Date Palm
Phoenix dactylifera
Also known as: Date Palm, Medjool Palm, Deglet Noor Palm, Edible Date Palm, Tamar , Nakheel
Why Date Palm Triggers Allergies
Date Palm is a tall, stately palm cultivated in Arizona both for date fruit production and as an ornamental landscape tree. Of all the palm species planted in the Southwest, it is best known as an allergy culprit with six formally characterized major allergens, documented asthma and rhinitis in palm-abundant communities, and cross-reactivity with both Bermuda grass pollen and date fruit itself.
Typical Symptoms
- Sneezing
- Runny nose
- Nasal congestion
- Postnasal drip
- Nasal itching
- Itchy eyes
- Watery eyes
- Red eyes
- Eye burning
- Itchy throat
- Oral allergy syndrome
- Coughing
- Wheezing
- Shortness of breath
- Chest tightness
- Asthma flare-up
- Fatigue
- Sinus pressure
- Sinus pain
Cross-Reactive Foods
- Date fruit
- Bermuda grass-related foods
About Date Palm in Arizona
Date fruit, Bermuda grass-related foods
Date Palm ( _Phoenix dactylifera_) is native to the arid regions of the Middle East and North Africa, where it has been cultivated for its edible fruit for at least 5,000 years. In Arizona, commercial date cultivation has a long history in the Yuma Valley and the Phoenix area, and ornamental specimens appear throughout the state’s low-desert communities as landscape palms. The tree is dioecious (male and female flowers appear on separate trees), meaning only male trees contribute to airborne pollen. Both sexes are planted widely in Arizona landscapes.
Date palm holds the distinction of being the most allergologically well-characterized palm species in the world. Six major allergens have been identified and characterized, with IgE binding observed in 60 to 93% of atopic patient sera depending on the protein band. Pollen.com rates the Phoenix genus as “severe allergies,” and Wyndly identifies the date palm as “best known for being an allergy culprit” among all palm trees. A study published in the _Journal of Allergy and Clinical Immunology_ examined residents in palm-tree-abundant communities and found that all asthma and rhinitis patients showed elevated total IgE, peripheral eosinophilia, and reduced FEV1, documenting meaningful airway disease associated with date palm pollen exposure.
Cross-reactivity with Bermuda grass pollen has been confirmed via IgG immunoblot analysis, meaning patients sensitized to one may react to the other. A dedicated clinical study examined cross-reactivities between date palm pollen polypeptides and foods associated with oral allergy syndrome, identifying date fruit itself as the primary food association. Patients with date palm pollen allergy may experience itching or tingling of the lips, mouth, and throat when consuming fresh dates.
Date palm pollen is lightweight and wind-dispersed, capable of traveling considerable distances from individual trees. In neighborhoods with high palm planting density pollen concentrations during February through April can be substantial. Male trees can be difficult to distinguish from female trees visually, and many homeowners are unaware of which sex they have planted. Allergy-sensitive homeowners who wish to retain date palms but reduce pollen exposure should consult an arborist about identifying and replacing male specimens.
Commonly Found In
Arizona cities where Date Palm is a documented pollen source.
Date Palm pollen season: Winter
Similar Plants to Date Palm in Arizona
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