I am interested to know how hardy Kniphofia really are. I can grow most Cape and Drakensberg species here in the south of England with little problem, but considering our lowest temperature this winter has been -3°C (admittedly exceptional, we normally get down to -10°C) it is hardly a good test. It would be great to hear which species people have found the hardiest and how low did it go? Has anyone tried any of the tropical species - I saw K. thomsonii growing outside in Shropshire and the person said that it had got down to -15°C - considering I had killed it in my own garden I thought this was remarkable? Are there any species that should have been hardier - I continually struggle keeping K. hirsuta alive but I am on heavy clay soil? Chris Christopher Whitehouse Keeper of the Herbarium RHS Garden Wisley Woking GU23 6QB UK