How to Plant Flowers in Window Boxes

6 Materials
15 Minutes

(This post was written in collaboration with H Potter but all thoughts and opinions are my own.) Are you looking for planting ideas for a window box? Wait until you see how to plant flowers in these GORGEOUS window boxes.

When I first saw these stainless steel window boxes with an antique copper finish, it was love at first sight.

I mean…wow!

And I have to tell you, they are even more beautiful in person than they are online.

About H Potter

H Potter sells absolutely gorgeous garden decor and accessories. I’ve received a few items from them, and these copper window boxes might be my favorite because they added lots of character to my garden shed.

H Potter is a family-owned business that has been accenting homes and gardens nationwide for over 20 years with distinctive items that can be used indoors and out.

Their product line includes terrariums, lanterns, trellises, window boxes, planters, and torches, handmade by artisans using high-quality materials from stainless steel to copper to hand-blown glass.

And let me tell you, from my experience, they are built to last and are just gorgeous!

How to Plant Flowers in a Window Box

Today, we are planting these beautiful window boxes that are even more gorgeous in person.

These planters were easy to assemble and very well made.

I potted them up with some pretty spring flowers that would accentuate the beauty of the copper planters and add cottage charm to my garden shed.

Before the window boxes were planted

Supplies Needed to Plant in a Window Box

  • plants
  • container
  • potting soil
  • weed fabric
  • gloves
  • scissors
  • plant food
  • shovel or cup

For this project, the plants I chose are:

  • Geraniums
  • Sweet Potato Vine
  • Bacopa
  • Euphorbia
  • Vinca
When I shop for annuals, I don’t mess around. I bring the big truck!

Determine Location

The first step is to determine where the window boxes will be maintained. Does the area receive full sun, part sun, or shade?

Understanding the location will help you choose the right plants.

Choose Flowers for the Window Boxes

Once the location is determined, it’s time to shop for plants.

If choosing to create a container design with a few plants, it’s important to make sure that they each have the same or similar light conditions as well as water conditions.

So read the plant tags.

Understanding light and water conditions will help you take better care of your plants after the container garden is finished.

How to Design a Window Box Garden

While shopping around the nursery, I was looking for plants that would accentuate the planters and could handle lower light conditions.

One of the things I like to do is group my plants together in the nursery to see how they look together.

Are they aesthetically pleasing?

I look at foliage, blooms, plant size, and the overall plant habit.

Because when designing a container garden, it’s important to use the thriller, filler and spiller method of design.

Planting the window boxes

How to Plant Flowers in a Window Box

  • Gather supplies.
  • If possible, remove the window box and work from a table. In many cases, this isn’t possible, and that’s OK. But it is much easier to pot them on a table if you can.
  • Cut weed fabric to size to fit inside the planter.
  • Add some potting soil with a hand trowel or cup so the plants have some soil to sit in.
  • Check the planting depth by adding your plants while still in their plastic nursery pots. You want the soil line to match up with about an inch down from the top of the container. If more soil is needed to get the right depth, add more.
  • Remove plants from plastic pots and fan out the roots before setting in the container. This encourages the roots to grow out into the potting soil.
  • Back fill with potting soil, tamping it down as you go to remove the air pockets.
  • Add a slow-release fertilizer to the container, water, and enjoy!

And that’s it!

Didn’t they turn out beautiful?

After planting.

Window Box Care Tip

It’s important to note that window boxes can dry out much easier than larger planters.

Unless you add an irrigation system like this one, you may need to water your window boxes 1-2x a day in the heat of summer.

Keep an eye on your plants to make sure they do not wilt.

For more container garden care tips, CLICK HERE.

And if you are looking for more gardening tips, tricks and inspiration, CLICK HERE.

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Enjoy your day! xoxo

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Resources for this project:
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Stacy Ling | Bricks 'n Blooms
Want more details about this and other DIY projects? Check out my blog post!
Frequently asked questions
Have a question about this project?
3 of 5 questions
  • Robyn Garner Robyn Garner on May 31, 2021

    Your gardens are gorgeous! Why add the landscape fabric to the pot? Was this just to keep soil from draining out the bottom holes?

    btw - I block my drainage holes just with a cut scrap of window screening. Much less expensive than landscape fabric.

  • Andrea Andrea on Jun 26, 2021

    I’ve never had a window box before so I don’t know how they attach to the house. I see it has a holder but how is that holder attached to house? I’m going to try this in my front window. So beautiful

  • Ally Ally on May 27, 2023

    Where did you get the window boxes with that nice trim?

Join the conversation
2 of 9 comments
  • Dl.5660408 Dl.5660408 on May 31, 2022

    Beautiful! As is your entire yard; I could swoon 😻😻😻

  • Julie Julie on Mar 21, 2023

    Beautiful! Watch out for homeowners insurance. When we switched insurance companies, the person they sent out told us we had to remove window boxes and dig up all of our foundation plants. We had to replant and make sure the plants were 24 inches from the house!