March brings the continued pollen release for eastern redcedar (Juniperus virginiana) and American elm (Ulmus americana). During March pollen levels of these two species will gradually decrease and by late March will be at moderate levels. During this month we will start to see other trees releasing pollen including red maple (Acer rubrum) and boxelder (Acer negundo), oaks (Quercus spp.), ash (Fraxinus spp.), river birch (Betula nugra), mulberry (Morus spp.) and others. Click on the link for more information on March pollen.