Common mugwort (Artemisia vulgaris) is widespread on vacant land, beside roads and railways, and at field edges. It is wind-pollinated, and its pollen can be an important allergen in the second half of summer. It should not be confused with ragweed (Ambrosia artemisiifolia), although both weeds can grow in disturbed habitats.
When and where does it pollinate?
In Poland, mugwort usually pollinates from July to September, often before ragweed’s peak and partly at the same time. Timing and intensity vary with weather and local mowing. Plants beside railways, on unmown verges, and on vacant plots can increase local exposure, while pollen can also arrive from farther away.
Typical symptoms include sneezing, a watery runny nose, nasal blockage, and irritated eyes. For sensitized people, symptoms may overlap with the late grass or ragweed season. A positive mugwort test alone does not prove which plant causes symptoms; an allergist should interpret it.
Orientative forecast
Values for Polish cities come from CAMS through Open-Meteo. They are modeled, not measured locally; the pelud.net result is orientative. The risk method shows that mugwort and ragweed have a low reference threshold, so a small grain count need not mean low exposure for a sensitive person.
Reducing contact
In late summer, check the forecast before working on an allotment, do not mow flowering weeds without protection, and change clothes after coming home. Use medication only after advice. Breathlessness or throat swelling needs urgent help.