Double Diamond is a deciduous agapanthus. The flowers are beautiful white flowers, and the petals look frilly. These appear in early summer. Perfect if you're looking to add some colour in patio pots or at the front of a border.
At a glance:
White flowers in early summer
Well drained fertile soil
Will reach a height of 0.5m and a spread of 0.5m over 2-5 years