Mounting a window box below windows on the front of a home will create a cottage appearance and increase the visual curb appeal when people drive by. Window boxes constructed from wood are more sturdy than plastic and have a longer life span. Place a plastic liner inside the window box to prevent moisture damage from the soil or set small potted inside the window box to make it easy to swap plants in and out during the growing season.
Set the window box 1 inch under slide windows or 8 inches below swing out style windows on the front of your home.
Slide a stud finder along the wall and mark stud locations so you can drill the hanger bolts into the wall studs to provide a sturdy support.
Drill a hole into each top corner of the window box with a 1/2-inch diameter bit. Set the holes 1 inch from the side and top of the window box. Make a hole in the top center if the window box is longer than 30 inches.
Hold the window box in the desired mounting location and use a level to ensure it is straight. Mark the location of each window box hole on the wall, attempting to line the holes up to the wall studs for extra support.
Drill a hole into the wall with a 1/2-inch-diameter bit at the location of each marking. Screw a hanger bolt into the wall hole so 1 1/2 inch protrudes.
Hang the window box on the wall by sliding the hanger bolts through the holes. Secure the window box on the wall by sliding a washer on the hanger bolt followed by a nut so the window box is between the wall and nut. Tighten the nut to hold the window in place.