Phormium ‘RainbowSunrise’ commonly known as New Zealand Flax ‘Rainbow or Maori Sunrise‘ is an evergreen, clumping, half-hardy shrub. … This colourful shrub prefers a sunny, fairly sheltered location but will tolerate some partial shade.
Phormiums prefer a situation of full sun to bring out the best colouration although they will take a little shade, they like some moisture in the soil without it being waterlogged in winter. While they are hardy in many parts of the UK, especially closer to the sea. Phormiums in colder inland gardens are best given a warm sunny spot, or grown in a container with some shelter