Do carrots or broccoli mold faster?

Broccoli by a large margin molds faster than carrots. In my personal experience, and I eat a lot of steamed veggies containing both of these plants (nearly every day), mold will begin growing on broccoli in about a week and carrots are often free of the fuzz until two or three weeks after purchasing. Of course, this depends largely on how old the produce is at the time of purchase, and whether it is organic or not. Many of the chemicals that are used on non-organic produce inhibit the growth of mold, so it may last longer in this case.