Evergreen azaleas thrive in the same moist, acidic conditions as camellias, for which they are ideally suited as companion plants, flowering somewhat later than most Camellias from April to early June. Flower colours range from white through pinks and purples to deep reds and orange-reds, with both single and double flowers. There is often a deeper coloured marking (a 'blotch') in the throat of the flower. The dappled semi-shade of a woodland provides ideal growing conditions as strong sunlight can bleach the blooms. Evergreen azaleas will retain most of their leaves over winter in the UK climate, but they usually turn varying shades of red, orange or yellow with the onset of cold weather.