How to Make Window Boxes

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. These DIY boxes are simple to make and even simpler to fill with beautiful blooms!

Simple Window Boxes

When we originally purchased our house, we knew the existing window boxes (actually shelves for planters) were victims of wood rot. I’ve been anxious to replace them, since I knew they would add so much charm and color to the front of our home. I’m already dreaming of ways to fill them for each season!

I like to give a lot of detail in my how-to posts to guide readers through any questions. If you’re just here for the printable how-to guide, feel free to click “jump to how-to” right under the title of this post and you’ll head straight there!

These window boxes are a simple DIY project that you can do in a weekend. Chris and I picked up the supplies one night and got to work immediately the next day.

While window boxes are usually the same length as the window they are hanging below, ours will be 6″ larger on each side to conceal damage that the existing ones will leave.

How to Make DIY Window Boxes

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. This ended up being a blessing in disguise, because I actually love how they look.

Supplies Needed

• Wood (We used Pine but Cedar is ideal)
• Nail/Staple Gun
• Clamps
• Exterior wood screws
• Trim (3/4×1-3/4″ accent colonial shown)
• Waterproof wood glue
• Sand paper
• Primer
• Paint
• Drill
• Weed barrier

Instructions

Tips to Fill Planter Boxes

• Use empty aluminum soda cans or 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.

Planting Window Boxes

For these window boxes, I chose to add an edible garden. Some of my favorite edible flowers include begonias, carnations, chrysanthemums, clover, day lilies, lavender, lilacs, pansies, peonies, impatiens, and tulip {petals}.

Since I was planting in early spring, I knew I could rely on pansies and lavender, knowing that the colors would compliment our home and landscaping plans well.

As you may already know, I love lavender for its beautiful aesthetic, fragrance and versatility. Click here for some of my favorite lavender uses. I chose pansies because they are great for garnishes and salads, plus the height of the lavender balances the pansies.

For ideas of what to plant in your new window boxes, check out English Lavender and French Lavender – you can see French in ours!

Free Garden Printables

• The Garden Journal – designed to keep record of what you have planted, whether it requires sun or shade, water requirements, the height it will reach, when it will bloom & care it requires
• Garden Guide – a sketch of what you have planted that correlates with your journal
• Garden Plans – a place to sketch your overall design
• Notes – detailed care, changes you may want to make in the future, etc

Now that we’ve completed this project, I’m excited to get started on the rest of our landscaping!

You can see our “completed” home here.

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More Garden Inspiration

• Fiddle Leaf Fig Tree
• Olive Tree
• Our Garden Tour in our St. Louis Home
• How to arrange garden containers
• Lavender Tree
• Indoor wall planters
• Tree Swing
• Learn more about lilac
• Maintenance free garden ideas