DIY Window Plant Shelf

I added a simple DIY window plant shelf in the window seat in our dining room. It’s the perfect spot to bring my plants in for the winter! Read on to see how to make your own.

This post is sponsored by DAP.

One of the (many) things that made me fall in love with this house was the giant window with a deep windowsill in our dining room. I knew we’d use it all the time, and we do! The kids love to sit there to eat dinner, I use it regularly when I’m working on big puzzles, and it’s so nice to have it as extra seating when we have family over.

Plus, who doesn’t love a huge window seat?!

I realized pretty quickly after moving in that the window wasn’t just a good seat – it’s a really great spot for plants! It’s a south-facing window so it gets really great sunlight all day long. Plus, the deep ledge makes it pretty perfect for tons of plants.

I didn’t want to have to choose if we’d use it as a bench or as a place for plants. So, I started doing some looking around for options that would allow us to do both. I never found exactly what I was looking for done anywhere else, but I did see a few beautiful options where people had installed some sort of window shelves to display plants. I knew it would be the perfect solution here.

We’re only a month or so away from cold weather and the need to bring a few of my outdoor plants inside. This is the perfect ledge for them to live until the weather warms back up! Plants like succulents and tropical plants can’t hang in the cold, so it’s a good idea to bring them inside. It’s also a great spot for your herb garden, if you normally keep it outside!

Keep in mind that if you decide to try a project like this, you’ll have to remove the blinds from your window. So, only do it in a window that has a fair amount of privacy! We created our window plant shelf in one of the largest windows in our house, but you could do it in a small window to create a little indoor garden area too!

This is one of those projects that’s really straightforward and simple. It just took a couple of Grant’s nap times to get it put together and finished!. The key to making it look like it’s always been in your home, though, is found in the details. Using things like caulk and wood filler prior to painting will make all the difference in how your finished product looks. I often get asked what my go-to brand is for all these products you need to finish off a project and make it look clean and gorgeous before you paint or stain, and DAP has long been my very favorite!

For this project, I used:

• DynaGrip HD Max Construction Adhesive
• DynaFlex Ulta Caulk
• Premium Wood Filler

Here’s how we did it!

DIY Window plant shelf

Materials needed:

*Note: Every window will have different measurements for both the length and depth. You’ll need to measure for your specific space and adjust accordingly!

• 2×2 pine boards (The amount will vary depending on the size of your window, measure first!)
• (1) 1×12 pine board
• (1) 1×4 pine board
• (1) sheet (or half-sheet if your window is small enough) of 1/4″ plywood
• DynaGrip HD Max Construction Adhesive
• DynaFlex Ulta Caulk
• Premium Wood Filler
• Paint

Step one: Build the interior supports

You’ll start by building the skeleton of the shelf. This will act as the support and won’t be visible once the shelf is complete. This step is vital to make sure the shelf can hold the weight of the plants. Use the 2×2 piece of wood to assemble a frame that fits the interior measurements of your window. The length should be exactly the length of the inside of your window. The depth should be the depth of the window minus 3/4″. This is to allow for the board you’ll be adding on top.

To assemble the framing, use DAP DynaGrip HD Max and screws (that way you know it’s not coming apart!). Be sure to pre-drill holes for your screws prior to adding the construction adhesive.

Start with the two long pieces, then add a short piece on either end. Once the outside frame is complete, add cross pieces approximately every 16″.

When it’s done, it should look something like this:

Note that nothing is being attached to the window frame itself. You wouldn’t want to mess with the actual window and cause issues!

As you’re installing this, be sure to pay attention to the height you’re hanging it at – if you have a lot of taller plants, you’ll want to hang it a little lower.

Step two: Install the support

Once you’ve got the framing built, you’re ready to install it in your window well! Find the studs in your wall (usually on either corner). Then, pre-drill holes in the sides of the support, and drill it into place.

STEP THREE: cover the support

Now comes the part where it all comes together!

Take your 1×12 board and cut it down widthwise to fit the depth of your window well. Then, cut the length down so that it fits perfectly in the window.

Add some of the DAP DynaGrip to the top of the framing. Then, place the board on top, and nail it into place. Repeat the process with the 1/4″ plywood on the bottom, and then once more with the 1×4 board on the front of the shelf.

STEP FOUR: Caulk & Patch

Now that the shelf is assembled and installed, it’s time to make it look pretty.

I used DAP Premium Wood Filler to fill all of the seams along all three sides of the board, as well as all of the nail holes. I love this wood filler because the texture makes it very easy to work with and the finished product looks completely seamless. Be sure to overfill it slightly so that when you sand it down, the seams are fully covered!

Allow it to dry according to the package directions, then sand it down so it’s flush.

As far as the caulk, you’ll want to use the DAP DynaFlex Ultra caulk to fill in all of the seams where the shelf meets the walls. I specifically chose this particular caulk because it has really great hold and is water-resistant, so if it gets wet when I’m watering the plants it won’t be a big deal! If caulking makes you nervous, click here for a full, in-depth tutorial on how to use caulk!

STEP FIVE: Paint!

Now you’re ready to paint! For my shelf, I chose to use the exact same paint that is on all of our trim around the house. It helps the shelf feel like it was always a part of our house, and makes it look really cohesive with the trim on the window seat right below it.

Once the paint is dry, you can fill it up!

I LOVE how this little shelf turned out, and I’m thrilled that we can still comfortably use the seat while also displaying all the plants I could possibly want (seriously, this thing can hold a lot!).

I only installed a single window shelf because I wanted to be able to continue to use the window seat. But, if you don’t have a seat like we do you can create tiers and do multiple shelves!

If you’re working with a smaller window, you could probably add brackets on either side of the window and simply set a shelf on top. Alternatively, you could create a hanging window plant shelf by hanging rope from the ceiling, drilling holes into the wood for it to go through, and tying knots underneath.

Of course, if you want to keep it extra simple, you could even just hang some macrame planters from the window well and put some cute small pots in there. It doesn’t solve the problem of bringing plants in for the winter but it sure would look good!

I can’t emphasize enough how big of a difference the right finish makes on a project like this – and I promise, if you haven’t found a favorite caulk/adhesive/wood filler/ALL THINGS finishing brand yet, DAP’s the one for you! You can click here to head to DAP’s website and learn more about the various products they offer, or click any of the links above to shop the exact products I used!