from employee blog
Pour a large amount of water 1-2 times a week.
Recommendation: 150-200l = 2-3 fillings of a tree bath watering bag per watering.
In addition, you can help city trees very well by loosening the upper soil layers to break up the strong compaction of the soil in cities. This often means that when watering or when it rains, the water cannot penetrate the ground at all to reach the roots of the tree, but simply runs off the surface.