How to Make Window Boxes

LAST UPDATED: Apr 30, 2019 | PUBLISHED: Apr 01, 2013 | By: Julie Blanner

Learn how to make your own planters with this easy step-by-step tutorial to make window boxes that will add color and charm to your home.

Easy DIY window boxes - create your own planters with these simple step by step instructions

This project was truly a family affair, from shopping, to painting and planting. When we purchased our house, we knew the existing window boxes {actually shelves for planters} were victims of wood rot. I was anxious to replace them this Spring to add charm and color to the front of our home.

First, you need to decide how big you want your window flower boxes to be. We built our window boxes 62″ long {just a bit longer than our windows} after assessing the damage the originals left and I love that they are oversized!

Supplies needed to make window flower boxes:


Nail/Staple Gun



Trim {3/4×1-3/4″ accent colonial shown}

Waterproof wood glue

Sand paper




Weed barrier


How to make window boxes:

Using a nail/staple gun adhere 5 boards together. Use clamps to hold them in place if needed.

Use screws to ensure they are secure.

Add trim to accent at the top, bottom or both.

Clamp it to the window box and use a nail gun to adhere it.

Use waterproof wood glue to give it a perfect finish along the seams before sanding {for an even edge}.

Prime your wood boxes inside and out to reduce wood rot before painting.

Drill drainage holes throughout the box.

Staple weed barrier over holes to keep soil from draining through.


Tips to fill planter boxes:

  • Use aluminum soda cans or to pine cones to fill the bottom of planter boxes without adding a lot of weight.
  • Use potting soil, which is much lighter and includes fertilizer for plants versus top soil.

Finally, we added and edible garden! Begonias, carnations, chrysanthemums, clover, day lilies, lavender, lilacs, pansies, peonies, impatiens, and tulip {petals} are some of my favorites. For early Spring, I knew I could rely on pansies and lavender, not to mention that the colors will compliment our home and landscaping plans well. As you may already know, I love lavender for it’s beautiful aesthetic, fragrance and versatility. Click here for some of my favorite lavender uses. Pansies are great for garnishes and salads. The height of the lavender balances the pansies.

How to make window boxes, adding character to your home
add charm to your home with DIY wood window boxes
How to make window planters
how to make window boxes
Completing this project has me excited to get started on the rest of our landscaping!

DIY window boxes

window boxes
You can see our “completed” home here.