"Is it the wattle?
Not necessarily, says Associate Professor Janet Davies, from Queensland University of Technology's School of Biomedical Sciences.
Many of us associate hayfever with pollen from trees that come into flower in late winter and early spring (we're looking at you wattle). But wattle may be unfairly maligned in the allergy blame game, Professor Davies says."
On the other hand, grass pollen — our most common outdoor airborne allergen — doesn't fall straight down; it gets carried on wind and can travel vast differences. And grasses flower at different times of the year in different parts of the country.
"We don't have a uniform pollen season," says Professor Davies, whose research focuses on grass pollen allergies.
"We have different types of grasses in different places [within Australia] and they have different drivers for production of the pollen in the air."