• In this video, This Old House general contractor Tom Silva shows how to properly mount window boxes, and This Old House landscape contractor Roger Cook shares expert planting tips.

    1. Unzip the course of vinyl siding immediately below the window. 2. Pull up on the loosened piece of siding and tap on the wall to locate studs. 3. Drill a 3/16-inch-diameter hole into the wall to confirm the stud location. 4. Use a pencil to transfer the stud location onto the window. 5. Reattach the siding using a zip tool. 6. Hold the window box into position centered under the window. 7. Transfer the stud-location mark from the window onto the window box. 8. On the stud-location mark, drill a 3/16-inch-diameter reference hole through the inside rear of window box and into siding. Repeat at each end of box. 9. At each of the three reference holes, drill a 5/8-inch-diameter hole through the vinyl siding. 10. Next, drill a ΒΌ-inch-diameter screw hole through each 5/8-inch-diameter hole and into the studs. 11. Fill each screw hole with siliconized caulk. 12. Fasten the window box to the house with three 5/16-inch-diamter x 4 inch-long galvanized lag screws. 13. Glue the two decorative brackets to the underside of the window box using PVC cement. 14. Line bottom of window box with landscape fabric, then add 1 inch of washed stone. 15. Place self-water reservoir inside of window box. 16. Fill window box with potting soil and add an assortment of annuals and perennials. 17. Add liquid fertilizer to watering can and thoroughly water all the plants.
    • Difficulty: Moderate
      Requires basic carpentry and gardening skills
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      Video Directory

      Selected Topic/Section

      Tools List

      • drill
      • zip tool
        Zip tool
      • right-angle drill
        Right-angle drill
      • caulk gun
        Caulk gun
      • ratchet wrench
        Ratchet wrench

      Shopping List

      Cellular PVC window box

      Siliconized caulk

      5/16-inch-diamter x 4 inch-long galvanized lag screws and washers

      PVC cement

      Assorted annuals and perennials

      Landscape fabric

      Washed stone

      Potting soil

      Liquid fertilizer