Column planters are stately additions to any room. Place two on either side of a doorway or one in a corner to draw attention to the space. Column planters are typically at least 24 inches tall and may be cylindrical, square or rectangular. Many column planters are wide at the top, gradually tapering to the floor. You can build an indoor column planter from wood, then decorate it to suit your home's décor.
Measure, mark and cut two 1/2 inch thick plywood panels equal to the desired shape, height and width of the column planter. These are the A panels. Measure, mark and cut two 1/2 inch thick plywood panels equal to the first two, with 1 inch added to the overall width. These are the B panels. The added dimensions are to cover the thickness of the first two panels.
Place an A panel flat on a work surface. Abut a B panel perpendicular to one of the longest edges of the A panel. The ends of both panels should be flush. Insert 1-inch decking screws every 2 inches along the length of the B panel, straight into the edge of the A panel.
Attach the second B panel to the opposite side of the A panel. Make sure that the ends of the panels are flush before inserting the screws every 2 inches along the edge.
Rest the remaining A panel on top of the two B panels. Make sure that the edges are flush on both sides. Insert 1-inch decking screws along both edges of the A panel to connect it to the B panels.
Measure the bottom of the four-sided structure from inside edge to inside edge to determine the width and length of the bottom section of the planter. Measure, mark and cut a 1/2 inch thick plywood sheet to fit the dimensions.
Place the bottom panel on a flat work surface. Fit the four-sided structure over the bottom panel. Make sure that the bottom edges of the four sides are flush against the work surface. Attach the four sides to the bottom panel by inserting 1-inch decking screws around the bottom perimeter of the wood structure.
Flip the planter upside down and drill drainage holes into the bottom panel. Place the holes 3 to 4 inches apart. Four holes should be sufficient.
Cut a section of plastic sheeting to fit inside the column planter. Even though you are building an inside planter, the inside of the wood should be protected. Line the inside of the planter with the plastic. Attach the liner to the wood with a staple gun around the top perimeter. Puncture holes in the plastic to coincide with the drilled drainage holes.