The article is devoted to the comparative analysis of the English, German and Russian phraseological units with phytonym components, namely the names of trees. The relevance of research is defined by the contemporary interest to the continuous interaction between different languages and intercultural communication. Phraseological system of any language is an important source of cross-cultural information which reflects the collective consciousness of the language community. The aim of the study is to reveal semantic and structural peculiarities of phraseological units with names of trees in three languages: English, German and Russian. The article deals with different types of phraseological units, including proverbs and sayings, with the names of trees in their structure.