Turnera ulmifolia, popularly called Yellow Alder, Sage Rose or West Indian Holly, is a compact, fast-growing evergreen shrub valued for its non-stop display of buttercup-yellow, five-petalled flowers. Each bloom lasts only a single morning, opening at sunrise and closing by midday, but the plant flowers profusely almost year-round in India's warm climate.
It forms a bushy mound of toothed, deep-green leaves and thrives in heat, drought and poor soils, making it an easy choice for borders, hedges and containers. Naturalised across much of tropical India, it self-seeds readily and is a reliable nectar source that attracts bees and butterflies.
Specifications
| Family |
Passifloraceae (formerly Turneraceae) |
| Native region |
Mexico, Central America and the Caribbean |
| Mature height |
0.6-1 m (occasionally up to 1.5 m) |
| Mature spread |
0.6-1 m |
| Growth rate |
Fast |
| Foliage |
Evergreen; lance to ovate, toothed, deep-green leaves |
| Flower colour |
Bright yellow, often with a darker centre |
| Flower season |
Nearly year-round in warm regions; peak in spring and monsoon |
| Climate zone |
Tropical and subtropical; warm frost-free regions of India |
Care guide
| Sunlight |
Full sun for best flowering; tolerates light afternoon shade |
| Watering |
Moderate; water when topsoil dries. Drought-tolerant once established; avoid waterlogging |
| Soil / mix |
Well-drained sandy to loamy soil; tolerates poor and slightly alkaline soils |
| Temperature |
Thrives at 20-35 C; frost-sensitive, protect below 10 C |
| Humidity |
Adapts to both humid and dry conditions |
| Fertilizer |
Light feeding; a balanced fertiliser once a month in the growing season is sufficient |
| Pruning |
Trim lightly after flushes to keep bushy and compact; remove leggy or spent stems |
| Repotting |
Repot container plants every 1-2 years in spring when rootbound |
| Propagation |
Easily grown from seed (self-seeds freely) or from softwood/semi-hardwood cuttings |
| Pests & problems |
Generally pest-free; watch for aphids and occasional caterpillars |
| Difficulty |
Easy |
Uses
<ul><li>Bright, low-maintenance flowering shrub for borders, beds and informal hedges</li><li>Container and balcony plant in warm Indian cities</li><li>Pollinator garden plant that attracts bees and butterflies</li><li>Ground cover and erosion control on dry, sunny banks</li></ul>
Growing tips
<p>Plant at the start of the monsoon or in spring for quick establishment. Choose the sunniest spot you have, as flowering drops sharply in shade.</p><p>During the hot, dry months water in the early morning and mulch to conserve moisture. Reduce watering in winter and shield young plants from cold north-Indian frost. Pinch growing tips on young plants and shear lightly after each flush to keep the bush dense and full of bloom.</p>