Although most vegetables are pretty low in calories and carbs, we recommend that you track all of the carbs in vegetables because these can really add up! For example, broccoli, asparagus, and cauliflower only have about 6 - 8 grams of carbs per cup—and half of this is fiber. But if you consider these a "free" food and fail to track the carbs, a few servings can put you quite a bit over your recommended macros (especially if your goal is weight loss and you’re on low calories).
By tracking everything you eat, you’ll eliminate a lot of possible error and give yourself the best chance to meet your goals.