What will cause a rose to turn brown and die around the edge of the leaves?

The rest looks fine, just the edges are dying.
What will cause a rose to turn brown and die around the edge of the leaves?
TO MUCH OR TO LITTLE WATER
Reply:If the leaves are turning brown the rose needs more water.
Reply:it's natural! roses when in bloom, do not last but 3 to 4 days!
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