If your sign is on posts, and is expected to be in that location longer than a couple of years, then we recommend using redwood posts. This will extend the life expectancy of your posts greatly. Metal posts and poles are a better choice for longevity of a sign, but are a more expensive option.
Before installing your sign you must also be aware of any sprinkler systems or utility pipes running through the ground. A service that we offer is to USA the dig location for you. Know what’s in the ground before you dig!