The following pollens and foods are commonly associated: Birch pollen: Apples, almonds, carrots, celery, cherries, hazelnuts, kiwi, peaches, pears, and plums Grass pollen: Celery, melons, oranges, peaches, and tomatoes Ragweed pollen: Bananas, cucumbers, melons, sunflower seeds, and zucchini Typical symptoms include itching of the mouth and throat when the causative food is eaten.