I planted some of thesein a pot on my table that did not grow ..
Thought you all might like this , last year I offered these
Last years self sow from the Petunia pot , growing from a crack in the Driveway ..
Brings to mind planting instructions like : Set cement stones in square or circle , or a cement round with a hole in middle ,set in suniest place possible sow seeds just under edge of concrete or cement ,