Variation in Artemisia pollen seasons in Central and Eastern Europe

► Start dates of Artemisia pollen seasons greatly depend on summer temperature. ► Mean minimum June-July temperatures tend to delay Artemisia pollination. ► The rate at which seasons become later increases when these temperatures reach 13 °C. Second peaks in pollen seasons occurred mainly in the area south of the Carpathians. ► Second peaks significantly influence the seasonal pollen sum (over 50% at one site).