Protecting Tree in Street

To my great delight, the city has planted a new tree in the sidewalk outside my house, presumably in response to a request I posted on their web site last year. The tree looks fantastic but the tree bed (is that what it’s called?) has nothing around it to keep the soil in place, and it is already spilling out onto the sidewalk. I would love to put some plants in the soil and generally keep it looking nice but I don’t think I will succeed unless the soil is surrounded by bricks, cobbles or a little fence to keep everything in place (and to keep dogs out). Does anyone know if the city provides this, or if I should go to Home Depot this weekend and buy something to get the job done?

By kk634000 |