Go to the Design menu > Solid Element Operations to open the SEO palette. Select the wall indicated on the attached graphic and hit the "Get Operator Elements" button on the palette. Select the planting material and hit the "Get Target Elements" button. Choose "Subtraction with upwards extrusion" and hit "Execute."
MacBook Pro Apple M2 Max, 96 GB of RAM
AC27 US (5003) on Mac OS Ventura 13.6.2
Started on AC4.0 in 91/92/93; full-time user since AC8.1 in 2004