Vitex chaste trees are beautiful and virtually carefree ... It grows best in warm climates; in cooler regions (Zone 5 and 6) it is often grown as a perennial and cut back to the ground in winter.

Don't worry about insects and diseases; other than leaf spot, diseases and insects pests aren't tempted by chaste trees. These shrubs aren't quite as cold-hardy as lilacs and thrive best in zones ...