Also known as Coast Range Mule-Ears
Smooth mule-ears (Wyethia glabra) is a striking wildflower featuring large, bright yellow daisy-like flowers atop sturdy stems, reaching up to 1 meter.
At-a-glance light, water, soil, and growing conditions from plant data
Full sun
100% intensity
Prefers at least 6-8 hours of direct sunlight per day for optimal growth and flowering.
Established plants are drought-tolerant
25% intensity
Water deeply when dry, allow soil to dry out between waterings.
Well-drained, Sandy, Loam
50% intensity
Tolerant of heat and cold
50% intensity
Adaptable to various temperature ranges typical of its native habitats, including hot summers and cold winters.
Low needs
25% intensity
Fertilize sparingly in spring if needed; avoid over-fertilization which can lead to weak growth.
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
Water regularly during the first growing season to establish a deep root system. Once established, smooth mule-ears are drought-tolerant and require infrequent watering, especially in drier climates.
Allow the soil to dry out completely between waterings to prevent root rot.
Prune back spent flower stalks after blooming to maintain a tidy appearance and potentially encourage a second flush of flowers. Remove any dead or damaged foliage in late fall or early spring before new growth emerges.
Minimal pruning is typically needed for this robust perennial.
Smooth mule-ears can be propagated by seed or division. Seeds can be sown in fall or early spring, often requiring a period of cold stratification.
Division of established clumps is best done in early spring before new growth begins. Ensure divisions have adequate moisture.
Repotting is generally not necessary for established plants in their natural habitat. If growing in containers, repot every 2-3 years in early spring into a slightly larger pot with well-draining soil.
Ensure good air circulation around the roots to prevent fungal issues.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Smooth Mule-Ears (Wyethia glabra)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Wyethia |
| Species | Wyethia glabra |
Similar in genus Wyethia
Answers based on plant encyclopedia data
