Make cement flowerpots, also called a hypertufa planting containers, with supplies found at most hardware stores. The finished pots add a rustic look to flower gardens when planted with miniature or trailing plants. Prepare all supplies prior to mixing the cement to prevent it from hardening before placing it in the flowerpot mold. Work in a ventilated area that has plenty of room, as this project can be messy.
Make a mold for the flower pot by finding a cardboard box for the exterior dimensions of the pot and another box for the interior hole dimensions of the pot. Find an interior box that creates at least a one-inch gap between the two boxes when placed inside the large box.
Lay down a drop cloth. Prepare the cement mixture by measuring two parts Portland cement with three parts peat moss and three parts perlite in a large plastic tub.
Mix the dry ingredients thoroughly. Add water to the dry ingredients and mix with your hands until it forms the consistency and texture of cottage cheese.
Cut a piece of 3/4-inch wire mesh that is one inch in diameter smaller that the size of the bottom of the large cardboard box. Pour one inch of the cement mixture into the bottom of the large box, and set the wire mesh on top. Pour another one inch of cement into the box, and smooth the surface with a mason’s trowel.
Poke four to five pieces of four-inch-long wooden dowel through the cement to create drainage holes. Remove the dowels once the flowerpot is completely dry.
Fold over the top flaps to the inside of the smaller box, and tape them to hold in place. Set the smaller box inside the large box so the top opening is facing down on top of the bottom cement.
Cut pieces of 3/4 inch wire mesh slightly smaller than the dimensions of each side of the large box. Fit the pieces in the space between the exterior and interior cardboard boxes to provide structural support to the sides of the flowerpot.
Scoop the cement mixture into the sides of the cardboard box form with a mason’s trowel. Push the cement mixture into the form with a stick to prevent air pockets. Smooth the top edge of the flowerpot with a mason’s trowel.
Cover the cardboard box with piece of plastic for 24 hours or until the cement is set. Set the cardboard in a dry area for four to six weeks to give the flowerpot time to cure.
Remove the cardboard boxes and wooden dowels from the flowerpot. Repair cracks by smoothing cement over the damaged area and letting it dry for two to three days.