Rhododendron blooming but looking sickly. Any ideas what might be happening?

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Here are pics of my rhododendron today and pics from April last year. I only got 3 blooms last year. Now I have more blooms but about 2/3 of the plant is gone (died). Anything you can think of that I might look for or do to prevent what's left from disappearing next year?
q rhododendron blooming but looking sickly any ideas what might be happening, gardening, Today 2012
Today - 2012
q rhododendron blooming but looking sickly any ideas what might be happening, gardening, Today 2012
Today - 2012
q rhododendron blooming but looking sickly any ideas what might be happening, gardening, Last year April 2011
Last year, April 2011
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