black willow

Black willow trees require consistent and regular watering, especially in the first year after planting. For established trees, deep watering once per week is usually sufficient. During the heat of summer, water thoroughly once every 5-7 days, depending on the rainfall and temperature. For young trees, water twice a week for the first 3 months, then gradually decrease the frequency. Water the base of the tree, avoiding wetting the foliage, and keep the soil evenly moist. During the winter months, water every 2-3 weeks, or as needed.

Black willow requires a minimum of 4-5 hours of direct sunlight daily in order to thrive. It is able to tolerate partial shade conditions, but will generally grow less vigorously in these settings. If planted in a sunny location, it should be shaded from the insolation during the hottest part of the day – between 11:00 and 15:00 – to prevent scorching and leaf burn. For optimal growth, the plant should be situated where it will be exposed to at least 6 hours of sunlight and shade during the day.

Black willow (Salix nigra) should be pruned in late winter or early spring. Pruning should be light and selective, removing mostly dead wood, weak, damaged or diseased branches. The tree should also be shaped, which includes removing any errant stems or shoots. Heavy pruning of black willow should be avoided, as it is more susceptible to disease and pests. When heavy pruning is necessary, it is best to perform it over several years, as this is a more effective way of ensuring its long-term health.