Gardening: Summer is the season for colour

Helenium 'Moerheim Beauty',Hannah Stephenson/PA Photos.
Helenium 'Moerheim Beauty',Hannah Stephenson/PA Photos.
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Tips to plant late-summer blooms to keep your garden looking hot - plus, find out what else needs doing in the garden this week.

Coming back recently from a break in the beautiful region of Tuscany, Italy where fields of bright sunflowers contrast with green rolling hills, vineyards and postcard-perfect farmhouses, I felt pretty depressed - until I looked into my garden, and saw a riot of colour in my late-summer border.

If you plant carefully, you too could return from holiday to find exciting hues of vibrant reds, burnt oranges and sizzling yellows intermingled with wafting ornamental grasses, front-of-border sedums and palm-sized lily blooms in the perennial border.

In my own garden, repeat plantings of clumps of bright red Crocosmia ‘Lucifer’, whose sword-like leaves and spikes of flowers provide both colour and architectural value, stand alongside burnt orange Helenium ‘Moerheim Beauty’, providing a dazzling clash of colours, the daisy-like flowers of the heleniums sometimes lasting into autumn.

Other great late-summer perennials include rudbeckias, also known as coneflowers because their showy, yellow petals hang down, making the dark central cone prominent.

The daisy-like flowers are attractive to bees and the plants, whose heights range from 60cm (2ft) to 180cm (6ft) depending on variety, suit most border situations, although taller varieties may need staking.

They thrive in full sun and a reasonably fertile, moist soil, and good companions include red hot pokers. Some rudbeckias look fantastic as container plants, adding interest around purple cordylines, and again the flowers can last into October.

I am also a great fan of sedums in the flower border, extending seasonal interest well into the autumn.

They are fairly low-growing so do well at the front of the border and are long lasting, their pale green, succulent foliage appearing in spring and early summer followed by flowers in late summer 
in shades of pink, red and yellow.

Sedums are also known as ice plants because if you
touch them on a warm day the leaves feel cool. S. spectabile and S. telephium varieties
 are popular with bees and butterflies, especially on warm days, while hoverflies prefer the dark, mat-like S. spurium.

Most sedums do well in well-drained soil, are drought tolerant and also suitable for containers. Among the longest flowering is ‘Autumn Joy’, whose flowers turn from salmon pink to coppery red from August to November. Combine them with asters or ornamental grasses.

Add a touch of elegance to your border with kaffir lilies, which again will look fine at the front of a border but need a sheltered, sunny spot.

They are hardy in most areas, but in colder regions make sure you cover them with a thick winter mulch or grow them in a pot under glass. Pink-flowered varieties complement silver foliage plants well.

I have a deep purple buddleia which has just come into flower at the back of the border and whose blooms again contrast well with the oranges and red hues of late summer.

If you give this colourful shrub a good prune in spring it will come back stronger than ever year after year - mine grows to more than 3m (10ft) in a season, producing rich deep purple blooms through to autumn.

Of course, no late summer garden would be complete without at least a smattering of dahlias, which were once perceived as vulgar but have now become more accepted among many gardeners who plant striking deep coloured varieties such as the dark red D. ‘Kenora Macop-B’ alongside ornamental grasses such as Stipa gigantea.

I haven’t even mentioned the many huge lilies which are now in full flower in the garden, or the feathery astilbes which will brighten up a moist, lightly shaded spot in late summer, or the vivid blue agapanthus ‘Headbourne Hybrids’ which look fabulous in pots throughout August and September.

For me, late summer can provide a wealth of sizzling colour which can at times overshadow some of those flowers which flourished in our so-called ‘flaming’ June.