Tucson Pollen Today and Tomorrow - March

Allergenic deciduous trees including  Cottonwood  flower this month.  Fraxinus (Ash) and fruitless Mulberry trees are beginning to flower.  Members of the Cupressaceae including Juniper and Cypress pollen will continue in the air through March.  Ambrosia ambrosiodes (canyon ragweed) and Ambrosia deltoidea (triangle leaf bursage, rabbit bush) are mostly not  flowering yet.  Frost in Tucson affects mostly non-allergenic plants but does not damage ragweeds or deciduous trees.   Pine trees are releasing relatively non-allergenic pollen.  Most of the grasses are dormant, but Bermuda grass is starting to flower already.

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 of any particular airborne pollen species in the air are usually days or weeks after the onset 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 3-1-2009