Does Trimming a Hedge Make It Grow Thicker?
Cutting a hedge properly can encourage thicker growth. The best thing to encourage thicker growth is to ensure the hedge is wider at the bottom, as this allows the best regrowth. You should also use fertilizer at the recommended time of year to help with regrowth.
Another thing you can do is prune the branches and remove excess wood in your hedge. This allows the hedge to grow in various directions, which allows for a thicker appearance.