POLLEN IN LOS ANGELES

Outlook for November

Trees: The next two-month period is the most dormant of the year.

Weeds: They should remain active through the month, with mugwort, ragweed and lamb’s quarter most prevalent.

Grasses: Grass pollens are not a factor until spring, although winter rye seedings do produce localized, measureable pollen.

Molds: Mold spores will vary greatly in relation to rain and humidity, and will generally be the greatest pollen source in November and December.

Note: Indoor allergy control measures remain very important in winter, despite generally lower pollen counts. Fall winds are still a factor as well.

Source: Asthma & Allergy Foundation of America, Los Angeles Chapter