Viburnum and Photinia Pruning

Question

I have two viburnums which have grown to about seven feet tall, which is too big for the plot. They are healthy specimens and show full green colour all over, although production of their white flowers has been limited. What is the best way to prune this down to a suitable size and when is this best done please?

Also, I have two Red Robin Photinia which have grown to 12 feet tall. Again, they are very healthy plants and show the characteristic red foliage which turns to green. What is the best way to prune this down to a suitable size and when is this best done, please?

Thanks in advance

Answer 1

You can normally prune overgrown shrubs by about a third of their growth, but no more in one given year as this could cause problems. If necessary, you can take another third off the following year until you get them at a more manageable height/shape for your needs. Here is more information that should help: https://www.gardeningknowhow.com/ornamental/shrubs/viburnum/viburnum-pruning.htm
https://www.gardeningknowhow.com/ornamental/shrubs/photinia/pruning-photinia-shrubs.htm