Question
Hello.  I live in Louisville, Kentucky (I'm not sure of the zone number), and I have two six-year-old climbing Joseph's Coat roses.  This year all of the roses on ONE of the rose bushes are a bright crimson (completely solid color).  They are planted approximately 5 feet apart, and I have not put any chemicals on or around the roses.  Also, no new plants have been placed anywhere around the rose.  We had a particularly snowy and cold winter.  Thanks for the help.

Answer
Your Joseph's Coat was budded onto an understock called Dr. Huey. Dr. Huey is a nice red climber and is very hardy. What has happened is because Joseph's Coat is not hardy, the nasty cold winter has killed it and the understock or Dr. Huey, has taken over. Next winter, to make sure your other Joseph's Coat is protected,  have it mounded up about 12 inches of compost, mulch or soil, all around the base of him to make sure he will come through a cold winter.