Thuja Green Giant Evergreen

Asked August 29, 2018, 12:18 PM EDT

Please see attachment. Some of my Thuja green giant evergreens are splitting toward the bottom of the trunk. Do you know what is causing this? What can I do to alleviate this issue and hopefully save the trees? Should I spray it with pruning spray or tape? The trees were planted in March 2016 and were about 3 ft high at the time of planting. I appreciate any info you can provide. Thanks.

Sussex County Delaware trees and shrubs tree health split trunk thuja trees

1 Response

Hi. Thank you for your question. I am not sure why the trunks are cracking - there can be multiple reasons. (possibly the excessive rain received earlier in the season) We do not recommend spraying a sealant, etc. on it. I have provided a fact sheet that explains various reasons for bark splitting to occur and how you can trim the area and allow it to "heal"/callus around the area. Good luck! Tracy

http://plantclinic.cornell.edu/factsheets/barksplitting.pdf