Homegrown Stone Pots

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Step 9: Insert dowel rods for drainage.
If the container is to be used as a planter, insert wooden dowels into the bottom for drainage holes and press firmly. If you skip this part, you can drill holes into the bottom of the planter later, using a ceramic drill bit.

Place the trough in a sheltered place for about 48 hours before unmolding. Cover with plastic to retain moisture. The more slowly the concrete hardens, the stronger the finished trough will be.