A good way to manage red twig dogwoods is to
remove the oldest, thickest, least colorful stems at
ground level every year.
This will force new shoots to grow from the roots.
The new growth will have the red color you desire.
Pruning them this way, rather than shearing them
back from the ends of the branches, will reduce the
overall size of the plants significantly while
maintaining the shrub’s natural growth habit.
Another option is to prune all of the stems within a
few inches of the ground every two or three years.
This will keep them in bounds and ensure good red
stems color through the winter.
Late February or early March
is the best time to prune them.
When to prune
How to trim Hollies