China Aster
Callistephus chinensis
A half-hardy annual grown for long-lasting late summer colour. Sow under cover in the UK, harden off carefully, then plant out once frost risk has passed in a sheltered, sunny spot with free-draining soil.
Growing Guide
Step-by-step instructions for growing China Aster
Planting Calendar
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Sow Seeds Indoors
Sow seeds in trays or modules around in a light seed compost. Cover with a shallow layer of compost and keep at until they germinate. Keep the compost just moist, not wet.
Prick Out Seedlings
When seedlings are large enough to handle, prick them out from into small pots. Handle them by the leaves and keep them growing on in bright light so they do not go leggy.
Harden Off
Start hardening off from and give them around 10 days to adjust. Put plants outside during the day at first, then leave them out for longer so they settle before planting.
Transplant Outdoors
Plant out from into fertile, well-drained soil once all frost risk has passed. Space plants apart, water in thoroughly straight after planting, and keep them sheltered from strong wind.
Deadheading & Maintenance
Start deadheading from and keep going until . Remove fading flowers regularly so the plant does not set seed, which keeps it producing more blooms right through to the autumn frosts. Keep the soil evenly moist in dry spells and pinch out any weak or floppy growth.
Companion Plants
Tap a plant to see why it works (or doesn't) with China Aster.
Good companions
Plants to avoid
Why companion planting matters
Companion planting can deter pests, improve pollination, and make better use of space. Some plants confuse pests or attract beneficial insects; others improve soil or offer shade to neighbours that need it.
Suggested Varieties
Popular varieties of China Aster to consider
Matsumoto
A reliable group with large, single flowers on strong stems, good for cutting and borders.
Milady
Compact plants with double flowers, useful in pots and at the front of a border.
Princess
Tall, cutting-type plants with full flowers and good stem length.
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