A Euro-pollen map from the University of Vienna could eventually be helpful if you are travelling the continent over the next few months. However you may need to use a translator as it is in German.
There is an app available at www.polleninfo.org covering several countries.
Details at http://www.meduniwien.ac.at/homepage/news-und-topstories/?tx_ttnews[tt_news]=3354&cHash=ab4e3683aa
RAS