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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

when there are too many competing for the same resources may be necessary, but apart from that, all we need to do is wait and see.Perennial lady's mantle has furry, round leaves and produces lime-green flowers. It grows to around 45cm high

staking than other varieties, which tend to have dense, heavy heads of petals.Cactus dahlias are perfect for providing extra colour to herbaceous borders, as they have such a long flowering season. They also come in a rangeof heights, so can be planted

in late-summer are pretty wide-ranging, as are shrubs, climbers and herbaceous perennials. Most fashionable annuals, exotics and tender perennial patio plants should also stay in flower until late-September, or even early October, if properly looked after