Also known as Big-Leaf Aster · Big-Leaved Aster · Large-Leaf Aster
Bigleaf Aster (Eurybia macrophylla) is a North American native perennial with large basal leaves and clusters of lavender-blue to white daisy-like flowers in late summer
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun to Partial Shade
75% intensity
Thrives in full sun but tolerates partial shade, especially in hotter climates. Flower production may be reduced in deeper shade.
Consistent Moisture
50% intensity
Water when top 2-3 cm of soil is dry. Avoid waterlogged conditions.
Well-drained
50% intensity
Moderate to Cool
50% intensity
Prefers temperatures between 15-24°C. Tolerates cooler temperatures and requires a period of winter dormancy.
Low Feeding
25% intensity
Generally not needed. If required, use a balanced fertilizer in early spring.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
None
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Bigleaf Aster prefers consistent moisture but can tolerate some dryness once established. Water deeply when the top 2-3 cm of soil feels dry. Avoid waterlogging, as this can lead to root rot.
Reduce watering during winter dormancy to prevent over-saturation.
Cut back dead or damaged stems in late winter or early spring before new growth begins. Deadheading spent flowers can prevent self-seeding and encourage a tidier appearance.
Dividing the plant every 2-3 years also serves as a form of pruning.
Bigleaf Aster is easily propagated by division in early spring. Carefully dig up the plant and separate the root ball into sections, ensuring each section has at least a few stems and roots.
Replant divisions immediately and water thoroughly.
Repotting is typically only necessary for container-grown plants. Repot every 2-3 years in early spring before new growth emerges.
Use a well-draining potting mix and a pot that is only slightly larger than the current root ball to avoid overwatering.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Bigleaf Aster (Eurybia macrophylla)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Eurybia |
| Species | Eurybia macrophylla |
Similar in genus Eurybia
Answers based on plant encyclopedia data
