your best choices for a visual barrier would be evergreen, of course, but you won't get a lot of help from plants for a sound barrier that close to a highway.
do you have to get permission from the county to install plants in this area?
i like southern wax myrtle in a setting like yours. it is not the most dense shrub but is native, grows fast and is wildlife friendly. should be available locally and not expensive. you could stagger rows to get better coverage.
other candidates could be hollies or some of the smaller magnolias but they won't be cheap if you buy plants of any size. |
Here is a link that might be useful: southern wax myrtle
