Aster macrophyllus ‘Twilight’ forms a groundcover of heart-shaped leaves and late summer clusters of lavender-blue flowers popular with bees and butterflies.

Aster subspicatus (Symphyotrichum subspicatum) has lovely lavender flowers with narrow petals around yellow centres.

Aster 'Bridal Veil' forms a unique cascading and trailing mound covered in thousands of tiny, ivory white flowers in late summer and fall.

Aster divaricatus 'Eastern Star' is a shade aster with jet black stems and clouds of tiny white flowers in fall.

Aster ericoides 'Snow Flurry' is a cold hardy heather aster with masses of late season nectar-rich white flowers.

Aster 'Lady in Black' forms tall stems clad in burgundy foliage that erupt with hundreds of small white and pink flowers in fall.

Aster novae-angliae 'Grape Crush' is a New England aster with purple flowers with orange eyes.

'Raydon's Favourite' forms lush mounds of fragrant foliage smothered with hundreds of gorgeous aster flowers in fall.

Aster pyrenaeus ‘Lutetia’ has soft lavender, narrow-petaled flowers opening from pink buds on purple stems.

Aster x frikartii 'Monch' is one of the best of all asters with a long season from summer to fall of bluish lavender flowers.

Aster Island 'Bahamas' offers deep hot pink flowers with bright yellow centres.

Aster Island 'Barbados' has late season light purple flowers and bright yellow centres.

Astilbe biternata is the only member of the genus native to North American with stately pyramidal spires of white flowers.

'Beauty of Ernst' Color Flash is an Astilbe with an ever-changing foliage display topped with pink flowers in summer.

Color Flash Lime is a unique Astilbe with gold foliage and pale pink flowers. A great update on a classic perennial.

'Chocolate Shogun' is an Astilbe with a difference: clumps of fern-like, chocolate-coloured foliage with upright, plumes of pale pink flowers.

Astrantia major 'Hadspen Blood' is a masterwort with rich, deep pinkish red flowers that last for months.

Astrantia major 'Ruby Cloud' has large clusters of tiny ruby-red flowers in a dome-shaped flowerhead with colourful bracts.

Astrantia major 'Ruby Wedding' is a fabulous boldly coloured masterwort with rich ruby red umbels.

Astrantia major 'Sparkling Stars Pink' forms clumps of palmate foliage topped with intriguing, bicolour pink and cream flowers.

Astrantia major 'Sparkling Stars Red' forms clumps of palmate foliage topped with intriguing red-maroon and white flowers.

Astrantia major 'Sparkling Stars White' offers palmate foliage topped with intriguing white flowers with hints of green.

Astrantia 'Star of Beauty' forms clumps of dark green foliage topped with branching stems of intriguing, deep pink flowers.

Astrantia 'Star of Billion' forms offers intriguing, white and green flowers with subtle pink highlights.