For the first few years, watering is the most important thing you can do for your tree. It may also be the most difficult task to accomplish. Transporting water from the source to the tree is a challenge. Furthermore, because pollution and compression due to foot traffic, urban soil has difficulty absorbing water. This means that you need to cultivate or loosen the soil so that the water can reach the tree’s roots. There are a number of different tools and techniques available to aid your watering efforts.