Every garden should have this long flowering beauty which flaunts its sprays of fragrant purple flowers, on wiry angular branching stems, from June until the frost. Acts as a magnet for butterflies. ... Learn More

These dwarf, spreading, early blooming plants, produce vividly coloured flowers in a mix carefully formulated to maintain a range of bright colours in optimum balance. The flowers which appear endlessly all summer long, are absolutely invaluable for massing in beds, edges of borders, window boxes and baskets. ... Learn More

This is the pure white form of this lovely perennial which is usually blue, with multi-branching candelabra-heads. These plants can carry on flowering right into late autumn, especially if they are dead-headed when a second flush will appear. ... Learn More

This lovely, bone hardy, long flowering plant from Nova Scotia has many-branching candelabra type flower-heads, each spike of flowers slowly expanding as it ascends the stems, just like sparklers burning but in reverse. This is a valuable addition in that rarely seen true-blue colour. You may discover the occasional pink-coloured variant amongst the seedlings and these should be removed on flowering. ... Learn More

This intriguing, rather tall plant has strong, square-sectioned, dividing stems bearing heads of many pinkish-blue flowers, and thick rough leaves and is ideal for a hot spot or very back of border where the flowers can do of their best. Although it comes from the beaches and hills of Hawaii, and is native to the Americas from Mexico south through Central and South America to Argentina and Chile, it seems to be perfectly hardy in the cold UK! ... Learn More

The "Mountain Blue Vervain" comes from the southern states of the USA where it grows at altitude amongst rocks and gravel. The flowers, which grow on the ends of thick, rough-leaved stems, bear a striking resemblance to lavender, slowly opening down the long poker of buds, rather like a burning firework. ... Learn More

New verbenas appear very rarely but this brand new plant has been discovered in the Argentinian Andes. Swarms of widely-spread, gypsophila-like white flowers on strong, branching rough stems are profusely produced all summer long. ... Learn More

Deep blue spires of flowers sit upon serrated lime green leaves. A classic cottage garden plant. Perennial. ... Learn More

A splendid plant for the back of the border, it produces winged stems clad with long narrow leaves and bears from August to late autumn numerous long-stalked sprays of many green-centred, yellow flowers, each two inches or so across. Your bees will absolutely love this flower as it is one of the best bee plants of the eastern United States, where it has been christened, you will never guess, "Wingstem"! ... Learn More

Dividing stems carry numerous bright golden daisies with sharply pointed petals in early and midsummer on this lovely and very unusual mid-border flower. ... Learn More

This new plant carries flat heads of deepest purple daisies flowering on strong stems in September and October. Valuable late colour when almost everything else in the garden has died away. Associates well with late cimicifugas and aconitums. ... Learn More

Hardly resembling a gentian, but extremely lovely nonetheless, is this compact plant bearing many spires holding largish pale blue flowers. The glossy green basal foliage is an added bonus! ... Learn More

Appropriately named, this rare plant is from Japan. With slowly lengthening royal blue spires, up to 30cm long, and 60-90cm stems lightly clad with pointed sawtooth leaves, it flowers until late September. ... Learn More

Striking blue-violet flowers on long branching stems emerge from bushy clumps of vivid green foliage. Growing well in full sun and freely draining soil, it is perfect for cutting, and the bees and butterflies will love this plant as much as you. It makes a great summer display that will benefit from staking to ensure the beautiful blooms remain upright and on display, and is easily propagated by division at either end of the season. ... Learn More

This dwarf mutant forms dense mats of very deeply divided, almost fern-like leaves, and short dumpy spikes of light blue flowers. It is perfect for growing in a trough or small alpine garden rather than a large rockery. ... Learn More