Grass and Ragweed Pollen Allergies in the United States
Allergies affect people at different times during the
year. Here is a list of the most common types of pollens and the
time of year when they are most likely to be in bloom.
Flowering Seasons
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Pollen: |
Depending on where you live, the pollen
season can begin as early as January (in the southern states) and
lasts from February or March through October. |
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Trees:
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For each type of tree the flowering
period lasts roughly two weeks with the peak pollinating period
lasting only a few days. The tree season begins late February and
lasts until May. This may fluctuate in different
locations-starting in April in the northern United States to as
early as January in the south. |
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Grass:
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The flowering periods of each individual
species overlaps and begins in mid-March and lasts until
mid-August (depending on your region). Most people allergic to
grass are allergic to more than one species making this a long,
drawn-out suffering period. |
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Ragweed:
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This is the worst season of all because
it is one of the most potent allergens and it has a long season.
The pollination of ragweed lasts between six to eight weeks and
occurs at roughly the same time every year. The season ranges
from mid-August through November or until the first frost. Pollen
levels usually peak in mid-September. |
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