Jena, 07.08.2026: The effects of climate change are clearly visible in Jena’s cityscape. Persistent heatwaves and lack of precipitation are placing significant strain on the entire tree population, leading to health issues for many plants.
- Affected: Approximately 77,500 registered urban trees
- Measures: Irrigation by KSJ using water trucks and Multicar vehicles
- Citizen assistance: Watering of young trees (60-100 liters during dry periods)
- Reporting portal: maengelmelder.jena.de
- Tree donations: ksj.jena.de/baum-patenschaften-baumspenden
Challenges for the urban climate
Urban trees act as natural air conditioning systems, providing cooling through evaporation. However, increasing water stress hinders their development. According to Kommunalservice Jena (KSJ), the lack of water leads to premature leaf drop, the dieback of crown sections, and restricted formation of fine roots. Sealed surfaces and limited root space in urban areas exacerbate the situation.
Practical tips for active support
Support from residents is crucial for the survival of young trees during their first three to five years. KSJ recommends watering less frequently but thoroughly during persistent dry periods – ideally with a water volume of 60 to 100 liters per application, preferably in the early morning or late evening hours.
🏛️ Significance for the urban climate
Jena places great importance on climate-resilient urban development. In infrastructure projects, such as those in August-Bebel-Straße or Tatzendpromenade, the city continuously integrates new tree locations. These green oases are essential for mitigating overheating in densely built-up areas during the summer months and ensuring long-term quality of life.
Additionally, tree pits should be kept clear of vehicles to avoid soil compaction. Damage or diseased trees can be reported directly to the relevant departments via the City of Jena’s digital defect reporter, providing the individual tree number.
Source:
Drought and water stress: Urban trees in Jena are under pressure
Transparency note: This article was created automatically, editorially reviewed, and expanded with AI support.