Los Angeles pollen counts can fluctuate during the year, there are general rules of thumb though regarding the pollens. The major classes of pollen are trees, grasses and weeds. Generally the trees pollinate at the beginning of the year, the grasses pollinate in early spring through summer and the weeds pollinate at the end of the summer through early fall. Here below I will go through each of the major Los Angeles pollens and show which months that they peak in.
Starting in alphabetical order are when the trees pollinate
Acacia Tree-January, February, March
Alder Tree-January and February
Ash Tree-January, February and March
Cottonwood Tree-February and March
Elm Tree- February, March and August, September and October
Juniper Tree-January, February, March and April
Maple Tree- April and May
Mesquite Tree-April, May, June and July
Mulberry Tree-March and April
Oak Tree- February, March and April
Olive Tree-March, April and May
Sycamore Tree-February, March, April and May
Walnut Tree-March, April and May
The next season is the grass pollen. The grass pollens are all related to each (except Bermuda grass), meaning if you are allergic to one, you are likely allergy to the other ones. Nevertheless, here is a list of all the categories of grass pollen in Los Angeles.
Bermuda grass-March to October
Blue grass-January to July
Italian Rye grass-June to August
Johnson Grass-May to September
Redtop Grass-June to October
Oat grass-March to June
The next major pollen season is the weed pollens. Here is the list below of the major families of weed pollens that pollinate in Los Angeles Southern California.
California Sagebrush-August to December
English Plantain-April to August
False Ragweed-August to November
Lambs Quarters-May to October
Mugwort Sage-July to November
Pigweed-June to October
Russian Thistle-June to October
Scale-May to October
Western Ragweed-July to December
Pollen counts in Los Angeles can change throughout the year, but the above list gives you a general idea when specific trees, grasses or weeds pollinate. You can also check out exact pollen counts through apps or websites that are easily found on the internet that will give you daily pollen counts.
Living in Los Angeles, if you are allergic to all of the different pollens, there are really no months that we don’t encounter some sort of pollen. The lowest pollen count months in Los Angeles are November, December and January. Although there have been some years where even those months we have had elevated pollen counts. If you are suffering from seasonal or perennial allergies it may be a good idea to consult with an allergy specialist to figure out what you are allergic to and how to best manage your symptoms. Allergy testing is a simple procedure performed in the office and you can know very quickly whether or not you are allergic to these pollens.
To learn about common symptoms and treatment for allergic rhinitis, please click on this link.