cupressus

Question

why is my potted cypresses sempervirens totem going brown?

Answer 1

There are a few possibilities. This could be lack of water, damage from herbicides, salts, or other toxins, or the following two pests:

http://hortsense.cahnrs.wsu.edu/Search/MainMenuWithFactSheet.aspx?CategoryId=1&SubCatId=3&PlantDefId=2&ProblemId=299

http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/spruce-tree-diseases/cytospora-canker/

These pests affect both Cupressus and other conifers. Check whether the discussed symptoms match your tree.

https://www.gardeningknowhow.com/plant-problems/environmental/herbicide-plant-damage.htm