Hello,

Extension Responders do not recommend using home remedies for weed or pest control. This is because the final outcome is not known, such as your question; will the mixture have a detrimental effect on the roots of the juniper? This is quite possible since vinegar is a non-specific herbicide, meaning that it could kill any plant that it sprays.

Read more here: https://www.montana.edu/extension/invasiveplants/extension/monthly-weed-posts/2021-june-does-vinegar-kill-weeds.html

And here: https://extension.psu.edu/are-home-remedies-a-good-solution-penn-state-extension-says-no

Commercial herbicides are approved by the EPA for removal of specific weeds and cannot be used for unlisted plants (off-label). It is therefore guaranteed to be used as directed on the label.

Thank you for contacting Ask Extension.