Hydrangea macrophylla 'Paris Rapa' is great for small spaces because it has upright stems and a compact habit. The long-lasting fuchsia-pink flowers fade to green. It grows 3 feet tall and 4 feet wide. Zones 5-9
The best time to prune lilac is late spring -- immediately after they finish blooming. If you prune them later in the growing season or during winter, you'll remove flower buds and decrease the amount of spring bloom.