Name: Susan Virginia (Zone 8a) God is the only thing that matters.
Sorry for a late response Rose. I always thought Hydrangeas liked some shade, not quite sure how much. Also it could be iron chlorosis. See if this article helps.
Consider the lilies of the field, how they grow; they toil not, neither do they spin: And yet I say unto you, That even Solomon in all his glory was not arrayed like one of these. Mat.6:28-29