Bottlebrush, or Callistemon rigidus, does respond to the addition of iron products and to mulching heavily. However, a water-soaked root system can cause problems and winter damage. Bottlebrush is hardy in plant zones 8a -11 and grows to 4 to 5 feet by 4 to 5 feet. Eight to 10 hours of direct sunlight exposure daily is necessary, with little pruning needed. It is a slow-growing, non-native, evergreen with spikes, of bright orange and red flowers, in March and scattered throughout summer. All plants are damaged by severe cold but come back. For more information on this plant, visit university of Florida's website: Callistemon rigidus.
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Our bottlebrush tree (Callistemon rigidus) is more yellow than green and has dark spots on the leaves. Should we add iron or some other nutrient?
Last Updated: October 02, 2011
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