Olive tree topiaries can have crowns that grow naturally or else cut into balls. Shaping an olive tree crown into a ball means that you lose all flowers and fruit. This type of topiary will require regular maintenance to prevent ragged edges

To prune an olive tree, choose a time either in late spring or early summer and make sure your tree is at least 3-4 feet tall before pruning. Choose 3-4 strong lateral branches to form your main shape and make slanted cuts to remove branches.