Lilly pillies produce small white flowers in summer and autumn, which smell delicious. The newer varieties don't flower and fruit as often, if at all, but their versatility and hardiness makes them great for any garden. Quick growing, evergreen trees. But they can grow up to 30 metres high, which is not always appropriate for an average backyard Lilly pillies are really tough. They are quite drought tolerant in the ground, and grow in either full sun or semi shade. But in a pot keep them looking lush by watering regularly.