Broccoli (It's high in allergy-relieving vitamin C and it's a member of the crucifer family, plants that have been shown to clear out blocked-up sinuses. ),
Pumpkin (Like broccoli and leafy greens, pumpkins are rich in allergy-fighting carotenoids, the form of vitamin A that you need to stockpile in order to better ward off allergies. If your only dietary experience with pumpkin has been in breads or pies, you may not know how versatile it can be.)
Carrots: Another carotinoid powerhouse, carrots contain lots of healthy beta-carotene to help ward off your ragweed misery. You'll get more of the valuable vitamin if you lightly steam your carrots, rather than eating them raw, or sauté them with a healthy fat, such as coconut oil/ghee a form of clarified butter.