Growth and Management
Annual height growth of sprouts from cut stems varies from 1 to 3 m/year. Up to 60 sprouts are produced per stem. Maximum height at 20 years is about 9 m. At higher elevations, shrubs reach 4 to 5 m in 15 years, after which growth slows until a maximum height of 10 m is reached. Fruits should be collected by hand or with pruning poles as soon as they turn from green to yellow. The capsules are air-dried until opening. Generally, the seeds should be sown as soon as possible because they remain viable for only a few days. Seed can be stored in sealed containers under refrigeration for four to six weeks, but germination begins to drop rapidly after 10 days. Seeds are broadcast on well-prepared beds that are kept continually moist until germination and seedling emergence. Light is required for successful germination. Recommended spacing using rooted cuttings for erosion control is 1.8 m by 1.8 m; for unrooted whips or shorter cuttings, 0.6 m. Rooted cuttings can be grown to 3 m tall in containers. Cuttings should be 45 to 60 cm long, and whips (not recommended) should be 1.2 m long.
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