Arborvitae Shrubs keep dying
I have planted 10 arborvitae shrubs as a barrier between our neighbors in the back yard and they have died. This is the second round of shrubs that I've planted which have died. They were planted where buckthorn previously grew which I removed by the roots. Buckthorn still exists about 10 feet away on both ends of the line of arborvitae. Could the closeness of the buckthorn to the new arborvitae be what's killing them or is there something remaining in the soil? Is there a better and heartier shrub that I should be planting as a privacy barrier? Thank you.
Hennepin County Minnesota
Arborvitae are very tough trees. They do , however, need an inch of water each week either from rain or the hose and they need water until the ground freezes in the fall. This means watering until about mid Nov. They also require soil that drains well. They are not going to thrive in soggy soil. Buckthorn can affect seeds and seedlings negatively but it does not
seem to affect larger trees and shrubs.