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foliage. Height/spread 1.2m x 90cm.Corsican hellebore, Helleborus argutifoliusDespite its name, it's not that likely to flower for Christmas - more usually seen flowering from late-winter. Flowers are white, though sometimes flushed pink, and flat

.The flower stems are strong and tall, up to 1.2m (4ft), and each supports a single magnificent bloom, blood red and boldly imprinted at the base of each petal with a jet-black splodge. The stamens, arranged in a broad circle around the dark, central knob

, gritty compost. They take up to three months to germinate at about 15°C and should be left for a few years before transplanting and growing on.PropagationMore plants to grow for late-summer colourChoose flowers for late-summer colourCombine asters, sedums

of gritty, well-drained compost and keep in a cold greenhouse. Height 10cm.Tecophilaea cyanocrocusAs a species, Ipheion uniflorum can look a bit wishy-washy, but 'Wisley Blue' is very pretty. Its flowers are like big, upward-facing blue stars. Plant it among

, with yellowy pink blooms. Height 110cm.Dahlia 'Preference'Large-flowered cactus type, needs staking to support stems. Height 120cm.Dahlia 'Reputation'Giant-flowered semi-cactus dahlia. Grow in rich soil for best results. Height 140cm.Dahlia 'Rev P Holien'Medium-flowered

flowering times:10 best varietiesIf planted in a sheltered, south-facing spot, 'Rijnveld's Early Sensation' will be in flower by Christmas. While most daffodils in bloom at this time of year are usually small, this variety has large, windmill-style flowers

all summer long. Support them, feed and water them regularly, remove spent flowers and watch out for signs of pests and diseases. Our five tips, below, will ensure your roses put on a show-stopping display.Deadhead roses regularly, otherwise plants

Climbing flamesAs summer progresses, late-flowering clematis come into their own, and for me they're as much a part of summer as long, balmy evenings and cricket.There are few plants that give me as much pleasure or colour for so little work as late-flowering

Shade can be a nightmare if your heart is set on growing summer bedding, fruit and veg, or Mediterranean plants, which need direct sun to flourish. But there are plenty of beautiful plants which thrive in shady conditions.Many people imagine

and naturalise in borders, so any plants lost to frost should be replaced by their offspring.More features and advice on growing herbaceous perennialsLearn how to take verbena cuttingsGrow plants to attract beesChoose flowers for late-summer colour