Cambridgeshire, United Kingdom

hello, i have three very large Salvia 'hot lips' shrubs that really need a good pruning, when is a good time to do this? I did it too early/or too short a couple of years ago & nearly lost them. i didn't get to prune them last year as i had a broken wrist & now they've gone mad, any ideas??

• 25 Jan, 2015