The 10 Best Flowers for Window Boxes (Plus 3 Easy Planting Recipes)
Window Box Gardening Tips for Full Sun, Shade, and Part Shade
Window boxes are like jewelry for your house. They bring color and life to your home’s exterior, turning ordinary windows into garden displays. They're a great way to boost curb appeal, add fragrance near entryways, and enjoy blooms up close, both from outside and inside your home.
To get started, choose a container with proper drainage holes. Line the bottom with an inch of small stones to prevent soggy soil, then fill with a quality potting mix designed for containers.
Next, observe how much sunlight your window box receives. Is it in full sun (6+ hours daily), part shade, or full shade? Choosing the right flowers for the light conditions is the most important step for long-lasting results.
Getting Started: Soil, Drainage, and Light
Before planting your window box, keep these three essentials in mind:
- Drainage is key. Make sure your window box has adequate drainage holes. Adding a layer of small stones at the bottom helps prevent soggy soil and root rot.
- Use high-quality potting soil. Don’t skimp—choose a light, well-draining mix designed for containers.
- Know your sunlight. Is your window in full sun, shade, or part shade? The amount of daily sunlight your window gets will determine what flowers will grow best.
And here’s a fun design tip: consider the view from both sides, inside your home and out. You can even plant flowers that attract butterflies or hummingbirds to enjoy from the window.
Understanding Sunlight Levels for Window Boxes
Before you start planting, it helps to understand what full sun, part shade, and full shade actually mean. These light levels determine which flowers will grow comfortably and which ones may struggle.
- Full Sun: Receives 6 or more hours of direct sunlight each day. Ideal for sun-loving flowers like zinnias, petunias, and lavender.
- Part Shade: Receives 3 to 6 hours of direct sun, often with shade during the hottest part of the day. Great for impatiens, salvia, and some herbs.
- Full Shade: Receives less than 3 hours of direct sunlight daily, often in north-facing spots or under eaves. Perfect for coleus, begonias, and fuchsias.
Once you’ve identified the light exposure of your window boxes, you can confidently choose plants that will thrive in those conditions.
Best Flowers for Shade Window Boxes
Shaded windows don’t have to mean dull displays. There are lots of vibrant plants that love low-light conditions and will bring beauty and texture to even the darkest corners. These shade-tolerant flowers are ideal for north-facing windows or spots that get very little direct sun during the day.
1 - Coleus
Coleus is all about the foliage. With leaf shapes ranging from delicate to bold, and colors from lime green to nearly black, coleus adds incredible texture and vibrancy, no blooms required. Though they do flower late in the season, it’s the leaves that steal the show.
2 - Impatiens
One of the most reliable choices for shady spots, impatiens form tidy mounds covered in blooms from early summer through fall. Available in pink, purple, white, coral, and more, they’re low-maintenance and don’t require deadheading.
3 - Begonias
Begonias love the shade and bloom continuously through the warm season. Trailing varieties are especially nice in window boxes, where they can spill gently over the edges, softening the look of the container.
4 - Fuchsias
Though often seen in hanging baskets, fuchsias also thrive in window boxes. Their graceful stems and two-tone blooms (in shades of white, pink, and purple) make them a striking choice for a shady window.
Best Flowers for Full Sun Window Boxes
If your window boxes are exposed to strong afternoon light or full sun throughout the day, you’ll want plants that can tolerate heat and look great in dry conditions. These sun-loving flowers will give you big color and bold structure all season long.
5 - Geraniums
A tried-and-true favorite, geraniums are perfect for sunny window boxes. Their thick, upright stems and foliage support large flower heads that bloom reliably with regular watering and feeding. Today’s varieties offer a wide range of reds, pinks, and even bicolors.
6 - Zinnias
Zinnias are easy to grow from seed and come in compact sizes that fit window boxes beautifully. Their cheerful, daisy-like blooms attract pollinators and come in every color imaginable. Plant them from seed directly in the box, or start indoors for earlier blooms.
7 - Salvia
Salvia adds height and color, with upright flower spikes that rise above the foliage. These long-lasting blooms come in shades of red, blue, or purple and are a favorite of hummingbirds and bees.8 - Petunias
Few flowers offer more volume and color than petunias. As they grow, they’ll cascade over the edge of your window box, creating a full, flower-heavy display. Choose trailing varieties in your favorite shades, from bright white to deep purple.
Best Herbs to Grow in Window Boxes
9 - Lavender
Lavender looks as good as it smells. The soft silver foliage and fragrant purple blooms make it a natural choice for sunny spots. Plus, you can harvest and dry the flowers to use later in sachets and teas.
10 - Thyme
A favorite for edging and trailing, thyme grows low and softens the border of any box. It pairs beautifully with flowers or other herbs and thrives in sun. If you’re growing edible plants, be sure to use organic seeds and soil safe for herbs.
