||Easiest material to work with; fits well esthetically into any environment.
||Treated wood can contain chemicals that can damage plants; can be expensive; tends to rot.
||Blends well into most environments; large selection available
||May need contractor to construct wall due to weight and skill needed; usually permanent; can be abrasive.
||Very adaptable; can be pre-molded or poured on site; colors and textures can be blended well into urban environments.
||Must have appropriate foundation; pouring may require a contractor; can be abrasive.
||Relatively easy to work with; cheap; holes are adaptable as planters.
||Not very appealing esthetically; large and bulky; soil dries rapidly and requires frequent watering.
||Can be most esthetically pleasing of all materials; available in variety of colors.
||Brick-layer may be needed to construct bed; expensive; tend to be permanent.
||Cheap; possibly free.
||Can be abrasive; safety issues.
||Very attractive; can be inexpensive; smooth surfaces tend to be less abrasive
||Tends to be very heavy.