Pine pollen allergy
Pinus
Pine pollen is the yellow dust of spring. Allergy to it is relatively uncommon, and smaller pollen from trees that shed at the same time causes more trouble.
What it is
Pines are cone-bearing trees in the genus Pinus. In spring, their male flowers make billions of pollen grains and release them into the air over several weeks.3 Each grain has two air sacs that keep it buoyant, so the wind can carry it a long way.2 Pine pollen can travel very long distances through the air.1
This is the yellow film that settles on cars, sidewalks and outdoor furniture each spring.3 The grains are relatively large compared with other tree pollen.2 They are big enough to see, and they leave a gritty dust on porches and patios.4
Which pines matter depends on where you live. In North Carolina, NC State Extension writes about the spring pollen season of loblolly pine.3 Eastern white pine grows through the cool, humid eastern part of North America.5
Symptoms it causes
Pine pollen allergy exists, but it is relatively uncommon.1 A University of Arizona Cooperative Extension guide notes that pine pollen is generally not considered allergenic.6 Robert Bardon, a forestry professor at North Carolina State University, says that because of their large size and smooth surface, pine pollen grains are less likely to be breathed deep into the airways.2
When pine pollen does cause allergy, it is breathed in and the symptoms look like hay fever. They can include itchy, watery or red eyes, puffiness under the eyes, a runny or stuffy nose, sneezing and coughing. Pollen can also make asthma worse.1
Pine pollen shares its season with other trees. In North Carolina, pines shed at the same time as hardwoods such as oaks and hickories, whose pollen is microscopic and easier to inhale.2 Bardon suspects that people often mistake the visible pine pollen for the hardwood pollen that is actually causing their allergies.2 A 1999 University of Georgia article made a similar point: few people are allergic to pine pollen, and the small pollens of oaks, walnuts and hickories cause more hay fever.4
Pine nuts are a separate allergen. They are the edible seeds of some pines, and an allergy to them is a food allergy that can cause a severe, whole-body reaction (anaphylaxis). Cross-reactions between pine nuts and pine pollen have been reported.1
Where and when it grows
Pine pollen is released in spring, when the trees reproduce.1 In North Carolina, pines usually release pollen in March and April, inside a wider tree pollen season that runs from February to May.2 Eastern white pine forms its cones in spring, typically between May and June.5
Warmth sets the start. NC State Extension counts heat from February 1, and pine pollen release typically begins after about 300 degree-days above 55°F, with the peak near 636 degree-days.3
Within the season, pine pollen in the air tends to be highest early in the morning on warm, dry, breezy days, and the whole season can last weeks.3
Pine pollen is a spring problem. Allergist Allen Meadows, MD, quoted by ACAAI, says that by Christmas time the tree pollens are all gone, and that pine tree allergies and Christmas tree allergies are separate things.1 Mountain cedar in Texas is the exception: the Texas A&M Forest Service says the trees typically begin producing pollen in mid-December.7 Our guides to cedar fever and Christmas tree allergies cover both.
Cross-reactions
| Can also react to | What happens |
|---|---|
| Pine nuts | Cross-reactions between pine nuts and pine pollen have been reported. Pine nut allergy is a food allergy and can cause a severe reaction.1 |
Guides
When to get help
See an allergist if
- Allergy symptoms last for several months of the year
- Allergies bring repeated sinus problems, a blocked nose or trouble breathing
- Over-the-counter remedies don’t control your symptoms
- Allergies or asthma get in the way of daily life
- You often wheeze, cough at night or after exercise, or feel short of breath
Based on ACAAI’s “When To See an Allergist”. General information, not medical advice.
Questions
Is the yellow pine dust what makes me sneeze?
It may not be. In North Carolina, pines release pollen at the same time as oaks and hickories, whose pollen is microscopic. Robert Bardon, a forestry professor at NC State, suspects people often mistake the visible pine pollen for the hardwood pollen that is actually causing their allergies.2
Can you be allergic to pine pollen?
Yes, though it is relatively uncommon. The symptoms are like hay fever: itchy, watery eyes, a runny or stuffy nose, sneezing and coughing. Pollen can also make asthma worse.1
Are Christmas tree allergies caused by pine pollen?
No. ACAAI says pine pollen is produced in spring, and the allergist it quotes says pine tree allergies and Christmas tree allergies are separate things.1
Is pine pollen allergy the same as pine nut allergy?
No. ACAAI treats them as two different allergens. Pine nuts are the edible seeds of some pines, and an allergy to them can cause a severe, whole-body reaction (anaphylaxis). Cross-reactions between the nuts and the pollen have been reported.1
Sources
- Pine Tree “Allergy”. American College of Allergy, Asthma and Immunology. Read on October 28, 2026.
- Pine Tree Pollen Unlikely to Cause Spring Allergies. North Carolina State University, College of Natural Resources. Read on October 15, 2026.
- Predicting the Start of the Pine Pollen Season. NC State Extension. Read on October 15, 2026.
- Don’t Blame Pine Trees for Springtime Sneezes. University of Georgia College of Agricultural and Environmental Sciences. Read on October 15, 2026.
- Eastern White Pine Fact Sheet. University of Maine Cooperative Extension. Read on October 15, 2026.
- Pollen Allergies. University of Arizona Cooperative Extension. Read on October 15, 2026.
- Cedar fever season in Texas. Texas A&M Forest Service. Read on October 28, 2026.
Corrections
- : We said tree pollen is gone by December. The allergist ACAAI quotes says “by Christmas time”, and mountain cedar in Texas begins producing pollen in mid-December, so the page now says both.