perennial

Japanese Aster

Aster pekinensis

The Story

Plant Bio

Aster pekinensis is a herbaceous perennial with a bushy growth habit, featuring narrow, lance-shaped green leaves and clusters of daisy-like flowers with purple or blue petals and yellow centers.

This species is valued for its late summer to autumn flowering display and its ability to attract pollinators such as bees and butterflies.

Uses & Benefits:

Bright purple flowers add vibrant color, attracting pollinators and enhancing garden aesthetics.

Hardy perennial requires minimal maintenance and improves soil stability.

Supports bees, butterflies, and other beneficial insects, promoting biodiversity.

Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

18 inches

Light

Full Sun

Zones

5, 6, 7, 8, 9

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

East Asia

Toxicity

Non-toxic to humans and pets

Bloom period

Late summer – Late fall

In flower about 4 months of the year

Planting

How to Grow

Tuck seeds into well-draining soil in early spring
Water regularly to keep soil moist but not soggy
Place in full sun for optimal blooming
Thin seedlings for proper spacing after germination
Fertilize with a balanced fertilizer during active growth
Deadhead spent flowers to encourage more blooms

Pro Tip

Ensure good drainage to prevent root rot and promote healthy growth

Keep It Thriving

Care Guide

Do

Water consistently during dry spells 🌱
Deadhead to prolong blooming
Apply compost annually for nutrients
Mulch around roots to retain moisture

Don't

Avoid overwatering to prevent fungal issues ❌
Don’t neglect pruning after flowering
Refrain from using heavy clay soil without amendments
Avoid excessive fertilization which can cause leggy growth

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Mulch
Pest Check
Prune
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vivid border plantPollinator-friendly gardenColorful herbaceous perennial

Companion Plants

Sedum EchinaceaBlack-eyed Susan Coreopsis Salvia

Multiply

Propagation Methods

Good to Know

Common Questions

Japanese Aster questions

What zones can Japanese Aster grow in?

Japanese Aster is hardy in USDA Zones 5–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Japanese Aster deer resistant?

Not reliably. Deer may browse Japanese Aster, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Japanese Aster bloom?

Japanese Aster typically blooms in late summer through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Japanese Aster need full sun?

Japanese Aster does best in full sun (6+ hours).