"In determining the amount of a casualty loss from damage to personal-use residential property, trees and other landscaping are considered part of the entire residential property, and are not valued separately or assigned a separate basis, even if purchased separately.
To compute your casualty loss:
For residential property, damaged and destroyed trees and other landscaping may adversely affect the fair market value of the entire property by reducing the curb or overall appeal of the property. You can refer to the following IRS web page for more information in determining the decrease in value of your property due to damage from a landscaping loss.
Accountant
25+ years tax consulting. Specializing in returns for US citizens living abroad