The bottlebrush (Callistemon) is an Australian evergreen flowering plant and a member of the myrtle family. Generally grown as a shrub, some varieties, especially the weeping form, can be grown as trees. The plant blooms in large, red flowers that resemble the brush one uses to clean a baby's bottle. It is a relatively carefree plant and thrives in the heat. Bottlebrush is hardy to USDA zones 8a to 11.
Remove old flowers and seed pods and any wood that appears damaged. Make the cut just behind the flowers or pods.
Slide underneath the weeping bottlebrush and remove bottom branches that are closest to the trunk. Make the cut just above a leaf node or seed pod. Do not cut interior branches if the bottlebrush is being grown as a shrub.
Rejuvinate an old or overgrown bottlebrush by removing the top one-third.
Water the bottlebrush well (allow the water to puddle at the base of the plant) after pruning.