Assertion: tree pollen | /r/CapableOf | pop up in late march
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text: Tree pollen, for example, pops up in the spring (generally in late March to April), grass pollen arrives in the late spring (around May), weed pollen is most prevalent in the summer (July to August), and ragweed pollen takes over from summer to fall (late August to the first frost), says Dr. Parikh.