Pollen report

Vegetation in town:
Information guide about plants with allergenic pollens


Pollen diary
Compare your symptoms to pollen concentrations on pollendiary.com

Updated 20th of September

The leaves fall but ragweeds don’t.

As autumn comes to France and leaves fall from the trees, ragweed is resistant and still releases high concentrations of allergenic pollen in the air. The risk of allergy will still be high in Nièvre, Nord Isère, Ardèche and Drôme. It will be moderate in Ain, Rhône and Loire. Some grains of ragweed are also present in the West of the country but with an allergy risk not exceeding the low level except in the Mareuil sector where the allergy risk may reach the moderate level.

On the weather side, the beginning of autumn will come with the return of rain from Saturday evening until Monday morning. This rainy area will cross the whole country from West to East and will be very strong on Languedoc-Roussillon on Saturday and on the Rhône valley and the Provence-regionAlpes-Côte d'Azur on Sunday with a Mediterranean episode announced by Météo-France. This cooler and wetter weather will stop ragweed and lower pollen concentrations in the air for the delight of allergic people.

You can still report the presence of ambrosia using the Ambrosia Alert platform (www.signalement-ambroisie.fr): each plant removed means less seeds released. It is therefore today that we must act to eliminate ambrosia and prevent it from gaining ground in the years to come! It is important to take the necessary precautions to avoid any health risks, for instance wear gloves and a mask to avoid inhaling the pollens. Plants may be left on site to avoid unintentional seed release.

Apart from ambrosia, the other pollens (grasses, nettles, plantains and mugwort) are present in very low concentrations and will not cause too much discomfort to allergic people with a very weak risk.

Ragweed and its pollen

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