A window box filled with herbs like thyme, chives, and parsley is beautiful and practical, especially if it’s just outside your kitchen window.
Care Tips for Happy Window Box Plants
Water regularly. Window boxes dry out faster than in-ground beds especially in hot weather. Check moisture daily during summer.
Fertilize every 2–3 weeks. Use a balanced liquid fertilizer to keep your plants blooming and healthy all season.
Deadhead when needed. Some flowers, like geraniums or petunias, benefit from regular removal of spent blooms.
Build Your Best Window Box Yet
It doesn't matter if your windows face full sun, part shade, or deep shade, there’s a perfect mix of plants waiting to be grown. Use bold colors to catch the eye from the curb or go with softer hues for a serene view from your kitchen table. And don’t forget to include herbs for a touch of fragrance and flavor.
Browse our full selection of flower and herb seeds to start planning your perfect window box today.
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3 Easy Window Box Design Ideas (With Planting Recipes)
If you’ve ever stood in front of a tray of flower starts wondering what goes together, these simple planting combos are here to help. If your window box gets sun all day or sits in cool shade, these recipes are designed to flourish and look great from inside and out.
Each mix follows the basic “thriller, filler, spiller” formula (tall, mid-size, trailing), but with a few creative twists. Feel free to mix things up depending on what you love or have on hand.
Sun-Loving Summer Carnival
This one’s all about bold color and big blooms. It’s a great choice if you want your window box to stand out from the street or if you're just a fan of cheerful, high-energy flowers. I planted this combo in a west-facing box last year, and it was still blooming like crazy in late September.
- Thriller: Salvia 'Vista Red' – Tall spikes of deep red that draw in hummingbirds.
- Filler: Zinnia 'Profusion Orange' – Compact, heat-loving blooms that fill the center with bright orange.
- Spiller: Petunia 'Wave Blue' – Spills over the sides in a cascade of purple-blue flowers.
Why it works: The contrast between red, orange, and purple is eye-catching without feeling chaotic. And all three are tough enough to handle hot afternoon sun.
Soft & Serene (for Part Shade)
If you prefer a more calming vibe, this combo leans into soft pastels and texture. It’s ideal for a window that gets morning sun and afternoon shade, like an east-facing kitchen or a shaded porch.
- Thriller: Dusty Miller – Silvery foliage adds a soft contrast and a little height.
- Filler: Impatiens 'Accent Lavender' – Gentle purple blooms that light up in low light.
- Spiller: Sweet Alyssum 'Carpet of Snow' – Tiny, fragrant white flowers that trail softly over the edges.
Why it works: The color palette is soft and subtle, and the textures complement each other beautifully. Plus, the scent of alyssum drifting through an open window is always a bonus.
Cool and Colorful for Full Shade
Shady window boxes don’t have to be dull. This design focuses on foliage color, texture, and a few blooms that hold their own without direct sunlight.
- Thriller: Coleus 'Kong Red' – Huge, colorful leaves with bold red centers.
- Filler: Begonia 'Nonstop Pink' – Reliable summer blooms in a juicy shade of pink.
- Spiller: Creeping Jenny – Bright green vines that tumble out of the box and catch the light.
Why it works: In shade, it’s all about the leaves. This mix gives you color even when the flowers take a break. Plus, coleus leaves are just fun to look at up close.
Tip: Rotate the box every few weeks if one side gets a bit more ambient light. It helps keep everything growing evenly.Edible and Beautiful: The Kitchen Herb Box
This one’s perfect for a sunny spot near your kitchen. It’s practical, fragrant, and still pretty enough to show off. I use mine all season long for quick herb snips while I’m cooking. Bonus: the bees love it too.
- Thriller: Lavender – Upright and aromatic, with soft purple blooms that draw pollinators.
- Filler: Flat-leaf parsley and chives – Useful herbs that grow fast and fill in nicely.
- Spiller: Thyme – A low-growing, trailing herb that softens the edge of the container.
Why it works: You get structure, scent, and flavor—all in one compact planting. Just snip what you need for cooking, and enjoy the scent every time you open the window.
Final Tips for Window Box Success
- Water often. Containers dry out fast, especially in summer. Check daily in hot weather. I like to set a reminder on my phone to check my window boxes a few times a week—especially during hot spells. It’s a small habit, but it keeps everything blooming and happy.
- Fertilize regularly. A dose of all-purpose liquid fertilizer every 2–3 weeks keeps blooms coming.
- Keep it tidy. Deadheading spent blooms helps most flowers rebloom and keeps the whole box looking fresh.
Ready to Grow Your Best Window Box?
The right plants and a simple plan can turn any window into a beautiful focal point. With flowers and herbs suited for full sun, part shade, and shade, it is easy to create a window box that thrives all season long.