You're welcome Becky. Frankly I can't make heads or tails of the rust resistance ratings and because we are in FL where rust is a fact of life it seems then I really don't pay a whole lot of attention to those ratings when I am selecting dl's for my garden. I look at it this way...... if a dl doesn't get rust in my garden then I am overjoyed but if it does then I know it's pretty much par for the course in FL and try to take it with a grain of salt. So far so good here but I'm not going to say anything more than that for fear of jinxing myself.