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5 Spring Allergy Offenders

Learn when these plants produce pollen. Plus, tips for an allergy-free backyard

Red alder forest in Washington State Olympic National Park. — James Randklev/Getty Images

Red Alder

This is the tallest species of alder in North America, and the wood’s red tannin has been used as a dye. If you're allergic to alder, you may also have sensitivity to beech, birch and oak trees, which are in the same family.

When does it peak? February through April
Where does it grow? Cool and moist areas in the Western United States

Next: Smells like freshly mown fields. Achoo! >>

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