Cutting Back Leggy, Woody French Lavenders
I've got a whole string of french lavenders that I've sort of 'trained' to be sort of like short hedges.
Unfortunately, they've fought back by getting woody and leggy. How hard can I/should I cut them back to re-shape them properly?
-Sometimes- they seem get new growth from the wood, but mostly not. How do I tell what new growth will come from and what won't?
Finally, is now the time of year to consider this?