Quick Guide: summer, hardy, semi-shade, height: 15-23cm/6-9in, width: 15-23cm/6-9in

Asperula orientalis is a neat, low-growing plant with attractive star-shaped leaves and clusters of tiny blue flowers that are lightly scented. Good at the front of the border or for cutting, this species may also be grown as a pot plant. No named varieties are available.

PROPAGATION Sow seed outdoors in late spring directly in the flowering site. Thin seedlings in two stages to a final spacing of 10-15cm/4-6in. For pot plants, sow under glass in early autumn, placing 5 seeds to a 12.5cm/5in pot of compost, and over-winter in gentle heat.

GROWING Asperulas do best in moist soil. When the plants are 10cm/4in high, stake them with twiggy branches for support. Discard plants after flowering.

POSSIBLE PROBLEMS Generally trouble-free.