This plant pot is the simplest project imaginable! Truly over and done with in a half an hour tops (excluding time to cure). Cut a circular piece out of an old jumper. Dip it into a loose concrete mix. Hang it over a small bucket or similar. Wrap in plastic for a few days....hey presto! Oil or wax will water seal your concrete and strengthen the pot.
Transform An Old Jumper Into A Concrete Pot