Location is Northern New Jersey.
I'm looking to build a low garden wall; approx. 18 inches high. Current plan is cinder block faced with thin brick and capped with real brick.
It isn't a true retaining wall as the grade is flat and behind it will be a garden bed (inspiration below).
Does something like this require a true footing below frost?
Or: Can it be built on grade similar to a paver driveway/patio.