Distressed Arborvitae Technito

Asked July 27, 2017, 2:27 PM EDT

Five 5 ft tall trees planted in a row about 1 month ago & getting good watering, very sandy soil. Western exposure. Middle tree is looking "faded" green. Otten Brothers suggested possibility of spider mites but no "webbing" seen. I do see very tiny insects after shaking leaves on white paper on all 5 trees & other healthy arborvitae in our yard so uncertain if it is mite/pest problem, lack of good soil, watering issue or other problem. Any help you can provide would be much appreciated as these are new (& costly!) shrubs. Thank you.

Hennepin County Minnesota arborvitae horticulture

1 Response

It is not unusual for plants in the ground only a month to show signs of stress. And stressed plants are more susceptible to insects and disease. The stress is called transplant shock, and it is the reason we urge people to exercise great care when planting new shrubs and trees:
https://www.extension.umn.edu/garden/yard-garden/trees-shrubs/planting-and-transplanting-trees-and-s...

Depending on how well the site was prepared, water (too much or too little) can be an issue. Read here about transplant shock:
https://www.extension.purdue.edu/extmedia/bp/bp-31.html

And here about spider mites:
http://www.extension.umn.edu/garden/insects/find/spider-mites/

Keep your receipt. Most reputable nurseries will guarantee their stock for at least a year.