I bought a Kyushu Hydrangea plant 2 months ago from a nursery, now its
leaves are gradually wilting/dying, from the bottom up. What can I do
to save it?

Pics of it at
http://firemanacab.00freehost.com/A.JPG
http://firemanacab.00freehost.com/B.JPG
http://firemanacab.00freehost.com/C.JPG

I tried doing a search for Kyushu Hydrangea on usenet hoping solutions
are already given, but found nothing on it. Is it known by another
name and is there a commonly used name for it?