From the Darwinian Gardener in the Daytona Beach News Journal on a method of telling a rhododendron from an azalea.
Q. My wife and I are having this argument about a flower bush out back. Is it an azalea or a rhododendron?
It's an azalea.
But if you want to find out for sure, try this test. Ignore the plant for a month and then check back on it. If it's dead, it's a rhododendron. Rest in peace. If it's bright and boisterous, it's an azalea.
Rhododendrons don't live here and anything you do to pretend otherwise only prolongs the inevitable.
An azalea, on the other hand, either loves its plot of ground and none of your misguided "help" will do much, or it hates where it is and none of your misguided "help" will do much.