False aster
Boltonia diffusa
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
60 inches
Width
36 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Moderate
Humidity
Average
Lifespan
Perennial
Native To
North America
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
Boltonia diffusa, commonly known as false aster, is a perennial herbaceous plant with airy clusters of daisy-like white flowers and finely divided, fern-like foliage that creates a soft, bushy appearance. This species is valued for its long-lasting summer to fall blooms and its ability to attract pollinators, thriving well in well-drained soils with full sun exposure.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into well-draining soil in early spring.
- Water thoroughly after planting to establish roots.
- Allow soil to dry between watering sessions.
- Divide clumps every 3-4 years in early spring.
- Mulch around plants to retain moisture and suppress weeds.
- Prune back after flowering to promote bushiness.
Pro Tip
Plant in full sun with well-draining soil for best blooms.
Keep It Thriving
Care Guide
Do
- Water regularly during dry periods 🌱
- Prune after flowering to maintain shape
- Divide every few years to rejuvenate
Don't
- Overwater, especially in winter ❌
- Allow soil to become waterlogged
- Neglect pruning can lead to legginess
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Fertilize | ||||||||||||
| Pinch | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
False aster questions
What zones can False aster grow in?
False aster is hardy in USDA Zones 4–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is False aster deer resistant?
Yes — False aster is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does False aster bloom?
False 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 False aster need full sun?
False aster does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
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Grow False aster with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
