UA logo Allergy and Asthma in the
Southwestern United States
Information for patients with allergy and related problems
in the Southwest

Environment and allergic disease                     Return to menu

Tucson Pollen Calendars 

If pollen is released into the atmosphere in large numbers, it is capable of sensitizing people who are predisposed to allergy and asthma.  The microscopic appearance of pollen grains collected in air sampling devices usually allows identification of the type of plant from which the pollen came.  Study of the numbers of different pollen types in the air on a daily basis enables the development of pollen calendars, which can be useful to patients whose pollen allergies are known.   

Although Tucson has one of the longest continuous records of  daily pollen counts in North America, detailed daily pollen counts from a Counting Station certified by The National Allergy Bureau are not currently available in Arizona.  For lists of pollen types of seasonal importance in Southern Arizona, see  the Monthly Calendar, below.  Each month has a list of plants that usually produce allergenic pollen during that month.  The lists include major problem plants as well as plants that are mainly of local importance when prevalent in the neighborhood.


January February March April May June
July August September October November December

Types of pollen seen in the Tucson metropolitan area (see Tucson's Urban Pollen Calendar) differ somewhat from pollen types seen in the surrounding desert (see Tucson's Desert Pollen Calendar).  Pollen types in Phoenix, Mesa, Glendale and their contiguous urban areas are similar to those in the Tucson Pollen Calendar.  Pollen types in Casa Grande, Yuma, and Sierra Vista are probably similar to those in the Tucson Desert Pollen Calendar.  Pollen types in the higher elevations include Sagebrush and several species of Juniper, Cypress and Oak. 
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Disclaimer:   This site is for educational purposes only.  Any information that you have found in this web site is not intended to replace medical care or advice given to you by your own physicians. You should consider consulting your local medical library and other web sites for additional information. 

Comments and suggestions welcome!   Email: schumach@u.arizona.edu
Content Owner:  Michael J. Schumacher, MB, FRACP, The University of Arizona