10 Invasive Plants That  Can Also TriggerAllergies

Every spring through autumn, plants release tiny pollen grains that fertilize plants of the same species.

Weeds, grasses, and trees are the primary sources of pollen that can cause allergies. An allergy to pollen is called allergic rhinitis, more commonly known as hay fever.

Here's a list of some invasive plants that can also trigger allergies.

Toadflax has an allergen index of 4 out of 10, making it a  moderate allergen.

Dalmatian Toadflax


Johnsongrass is a moderate allergen and was originally introduced in the U.S. as a  forage crop.

Russian Knapweed

These plants are members of the daisy family, making anyone prone to daisy allergies also vulnerable to Russian knapweed’s pollen.

Quackgrass Quackgrass grows in disturbed open areas, where natural vegetation has been removed to expose the  underlying soil.

Absinth Wormwood

Those who suffer from spring and summer seasonal allergies may not be spared from absinth wormwood—especially since this plant is perennial.