China Asters in Barnfield
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
Sow Seeds Indoors
1 Mar – 25 MarSow seeds in trays or modules around 1st March - 25th March 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
27 Mar – 10 AprWhen seedlings are large enough to handle, prick them out from 27th March into small pots. Handle them by the leaves and keep them growing on in bright light so they do not go leggy.
Harden Off
1 Apr – 15 AprStart hardening off from 1st April 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
29 Apr – 13 MayPlant out from 29th April 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
5 Jun – 7 OctStart deadheading from 5th June and keep going until 7th October. 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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Calabrese
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