[header] How to make plant markers from broken pots [title] Identify an area in your garden where pot plant markers will be effective. [step] This will help you to gain an idea of how many markers to make. Typically you'll need a bit of space so you can surround the planted greenery with the pot, however you could trim a potted plant in a smaller garden using a smaller size. 
[title] Measure the area around the specific plant. [step] A tape measure is handy but even eyeballing the area to determine the pot size will work well too.