Tall perennial with branching stems containing umbels of pale pink flowers in early summer. Photo provided by: Rijnbeek...

A clump-forming perennial with basal leaves and pretty velvety soft violet petaled, yellow-centred, daisy flowerheads. Photo provided by: Howard Nurseries Ltd ...

A clump-forming perennial with handsome, sword-shaped, arching leaves & sturdy upright stems topped with an abundance of lily buds that open in succession to reveal rich golden orange flowers. Photo provided by: Howard Nurseries Ltd ...

A clump-forming perennial with handsome, sword-shaped, arching leaves & lavender blue flowers with a green throat. Photo provided by: De Ree Holland B.V....

This produces a wonderful array of white flowers which have a lovely pink tint, especially when in bud. This will make a full display in late summer and autumn on lush green foliage. Photo provided by: Kernock Park Plants ...