Pipe borders. Using bag with dark green icing and coupler, switch to tip 12. Pipe small icing mound on bottom of cake. Position ranunculus succulent. Repeat on top of cake. Position stacked petal succulents on bottom and top of cake, using icing to attach if needed.
Switch to tip 352. Pipe circle of pull-out leaves on either side of ranunculus. Fill in circle. Repeat as desired on top and bottom border.
Switch to tip 32. Pipe cacti on top and bottom border using pull-out star technique.
Switch to tip 16. Fill in any remaining space on top and bottom border with small pull-out stars and stars.
Switch to tip 2. Pipe small dots to form vines.
Switch to tip 352. Fill in any remaining space on top and bottom borders with leaves.