For anyone suffering from hay fever, otherwise known as allergic rhinitis, a stroll in the park or admiring the flowers may cause much more suffering than joy. Instead, itchy watery eyes and a runny nose may send you right back inside. When pollen gives you grief, it may be helpful to know some of the most common allergy-causing plants and trees, their peak seasons, and where they thrive. Here are the top five culprits, as presented by Health.com:

Ragweed

Found in abundance in the Midwest and the Mississippi River basin, you