Eranthemum (Eranthemum pulchellum), commonly called Blue Sage, is an attractive evergreen shrub grown for its showy spikes of vivid blue flowers set against deeply veined, dark-green leaves. Blooming mainly in the cooler winter months, it brings rare true-blue colour to shaded borders and understorey plantings. Compact and bushy, it suits mass plantings, woodland gardens and container displays in partial shade. Native to tropical Asia, it appreciates warmth, humidity and protection from harsh afternoon sun. Easy to grow and quick to recover after trimming, Eranthemum is a reliable choice for adding cool colour to shady Indian gardens.
Specifications
| Family |
Acanthaceae |
| Native region |
Tropical Asia (India) |
| Mature height |
0.6-1.5 m |
| Mature spread |
0.6-1 m |
| Growth rate |
Moderate to fast |
| Foliage |
Evergreen, deeply veined dark-green leaves |
| Flower colour |
Bright blue |
| Flower season |
Winter |
| Climate zone |
Tropical and subtropical |
Care guide
| Sunlight |
Partial shade to filtered light |
| Watering |
Regular; keep soil evenly moist |
| Soil / mix |
Fertile, well-drained, humus-rich soil |
| Temperature |
18-32°C; protect from frost |
| Humidity |
Moderate to high |
| Fertilizer |
Balanced NPK monthly in growing season |
| Pruning |
Prune after flowering to keep bushy |
| Repotting |
Repot containers every 1-2 years |
| Propagation |
Softwood stem cuttings |
| Pests & problems |
Mealybugs, aphids and spider mites |
| Toxicity / safety |
Generally non-toxic |
| Difficulty |
Easy |
Uses
<p>Ideal for shaded borders, mass plantings, understorey beds and containers where rare blue winter colour is desired. Also used in butterfly and woodland gardens.</p>
Growing tips
<p>In Indian gardens plant in dappled shade and keep soil moist; protect from harsh afternoon sun and prune after the winter bloom to maintain a compact, floriferous shrub.</p>