Vertical gardens are a great way to green up walls and fences.. The vertical gardens are designed by horticulturist Gayle Zimmerman plant box measures 11.5 X 11.5 x 2-inches- kit includes 10 Hens, Chicks succulents, and20 Sedums. Instructions included. Vertical gardens make a great gift for garden friends, apartment dwellers, new brides, gardeners in urban environments or for your garden self. Hang on on the patio, the balcony, in view of the kitchen sink, in your outdoor entry.