DIY Concrete Flower Container

Concrete can stand up to the elements and is the perfect choice for outdoor flower planters. If you want to make unique flower pots, do it yourself with concrete and a few simple supplies. Follow these instructions to make a concrete flower planter of your own.

What You Need

  • 2 Cardboard Boxes
  • Duct Tape
  • Concrete Mix
  • 5-gallon Bucket
  • Small Shovel or Trowel
  • Particle Mask
  • Rubber Gloves
  • Sanding Pads
  • Concrete Sealer
  • Paints or Ephemera
  • Marker

What To Do

1. The first step is to select the right boxes. You need two boxes of a similar shape. The second box needs to fit inside of the first with an inch of space around all sides, because this is where the concrete will be poured.

2. Prepare the boxes with duct tape. Remove the top flaps of both boxes. Line the inside of the larger box with duct tape, covering all surfaces completely. Cover the top edges with duct tape. Take the smaller box and cover the outside, including the bottom, and top edges with duct tape. Make sure that no cardboard shows. This ensures that the moisture from the concrete does not seep into the cardboard.

3. Mark a line around the smaller box, one inch below the top edge.

4. If you want to add marbles, small glass tiles, leaves, or any other ephemera to the outside of your planter, attach them to the inside of the larger box with spray adhesive. They will adhere to the concrete as it dries.

5. Mix the concrete in a bucket according to manufacturer's instructions.

6. Fill the large box half full of concrete.

7. Push the small box into the large box. Put weights or other heavy objects into the small box to help press it down. Continue to push the smaller box down until the line you marked around its outside is even with the top of the larger box.

8. Tap the outside of the larger box to remove air bubbles.

9. Pour concrete into the gap between the two boxes until it is even with the top of the outside box. Continue to tap on the outside of the large box as you pour to remove air bubbles.

10. Cover the boxes with a piece of plastic to keep humidity at consistent levels. Let the boxes sit to cure for four days.

11. When the concrete is dry, life the small box out of the center. Remove the outside box; you may find it easier to carefully cut the box with a utility knife and peel it away from the concrete.

12. Paint your new planter if you wish. Seal it with concrete sealer and let it dry.

It is that easy to create a beautiful concrete planter. Keep in mind that the larger your boxes, the larger the planter, and the more it will weigh. This can be important if you are not able to lift or move heavy objects. If you enjoy making this planter, experiment with different sized boxes to create a unique flower pots for your  container garden.