American elm

American elm trees should be watered once per week, or at least every 5 to 7 days. Water deeply so that the roots receive a thorough soaking. Water in the morning hours, when temperatures are still relatively cool and the sun is not as strong; this helps reduce water evaporation. Depending on the size of the tree, use at least 10 to 20 gallons of water every time it is watered. Allow the water to penetrate the soil around the tree's roots as this will encourage deep and healthy root growth. If the soil is dry, increase watering slightly to ensure adequate hydration. Overly saturated soil can lead to issues like root rot, so be sure to monitor the soil moisture levels.

American elm trees prefer full sun for optimal growth. For healthy growth, they should receive at least 6 to 8 hours of direct sunlight a day. During the summer, a partially shaded spot is also suitable as long as the tree receives at least 4 to 6 hours of direct sunlight daily. During the winter, American elms should receive full sun to remain healthiest.

The American elm (Ulmus americana) should be pruned during the winter when the plant is in its dormant season. Pruning should be done carefully and the removal of dead or diseased branches is necessary to avoid the spread of disease in the tree. Pruning should be limited to removing no more than 1-third of the plant’s total foliage to ensure the desired shape and size of the tree. Additionally, crown thinning should be done to promote the density of foliage and improve air circulation between branches. This will create more space for better light penetration, resulting in healthier growth.