Cast concrete planters

How to make it

1. 

   1

   Prep the molds

   Spray the inside of the big container and the outside of the small one. Glue a cork to the center of the big one's bottom for the drain hole.

2. 

   2

   Mix the concrete

   Add water slowly and mix until it's like thick brownie batter. Too wet makes weak pots.

3. 

   3

   Fill the bottom

   Pour about 1 in of concrete into the big container, around the cork.

4. 

   4

   Set the inner mold

   Press the small container in and weigh it down with rocks. Fill the gap around it to the top.

5. 

   5

   Tap out the bubbles

   Tap the sides for 1 minute. You'll see bubbles rise. Fewer bubbles, fewer holes.

6. 

   6

   Wait and unmold

   Cover with a plastic bag for 24 to 48 hours. Twist out the inner mold and pull off the outer one.

7. 

   7

   Cure and rinse

   Keep it damp under plastic for 2 more days. Sand the rim and soak it in water overnight before planting.