Old Philadelphus needs help!
We have a 30 year old Philadelphus (Mock Orange), which for a long time, had multiple shoots, 8/10 feet high, and in June it was smothered with fragrant blossoms.
Since 3/4 years, all is left is a pitiful 4 feet stick.
I was wondering if it's a good idea by cutting down the only branch and hoping it will "rejuvenate". If so, should I do it now, or shall I wait after it has flowered?
Any help would be appreciated.