I have an enormous lavender bush which flowers profusely each year - it is in excess of 10 years and is very woody at the base. Each year I cut it back to the bottom of the flower stems. If I were to cut it right back to the roots after flowering this year, would it re-grow? The bush is in a very confined area but it attracts so many bees that I would hate to kill it off. I also love the lavender flowers. Your advice please!