A rhizomatous perennial with upright, arching stems and large, lance-shaped leaves to 80cm. In late summer and autumn it produces a spike of fragrant yellow flowers
1-1.5 metres
0.5-1 metres
| Season | Stem | Flower | Foliage | Fruit |
|---|---|---|---|---|
| Spring | ||||
| Summer | ||||
| Autumn | ||||
| Winter |
Under glass, grow in peat-free, loam-based potting compost in bright indirect light. In the growing season water freely and apply a balanced liquid feed weekly. In winter keep just moist and remove old stems as they deteriorate. Outdoors grow in humus-rich, moist but well-drained soil in partial shade, with shelter from cold winds. Cut back stems when frost blackens the foliage and apply a deep, dry winter mulch
Propagate by division of rhizomes in spring; sow seed at 21-24°C as soon as ripe
No pruning required
Generally pest-free
Generally disease-free