Within the Czech Republic the contest has had a fifteen-year-old history. Thanks to our partners and sponsors – namely ELO, Tetra Pak, State Environmental Fund and Ministry of the Environment of the Czech Republic - since 2010 this concept been implemented in other European countries as well. So far  the contest has attracted more than 2 million Europeans who got involved either by sending a tree nomination or by casting a vote.
As of today, the national contests already take place in sixteen European countries, in which the general public votes for the tree of their choice. The winners of each national contests subsequently participate in the European Tree of the Year contest.
Organisations running the national Tree of the Year contests:

Belgium - Fondation Wallonne pour la Conservation des Habitats and Stichting Behoud Natuur en Leefmilieu Vlaanderen (SBNL)
Bulgaria - Bulgarian Environmental Partnership Foundation Facebook
Czech Republic - Environmental Partnership / Facebook
England and Northern Ireland – Woodland Trust
Estonia - Arboristide Koda
France - Terre Sauvage / Facebook 
Germany - Deutsche Dendrologische Gesellschaft e.V.
Hungary - Hungarian Environmental Partnership Foundation / Facebook
Lithuania - Lithuanian Arboricultural Center
Poland - Klub Gaja
Slovakia - Ekopolis Foundation
Scotland - Woodland Trust Scotland
Spain - Bosques Sin Fronteras
Ireland - Just Forests
Wales - Woodland Trust Wales