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Southwestern United States
Information for patients with allergy and related problems
in the Southwest

Tucson Pollen Today and Tomorrow - February

Several deciduous trees will begin to flower this month, but several days of hard freeze this January may have reduced their potential for pollination.  Fraxinus (Ash) and Cottonwood will begin to flower and Rhus lancea  will continue to release pollen. Members of the Cupressaceae including Juniper and Cypress pollen will continue in the air through February and March.  Ambrosia deltoidea (triangle leaf bursage, rabbit bush) will begin to flower late this month.  Ambrosia ambrosiodes (canyon ragweed) has been damaged by recent freeze but is growing back and will flower later than usual this year. Most of the grasses will not release much pollen until late February.  Eucalyptus and Pine are beginning to flower at this time, but neither of these are important allergens.  

Note:  This information is based on ongoing observation of flowering allergenic plants in the Tucson metropolitan area, and not on pollen counts.  Appearance and persistence in the air of any particular species of airborne pollen are expected to be later than the onset and duration of flowering of the plant of origin.                                                                    Back


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
Updated 2-1-2013