



Delphinium

Delphinium

Delphiniums are border perennials renowned for their tall spikes of flowers in shades of blue and white. Delphiniums require a fertile soil in full sun. Most varieties will need staking of their flower stems. more...



Rosmarinus officinalis

Rosmarinus officinalis (Rosemary)

Rosmarinus is a group of evergreen shrubs often used as a kitchen herb for it's needle like, silver grey, scented foliage. It also bears light blue flowers from mid-spring to early summer. Rosmarinus prefers a site in full sun on well-drained soil. more...



Hibiscus syriacus 'Blue Bird' (Mallow, Tree hollyhock, )

Hibiscus syriacus 'Blue Bird' is a shrubs bearing large trumpet shaped flowers of deep violet-blue. Flowers are borne from mid-summer to late autumn. Hibiscus syriacus 'Blue Bird' requires a sheltered site in full sun on any good, well-drained soi... more...



Echinops

Echinops (Globe thistle)

Echinops are perennial plants with prickly, greyish foliage and rounded, metallic blue flowers heads. Some species may require staking. All types are attractive to butterflies. They require full sun and moderate to poor chalky or sandy soil. more...


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Eryngium

Eryngium (Sea holly)

The sea hollys are sun loving perennial plants with striking foliage. The flowers are teazle-like with spiky bracts, usually bluish in colour. Flowers are borne towards the end of summer. Leaves are either evergreen or deciduous depending on the v... more...


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Gentiana

Gentiana (Gentian)

Gentians are mostly alpine perennials with upward pointing bell-shaped flowers. The flowers are borne in either spring, summer or autumn depending on the species. Most varieties have blue flowers but there are a few with white blooms. Grow gentian... more...


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Geranium

Geranium (Crane's bill)

Note: this article is about the hardy perennial plant with the latin name Geranium and the common name crane's bill. Geranium is also the common name of a group of showy plants, grown as annuals, with the latin name [Pelargonium]. Geraniums are pe... more...


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