How to Attach Supports to a Masonry Wall
While espalier shoots can be tied directly to wood lattice, creating a support system on a brick, block, or stone wall requires a little work up front. First, use chalk to sketch the pattern you want for the espaliered tree or shrub directly onto the masonry surface. This will help you figure out where to place the supports. Then, using a masonry bit, drill holes on the pattern lines every 18 inches or so. These are for 2-inch expansion shields, which will anchor eyebolts into the masonry. Clean out the holes, insert the shields, and screw in eyebolts that are long enough to create a 4- to 6-inch air space between the eyes and the masonry. Finally, secure 12- or 14-gauge wire between the eyebolts for tethering the espalier's branches.