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!
Table of Contents
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
1. Using a nail/staple gun adhere 5 boards together to form an open-top box. Use clamps to hold them in place if needed.
2. Use screws to ensure they are secure.
3. Clamp accent trim pieces to the top, bottom or both.
4. Use a nail gun to adhere the trim.
5. Use waterproof wood glue to give it a perfect finish along the seams before sanding (for an even edge).
6. Prime the wood boxes inside and out to reduce wood rot before painting.
7. Drill drainage holes throughout the box.
8. Staple weed barrier over holes to keep soil from draining through.
9. Hang!
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.
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
More Garden Inspiration
- Gardening Gift Basket
- Our Garden Tour in our St. Louis Home
- How to arrange garden containers
- DIY Garden markers
- Indoor wall planters
- Learn more about lilac
- Maintenance free garden ideas
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.
Want more? Receive the best ideas directly to your inbox and connect on Youtube, Instagram, Facebook, and Pinterest!
How to Build a Window Box
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!
Materials
- Wood
- Screws
- Trim (3/4×1-3/4″ accent colonial shown)
- Waterproof wood glue
- Sand paper
- Primer
- Paint
- Weed barrier
Tools
- Nail/Staple Gun
- Clamps
- Drill
Instructions
- 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.
- Hang!
Notes
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.
These are perfect! How deep and wide are the boxes?
Unfortunately I can’t recall, Kim and we no longer live there. We made them to custom fit the window, but I think about 1′ deep and maybe 10″ wide. I hope that helps!
a lovely project! and you did it the right way – I plan to make a ‘cover’ for our plastic window boxes with wood trim/molding… but watch me mess it up… keep up the good work Julie!
You’ve got this, Linda! I’m sure they’ll be beautiful!
I love your window box! I am hoping to add one to my home this summer. Thanks for sharing this idea!
Karli, we used tapcon screws and a masonry drill bit.
How did you adhere them to the brick?
I am totally agree with your oppinion.this blog post is very encouraging to people who want to know these topics.
Thanks Angela! Nice to “meet” you!
Oh these are SO perfect. They look great on the house – what a charming idea. I’ve always wondered how to add the accent details- using trim pieces is so smart! I’m also one of the Lowe’s Creative garden gals which is how I found your blog. So great to meet you!
Thanks Sandy! I love the character it added!
ohh wow! i love this DIY~!!
xo,
Sandy
Sandy a la Mode