How to Install Window Box Planters

Written by tanya khan
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How to Install Window Box Planters
Install a window box planter under your window frame. (Kim Carson/Photodisc/Getty Images)

A window box planter filled with tall or trailing plants adds a welcoming touch to the house and brightens the walls with natural colour. This inexpensive window treatment provides attractive views for the occupants as well as neighbours and passersby. Instead of placing a planter over the ground, mount it directly under the exterior window frame to enhance the mood and provide natural aromatherapy. Grow herbs for an endless supply through the season or flowers, such as tuberous begonias, geraniums, impatiens and zinnias, to attract butterflies and hummingbirds.

Skill level:

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Things you need

  • Stud finder
  • Pencil
  • Tape measure
  • Carpenter's level
  • Drilling machine and drill bit
  • Three 3/8-inch-wide, 4-inch-long lag bolts
  • Three 2-inch washers

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  1. 1

    Run the magnetic or electronic stud finder over the wall under the window frame to locate wall studs. Studs are usually located on each side of the window and the middle. Every time the stud finder signals a location, mark it on the wall with a pencil.

  2. 2

    Measure the distance from the left lower corner of the window sill to the right. Divide the distance by two to determine the window's centre. Mark this centre point on the wall below the window or on its frame with a pencil.

  3. 3

    Measure the width of the box planter you want to mount and locate its centre. Mark the centre point on the upper edge of its back with a pencil.

  4. 4

    Position the planter under the window so the spot on its back that determines its centre rests directly over the centre mark of the window. The point where both centre marks overlap is where you will hang the planter. Mark a spot on each corner of the box planter that corresponds to the corner stud marks on the wall. The planter now has three spots over it through which you will drill pilot holes -- one on each upper corner and one over the middle. Put the planter down.

  5. 5

    Join the stud marks on the wall and the middle mark with a horizontal line. Use a carpenter's level to make sure the line is even and straight to prevent the planter tilting to one side after mounting.

  6. 6

    Drill three pilot holes in a row through the marks on the upper back of the planter.

  7. 7

    Lift the planter against the marks on the wall so its centre rests directly over the centre mark of the window sill. Insert a pencil through each hole on the corner of the planter and mark the spot on the wall where the pencil tip rests to determine the location of pilot holes. These two corner marks should rest over the stud marks on the wall. Put the planter down and drill a pilot hole through each mark on the wall.

  8. 8

    Lift the planter up against the wall again, with its holes positioned directly against the holes on the wall. Insert a 3/8-inch lag bolt and 2-inch washer through each hole that penetrates the wall. Tighten each bolt with a wrench so it supports the planter and weight of the soil and plants securely.

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