I've moved rhodies (zone 5) before they bloomed and they bloomed
normally; just make sure they don't dry out. Actually, I think you can
move rhodies just about any time, they transplant so easily, but since
many of them are only marginally hardy in this zone, I prefer to have
them well established before winter. -Sue Sanders
Under good high shade, and rather obsessive watering - and with a damn
thorough job of digging and site preparation if I do say so myself - the
plant never even blinked and is thriving still. Seems I remember reading
the Brits are in the habit of moving 12-footers around like geraniums.
Steven