Personalize your garden with greenology’s Chalkboard Garden Stakes. Reusable, these ingenious stakes are simple, rather rustic, and stylish, so they add character as well as information. They can be used to create personalized signs, too, for your walkway or garden. Just use markers for a lasting communiquÃ© or chalk to redo over and over. greenology’s Chalkboard Garden Stakes measure 4.75 x 15.