How to grow China Aster

Callistephus chinensis

Seed self-sows freely, to prevent dead head immediately after flowers are spent.

Growing China aster from seed

Sow seed indoors before last frost. Can also be direct sown after last frost.


Barely cover seed.


Seeds are very prone to dampening off, so be sure to keep air circulation high and keep soil on the dry side, watering from below.

Ensure a seed sowing distance of 8.58 inches (22.0 cm). Soil temperature should be kept higher than 21°C / 70°F to ensure good germination.

By our calculations*, you should look at sowing China aster about 42 days before your last frost date .

Transplanting China aster

Plant out 30 to 35cm apart in early summer after soil has warmed

Ensure that temperatures are mild and all chance of frost has passed before planting out, as China aster is a tender plant.

By our calculations*, you should look at planting out China aster about 7 days after your last frost date.

How long does China aster take to grow?

These estimates for how long China aster takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.

Days to Germination How long does it take China aster to germinate?
5 days

Average 5 days | Min 3 days | Max 8 days (12)

Days to Transplant How long until I can plant out China aster?
+ 26 days

Average 26 days | Min 24 days | Max 30 days (3)

Days to Maturity How long until China aster is ready for harvest / bloom?
+ 127 days

Average 127 days | Min 127 days | Max 127 days (1)

Total Growing Days How long does it take to grow China aster?
= 158 days

When should I plant China aster?

Our when to plant China aster estimates are relative to your last frost date.

When to sow The number of days to sow China aster before or after your last frost date.
42 days before Last Frost Date
When to plant out The number of days to plant out China aster before or after your last frost date.
7 days after Last Frost Date

Other names for China aster

Aster

Aster chinensis, Aster sinensis

Footnotes


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