How to Prune Arborvitae Trees
Arborvitae Trees do not need to be pruned other than to remove a broken or dead branch from time to time. In fact certain types of pruning, like topping, can forever change the shape of your tree. You may like the side effects of topping if you are creating a hedge. Otherwise avoid this type of pruning. The best time to prune most Thuja Trees is in early spring, but minor trimming can be done at anytime. Avoid pruning trees in late fall. Pruning encourages new growth that can be damaged by harsh temperatures.
How to Plant Arborvitae Trees
How Fast do Arborvitae Trees Grow?
Green Giant Arborvitae can grow 3 to 5 feet per year. The growth rate for the Emerald Green Arborvitae is about 1 to 2 feet per year. Large Thuja trees tend to grow at a fast rate with smaller or dwarf arborvitae trees growing at a moderate rate. Although the rates vary with the size of the tree, all Thuja spp tend to grow at a fairly fast rate in relation to their mature size.
Where to Buy Arborvitae Trees
How to Get Rid of Bagworms on Arborvitae
Bagworms are a pain for Arborvitae Trees. The little green to brown cone looking cocoons are easy to miss. And once you notice them, they can be quite a problem. Look for bags in winter to alert you to the problem and caterpillar emergence in spring to determine the ideal time to treat bagworms. You want to treat your tree when the caterpillars are emerging and active. You can treat bagworms with Bacillus thuringiensis, spinosad, permethrin, carbaryl, or malathion between late May and June. Spray your entire tree to ensure full coverage. If your tree is young or small just trim off the bags and dispose of them.