How to grow asters

How to grow asters

Find out all you need to know about growing asters, or Michaelmas daisies, in this detailed Grow Guide.

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sow
Sow

Do not Sow in January

Do not Sow in February

Do Sow in March

Do Sow in April

Do not Sow in May

Do not Sow in June

Do not Sow in July

Do not Sow in August

Do not Sow in September

Do not Sow in October

Do not Sow in November

Do not Sow in December

Plant
Plant

Do not Plant in January

Do not Plant in February

Do Plant in March

Do Plant in April

Do Plant in May

Do not Plant in June

Do not Plant in July

Do not Plant in August

Do not Plant in September

Do not Plant in October

Do not Plant in November

Do not Plant in December

Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does not flower in May

Plant does not flower in June

Plant does flower in July

Plant does flower in August

Plant does flower in September

Plant does flower in October

Plant does not flower in November

Plant does not flower in December

Take cuttings
Take cuttings

Do not Take cuttings in January

Do not Take cuttings in February

Do not Take cuttings in March

Do Take cuttings in April

Do Take cuttings in May

Do Take cuttings in June

Do not Take cuttings in July

Do not Take cuttings in August

Do not Take cuttings in September

Do not Take cuttings in October

Do not Take cuttings in November

Do not Take cuttings in December

Asters are in the daisy family and flower mostly in late summer and autumn, which gives them their common name Michaelmas daisy. Asters are ideal for growing in mixed borders, with grasses and other prairie-type perennials.

Advertisement

Asters are a great transition plant, bridging the seasons from summer to autumn. The bright, daisy-like flowers make a colourful splash and provide a rich source of nectar and pollen for late-flying insects, and many varieties make good cut flowers.

In botanical terms there are two main types of Asters, north American and European. Most North American species come under the name of Symphyotrichum or Eurybia, but many people still refer to them as asters.

Asters are a great transition plant bridging the seasons from summer to autumn.

Where to plant asters

How to grow asters - where to plant them
How to grow asters – where to plant them

Plant asters in dappled or partial shade, in any type of soil. Asters can also be grown successfully in containers.


How to plant asters

Asters are easy to plant. Plant them as you would any perennial. Watch our video guide with Monty Don on how to plant asters:


How to propagate asters

How to grow asters - aster cuttings in a pot
How to grow asters – aster cuttings in a pot

You can increase your stock of asters by taking cuttings between April and August. After planting out in spring, they will flower the following year.


Growing asters: problem solving

Mildew is a common problem among many aster varieties. Keep plants well-watered, and don’t let the soil dry out, but also look for varieties that are more mildew-resistant.


How to care for asters

How to grow asters - cutting back dead aster foliage
How to grow asters – cutting back dead aster foliage

Deadhead plants to keep them looking good and to encourage more flowers. Cut aster plants back hard after flowering in late Autumn. In midsummer, pinch out the top shoots to encourage flowers.

Advertisement

Great aster varieties to grow