For the gardener who wishes to have an ornamental tree that requires virtually no maintenance once established, planting the Emerald Green Arborvitae may be the perfect choice. It is also great for an ego boost, as it is practically impossible to fail in your endeavors to grow and cultivate this tree. It is possible to transplant the Arborvitae during either spring or fall but, if planted in the spring, you will have to nurse it through the heat of the summer. On the other hand, if you plant in the fall, it allows the tree time to establish a root system before being confronted with the harsh conditions of summer.
Thought the tree prefers moist, alkaline soil, it is not a requirement. The Emerald Green Arborvitae will grow in any soil, regardless of its pH level or moisture. Their one requirement is that they be grown in colder climates. Only hardy in zones 3 to 7, this tree will not grow in areas where the climate is too warm. For best results, Arborvitae should be planted in an area where it will receive either full sun or partial shade. When the plant doesn't receive enough light, it may begin to lose some of its foliage.
When planting Arborvitae, you should only give them a thorough soaking once a week. Although it probably wouldn't kill them, overwatering will cause the foliage of the tree to turn brown, making it an eyesore. However, lack of water can also cause this same problem. Either way, it means that your plant is receiving too little oxygen so readjust water frequency accordingly.
If you are planting as a hedge, it is necessary that you leave 3' to 4' apart, as this will provide them with ample room to grow and establish its roots. When crowded together it will also reduce the amount of light the tree receives, resulting in defoliation.
With these tips, you will be able to maintain lush, healthy arborvitae trees as part of your garden design.