I have made these labels to go with the sel watering plant pots that were a feature item a few weeks ago. The labels are designed in Onshape, the document can be found and copied here: https://cad.onshape.com/documents/9b1f3d771fb6876df775d98b/w/e85667591720de54853f907e/e/280033a432509c393b23da40

Print in two contrasting colors for background and raised text and outline.