The plants are signs of an unobtrusive, medium-gray plastic and quite thin. In freshly raked, turned earth can they without problems plugging in dry, non-turned earth, it is a little more difficult, because the lower bend parts that come into the earth, very fast to.
The white plates are very smooth and are best labeled with waterproof Edding. Pencil does not go, pen is not so great, and ink blurred and does not dry. The signs are large enough that you can comfortably and readable even longer words, such as basil draufschreiben.
The removal of the tag from the plant plug goes well and without leaving a residue.
For the garden, I find the signs actually too bad. I like them better in a colorful spice planter on the balcony as they come then very good effect. And look much prettier than the small Pappschildchen that come in seed packets.