The grass pollen season begins in mid to late April and is present through
the summer until early October. The grass pollen season begins at the peak
of the tree pollen output. Grass pollen season correlates roughly with the
beginning of, and the end of the "dreaded grass cutting season."
Interestingly, the major grass pollens causing allergic rhinitis are
not domestic grasses, with the exception of Bermuda, but "wild" grasses such
as Johnson, Rye and Kentucky bluegrass.
There is a brief break for allergy sufferers in July when the trees have finished pollinating,
the grass pollen counts drop significantly and the weeds have not yet started to bloom.
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