The colder months of the year are the best time to sit and sketch in a warm glasshouse. Walking through the 12m high glasshouses at RHS Garden Wisley, I came across an amazing Aloe (Aloe arborescens) in full flower. The grey-green rosettes tumbled over the rocky floor, with their flame orange flowers rising above the foliage. No wonder it’s called The Torch Aloe. I had to make this plant the subject of a print!