Is pollen from certain trees, flowers or weeds more allergenic than others?
The simplest answer is yes. Pollen that get airborne are of more concern than those that are insect pollinated. Airborne pollen are the ones that cause allergies because they can be inhaled. Insect pollinated ones, such as from flowers, are not of much concern. Flowers are only a problem to highly sensitized individuals who are exposed by touching the plant and perhaps inhaling lots of pollen from their hands. Often what people are reacting to when it comes to decorative flowers and plants is the scent and not the pollen. It is also important to note that pollen from certain trees and weeds and grasses are more allergenic than others. Box-elder (a species of maple) is highly allergenic, whereas the pollen from poplar is less so. Ragweed is one of the most highly allergenic plants.
