The tree hazel could perhaps be described as THE great unknown. At first glance, very few people can name it directly, even though it has been planted here for almost 500 years. In recent years in particular, it has become increasingly popular as a street tree in urban areas. This is mainly due to its resistance to drought and exhaust fumes.

For several years now, however, at least in the state capital of Mainz, it has been less commonly used as a street tree, as it has proven to be susceptible to excavation, which is not uncommon in urban areas. At first glance, the crown of a free-standing tree hazel resembles that of a linden tree.

• Origin: Southeastern Europe, Western Asia
  
  
• Growth height: 18–20 meters
  
  
• Leaves: broad ovate; 8–12 cm long; usually double-serrated; dark green; bright yellow autumn color
  
  
• Flower: before leaf budding in February; yellow catkins up to 12 cm long; bee pasture
  
  
• Fruit: edible nuts in dense clusters
  
  
• Soil/location: very undemanding, loves sunny locations
  
  
• Special feature: The fruits of the tree hazel are significantly smaller than the well-known hazelnuts available in stores, but no less tasty.