Trees: Alder and walnut are blooming extremely early this year. Black walnut is the worst allergy offender of the walnut family.
Weeds: Weed season has finally ended.
Grasses: Grasses will be mostly dormant until late February, early March.
Molds: Molds will continue to be sporadic and with major increases following periods of precipitation.
Source: Asthma & Allergy Foundation of America, Los Angeles Chapter.
A free brochure, "Common Allergenic Plants of Southern California", is available by writing AAFA, 5410 Wilshire Blvd., 1008, LA, CA 90036.