Yellow Alder
Turnera ulmifolia
Aurea
About this plant
Turnera ulmifolia, commonly known as Yellow Alder, is a small shrub with bright yellow flowers and green, serrated leaves. It is valued for its long blooming period and ability to attract butterflies. This plant is often used in gardens for borders or as a low hedge and is appreciated for its drought tolerance and bright, cheerful flowers.
Taxonomy
- Genus
- Turnera
- Family
- Passifloraceae
- Higher classification
- Order Malpighiales
- Plant type
- Shrub
- Lifespan
- Perennial
Origin & Distribution
- Native region
- Caribbean, Central America, northern South America
- Distribution
- Native to the Caribbean and parts of Central and South America; widely cultivated in tropical and subtropical regions worldwide.
Care
- Light preference
- Full sun
- Suitable locations
- Outdoor, Balcony, Greenhouse
- Preferred window facing
- South-facing, West-facing, East-facing
- Watering frequency
- Moderate
- Watering interval
- 5–10 days
- Humidity
- Normal
- Minimum
- 10 °C
- Maximum
- 35 °C
- Optimal
- 18–30 °C
- USDA hardiness zones
- 9–11
- Soil pH
- 6.0–7.5 (slightly acidic to neutral)
- Soil type
- well-draining loam or sandy soil
Watering. Water regularly during the growing season but allow the soil to dry out between waterings. Reduce watering in winter when the plant's growth slows.
Fertilizing. Feed with a balanced, slow-release fertilizer in spring and mid-summer to encourage healthy growth and flowering. Avoid over-fertilizing, which can lead to excessive leaf growth with fewer flowers.
Turnera ulmifolia is a tough and easy-to-grow plant that thrives in sunny spots. It prefers well-draining soil and can tolerate dry conditions once established. Overwatering can cause root problems, so allow the soil to dry between waterings. It requires minimal maintenance and occasional pruning to keep its shape.
Propagation
- Propagation methods
- Cuttings, Seeds
- Care difficulty
- Easy
Ornamental features
- Flowering
- Yes
- Flowering period
- spring–fall
Bright yellow flowers with a dark center, green serrated leaves, and a bushy form make it attractive in gardens.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Non-toxic
- Weed potential
- Not considered a weed
Non-toxic to humans and pets; safe to grow around children and animals.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Skin contact, Pollen
- Pollen level
- Low
Turnera ulmifolia may cause mild skin irritation in sensitive individuals due to contact with its leaves or sap. It is not a common allergen, but people with sensitive skin should handle it with care. There is little risk from pollen allergies as its pollen is not highly airborne.
Common problems
Common problems include root rot from overwatering and leaf yellowing if grown in too much shade. Occasionally, it may attract pests like aphids or spider mites.
Uses
Used mainly as an ornamental plant in gardens and landscapes for its bright flowers and butterfly-attracting qualities.
Notes
Prune lightly after flowering to maintain shape and encourage bushier growth. Repot young plants annually if grown in containers. Protect from frost as it is sensitive to cold temperatures.