More compact cultivars will grow around 1.2-1.5m (4-5ft) tall. The height will be influnced by the growing conditions. Plants grown in moister, fertile soil are likely to grow taller.
Taller taller selection will grow typically around 1.5-2.1m (5-7ft) depending on the cultivar and growing conditions. Some such as Phormium tenax can grow well over 2.4m (8th) tall.
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