Low maintenance, Erigeron Karvanskianus ground cover are pretty drought resistant but are happiest with a regular supply of water during dry summers.  For best results plant them in full sun in fertile well-drained soil (they will tolerate semi-shade but may produce less flowers). They will die back down to ground level in winter when you can trim off any straggly dead foliage ready for the following Spring.  They are also tolerant of coastal conditions.

How to grow Erigeron Karvanskianus

Position: Full Sun/partial shade

Foliage: Perennial, leaves appear from Spring with flowers following in early Summer through to mid-late Autumn

Soil and site: Fertile, well drained

Flowering time: Early Spring to late Autumn

Growth rate: Moderate

Ultimate height and spread: 25cm with an average spread up to 40cm

Hardiness: Hardy

Aftercare: Water well until established, avoiding soil becoming waterlogged. Trim off any dead/straggly areas after flowering has finished