Weed pollen is produced from late summer to early fall. Pollen is released into the air.

You can see weed pollen and other pollen as it is fine and powdery. You probably will not see pollen in the air. But if you're allergic, your body most likely will react even to small amounts. Allergies below have links to specific information about it

Weed Allergies that Allergy 123 tests for and creates personal treatment plans for using home-based immunotherapy:*

* Tests vary slightly by state because each state has different concentrations of species