How to Make Lightweight Concrete Planters

Make the cement mixture in a bin using one gallon peat, one gallon "Portland" cement, and one gallon perlite. Wear a mask to avoid breathing dust and use gloves when mixing, as concrete can burn the hands.

Slowly add approximately 2 1/2 quarts of water as if you were making dough, being sure to add the last part of water slowly. Humidity can affect how much water you need. The mixture should clump in your fist and hold its shape.

Transfer the mixture to a smaller bin. Use any container to shape. If you use metal, oil the interior to prevent binding. Next, shape the mixture into the bin. To avoid suction, use a flexible container. Pack it very tightly to the bottom and sides.

Place a lid on the bin to prevent the mixture from drying unevenly, which affects curing. Then, place it in plastic bag.

Leave the mixture in the bin for two to three days to dry.

Remove the planter from the bin by turning it upside down, being careful not to drop it. Dust loose concrete from the top edges.

Let this air dry for another week.

To create optional drainage, we recommend drilling holes in the bottom.

Finally, fill the planter with shallow-rooting arrangement.