American arborvitae

Watering your American arborvitae (Thuja occidentalis 'Sudwelli') is essential to keep it healthy and growing strong. This species of tree is drought tolerant but does need regular watering when planted. During the first year of growth, water the plant 1 to 2 times per week. After the first year, watering should be done about once a month, or when the soil becomes dry. During warmer months, you may have to water more frequently. Add enough water to saturate the root zone, and be sure not to overwater as this can cause root rot.

American arborvitae is a sun-loving plant species and should receive at least 6 to 8 hours of direct sunlight per day in order to thrive. In the northern portions of its range, it might be necessary to move the plant to a more sheltered area in order to protect it from winds and extreme cold during the winter months. During the summer months, the American arborvitae should have full sun exposure during the mid-morning and mid-afternoon hours when the sun is at its strongest. This will help the plant thrive and help to promote bushy growth.

American arborvitae (Thuja occidentalis 'Sudwelli') should be pruned in late winter or early spring and can benefit from shaping if needed. It is an evergreen variety, so any excess growth should be pruned out during these colder months when the plant is not actively growing. To keep form more manageable, remove about 1-third of the tree’s branches, targeting the oldest wood. Make sure to prune the branches at a 45 degree angle, making sure to leave no more than a quarter of any branch. Proper pruning encourages new growth and proper shape, so do not be afraid to prune it back if necessary.