Garden boxes are typically constructed of 6×6 treated or cedar timbers, double stacked approx 11” to 12” tall, spiked together and rebarred to ground for stability. Then filled with top quality mix soil.
Masonry type boxes are built from 4” choprock with either running bond (brick look) or mixed pattern rocks. Mortared on a reinforced concrete footer, different heights, shapes and sizes upon design specifications.