Of course, each planter set comes with a two-sided black marker.
Apart from that, the plastic signs can also be designed with all pens and colors that are suitable as permanent markers or for plastic surfaces.
Our wooden signs are completely untreated. So here you can try the most different colors that can be used on wooden surfaces - we have also seen great variants where our wooden plugs were painted completely colorful, for each plant a different color. There are no limits to your imagination. :)