To dream of a carrot represents situation or habits that give you confidence that you aren't doing anything wrong. "Knowing" you're being positive. Confidence that you are being proper or that you're in the right. Intentionally doing nothing dishonest on purpose.
Negatively, a carrot may reflect feelings about having to be honest whether you like it or not in a way that is perfect certain. Feeling that staying out of trouble is being imposed by parents or authorities. Unpleasant feeling of having to be an honest person for the rest of your life because it's necessary.
Example: A man dreamed of seeing someone holding a carrot. In waking life he was planning to get revenge on someone whom he observed trying extra hard to behave honestly to avoid his revenge. The carrot in this case may have reflected his feelings about the enemy he wanted to get revenge on giving him difficulty doing so because of honest appearance the dreamer couldn't do anything about.