American arborvitae

American arborvitae (Thuja occidentalis 'Wareana Lutescens') should be watered consistently, but not too much. It is best to water this plant deeply but infrequently. The soil should be allowed to partially dry out between waterings. On average, this plant should receive about 1-1.5 inches of water once every 7-14 days during the growing season which is usually between April-September. During the cold months of October- March, water should be given monthly. Overwatering can cause root rot and other problems, so it is important to not give too much.

The American arborvitae needs at least 6 hours of direct sunlight each day, preferably in the morning, in order to survive and thrive. It can tolerate partial shade, but doing so may result in stunted growth and reduced flowering. It can also tolerate some direct, midday sun, but should not be exposed to intense afternoon sun in order to prevent sunburn and other health issues. During the summer, placing the plant in a shadier spot for part of the day can help protect it from the more extreme temperatures and prolong its life.

American arborvitae should be pruned once a year in late winter or early spring. This should be done after any danger from winter frost has passed. This pruning should focus on the removal of dead wood and to shape the tree or shrub to the desired form. Where needed, remove dead, damaged, or diseased branches and any crossing or rubbing branches. Minor pruning can also be done during the growing season, but this should be kept to a minimum as it can encourage increased growth that may not be beneficial to the health of the plant.