Zucchini, celery, strawberries, apricots and cherries are some low-carbohydrate fruits and vegetables. Dark, leafy greens such as Swiss chard and spinach are particularly low in carbohydrates.
Fruits and vegetables that are particularly sweet or starchy usually contain more carbohydrates than fruits that are less sweet or contain a substantial amount of water. Because fruits are generally higher in sugar than vegetables, they contain more carbohydrates on average.
Low carbohydrate fruits include coconut, honeydew, cantaloupe, passion fruit and watermelon. One whole passion fruit contains approximately 2 grams of carbohydrates. In contrast, one whole orange contains roughly 12 grams of carbohydrates. Avocado is an example of a low-carbohydrate fruit because it contains almost no sugar. Half of a medium avocado contains about 8 grams of carbohydrates, most of which come from fiber.
Atkins.com offers a list of vegetables that are acceptable during phase one of the Atkins low-carbohydrate diet plan. Some of the vegetables on the list that are lowest in carbohydrates include alfalfa sprouts, olives, watercress, radishes and chicory greens. Higher carbohydrate vegetables still within the acceptable range include tomato, snow peas, pumpkin and spaghetti squash. Half a cup of tomato contains about 8 1/2 grams of net carbohydrates, while a half-cup serving of alfalfa sprouts contains no carbohydrates.