Wood is an excellent material for container gardens because it
lets the plant roots breathe and it is relatively light weight.
You can also make your own containers to whatever size you like.
The wood will deteriorate after several years, however, so
wooden planters are best used for shorter lived plants rather
than trees or shrubs which you will keep planted for many years.
Making your planter from redwood or cedar will make it longer
lived, as these woods resist insects and wood rot. Here are
instructions for making a 12 x 12 x 12 inch planter. It can be
easily modified to make whatever size planter you like: some
suggestions for making larger or smaller planters are included
at the end of this article. Wood saw (hand or power) note some
hardware/lumber stores will cut wood for you for a small fee
Drill and 1/2 to 3/4 drill bit T or L square (for making sure
your corners are square and sides straight) Miter box (for
making straight cuts) Workbench with vise or clamp (to hold wood
as you cut or join together