Asperula annual woodruff
Height 30cm (1ft)
Planting distance 7.5-10cm (3-4in)
Flowers in mid summer
Annual woodruff (Asperula orientalis) is the only hardy annual in this genus of 200 species – all other woodruffs are perennials. Its strongly scented pale blueappear in mid summer on top of 30cm (1ft) tall stems clothed with narrow green lance-shaped leaves. These are arranged in attractive whorls up the stems. It is useful for garden decoration as, unlike most annuals, it tolerates partial shade and likes moist soil. With its compact habit, it is also suitable for rock gardens. The flowers are also good for cutting.
Scatter seeds over the flowering site in, and rake them gently into the soil. When the seedlings are strong enough to handle, thin them to 7.5-10cm (3-4in) apart.
Pests and diseases