'Franziska Maria' produces striking, double, blue flowers that look almost unreal. These are produced over a long period of time to provide colour throughout the year. It is a good plant for growing against fences and walls and is ideal for small gardens. It also associates well with other plants and looks particularly good trained through wall shrubs or variegated shrubs.
Best planted in moist well drained soil in a sunny position. Hardy (H4)
At a glance:
Moist well drained soil
Prune group 2
Will reach a height of 2.5m