How can artificial intelligence (AI) help with the efficient watering of trees? Our Quantified Trees (QTrees) research project focuses on quantifying the current condition of Berlin’s urban trees, which are increasingly suffering from the effects of climate change. The app “Baumblick” shows whether an individual tree is being adequately supplied with water. Sensors are used to measure the so-called soil moisture tension to determine how dry or wet the soil is. Using an AI model to analyze this data, we then attempt to identify patterns and predict the current and future water supply for all city trees up to 14 days in advance. The app also raises awareness for the topic of urban tree care and watering trees and invites people to get involved, thereby helping to improve the AI model.