9 cm pot Perennial starter.  Gaura lindheimeri Sparkle White copes well in a sunny dry position, once established it is drought tolerant.  The white flowers emerge from blush-pink buds and are spaced along arching stems reaching 60-80cm, it is lovely to watch the butterfly-like flowers dancing in the breeze.  The leaves are lance shaped and dark green.  Cut back in midsummer to encourage new growth and flowers.  Popular with bees and beneficial insects.