Pollen Calendar for Austin, TX
Mountain Cedar- In Texas, mountain cedar is probably the biggest producer of pollen during the winter.
Fall Elm - The Fall elm, given its name, is a large allergen in the fall, specifically September, but can also pop up in February/later winter.
Oak - Oak bothers people mainly in March and April, but can affect people as early as February and as late as June.
Pecan - Pecan is a another tree that surprisingly affects many people. It tends to produce its pollen in April but can throughout all of spring.
Other trees that produce a lot of pollen include Willow, Mulberry, Sycamore and Ash, which all are predominant in the spring.
Ragweed - Ragweed is the biggest allergen and occurs in the Fall, specifically September and October.
Marsh Elder - This bush-like plant causes issues in late August, and early September.
Pigweed - While it doesn't really have a peak, Pigweed consistently is an allergen from July to November.
Other weed allergens include Sage and Red Berry Juniper.
Grass and Mold
Grass and mold are a consistent problem for people throughout the year. Grass is more dorment in December and January (most of winter), but is pretty consistently allergenic about 9 months of the year. It peaks in the summer due to people mowing their lawn. Mold never goes away as long as there's moisture. It really only affects people that have a specific allergy to mold.