These articles are written to apply to the northeastern corner of Illinois. Problems and timing may not apply outside of this area. They may provide a background or screen, may be an interesting focal point, provide cover for birds, and may produce attractive flowers and fruit. Mention large shrubs with flowers and many people think of lilacs. Fragrant purple, pink, or white flowers make this shrub a longtime favorite.
Many cultivars are available though area nurseries.
Keep in mind that it's best to prune lilacs on a regular basis to avoid older, woody trunks that attract insect borers and also decline in flowering. Dogwoods are another group of popular larger shrubs. Its twigs are red, and need to be pruned on a regular basis to maintain attractive color. Yellow flowers in early spring are popular, but may be damaged in severe winters. Discussions of large shrubs needs to include the viburnums.