Maybe it has just "reached the end of its life span," as Dan McGill and LSU
said of a 50-year old giant in my front yard that exhibited the same behavior
(it's now 90% gone and still bravely blooming). Its identical twin, BTW---same
age, size, color, etc etc.--is its usual 7' high, 12' diameter self, blooming
like hell.

Leslie
New Orleans
zemedelec