At least two possibilities if you react to fresh cut grass.
Grass allergy (late spring, kicks up the pollen)
Mold allergy (year around)
I clearly have a problem with fresh cut grass. I suspect mainly the mold being kicked up when the lawn is mowed.
Unfortunately, I may also have grass allergy. Haven’t got tested for it yet but I get sneezing fits in May out on the grass even when it’s not freshly cut. And possibly related to my grain food allergies. After all cereal grains are the seeds of grass.
In the central and northern United States and Canada, grass generally pollinates in May, June and July. Farther south, the pollen starts filling the air a couple of months earlier.
• Avoid being the person who cuts the grass in the pollinating months of May through July. The lawn mower kicks up the pollen and sends it into your eyes and nose. If it’s only grass allergy you’re contending with, you may be fine to mow the lawn in other months.
Kim notes however, that “often patients will have allergy symptoms with fresh cut grass in August or September. That’s not grass pollen allergy, that may be mold allergy from the molds being stirred up.” As well, Stark cautions that the dust the lawn mower creates while it’s trimming can get into your nasal passages like pollen, and also cause symptoms.