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Step 8: Pouring the Concrete

Picture of Pouring the Concrete
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In the next step fill about 2/3 of your outer mold with concrete. Afterward, insert the inner mold.

Fill the mold until the concrete level reaches the lower edge of the wooden pentagon. Tap the mold a few times to remove any air bubbles that might be trapped inside.
You might need to add some sand/stones to your inner mold to keep it at the right height. Also, make sure that the edges of the inner and outer mold are approximately parallel.

This part might require a bit of fiddling to get right. If I would make the planters again, I think I would redesign the wooden hexagon to hold also the inner mold in place. This would make things considerably easier at this step.

Almost finished! Now you can sit back and relax while your planter dries.