It’s best to prune rosemary in mid to late spring. If you prune it now you could run the risk of any new growth dying back with early frosts. Rosemary is like lavender in that it does not re-grow well from old wood. It’s best to only give the shrub a light trim and remove any shoots you feel have become out of control.
Copyright © Thompson & Morgan, 2004-2016. All rights reserved.