Why Evergreens Often Can't Pull Water From Frozen Ground - What You Need to Know and Do
https://blast-wiki.win/index.php/How_a_$15_Soil_Test_from_the_Extension_Office_Lets_Your_Boxwoods_Reach_Four_Feet_Wide
1) The blunt reason your evergreen looks thirsty in winter: frozen soil blocks water uptake Want the short version? When the soil around roots freezes, most trees and shrubs simply cannot access liquid water