16+ Best Flowers for Full Sun Window Boxes

Window boxes are the perfect way to add color and charm to your home, especially when they’re basking in the full sun. Let me share with you some of my favorite sun-loving flowers that will turn your window boxes into a stunning display.

1. Petunias: The Reliable Bloomer

Petunias provide a lush and colorful display in sunny window boxes.
Petunias provide a lush and colorful display in sunny window boxes.

Petunias are reliable bloomers that thrive in full sun and offer a wide range of colors. Their trailing nature makes them ideal for filling window boxes with lush, continuous flowers.

Check if these fit your needs:

  • Petunia Flower Seeds Pack: Enhance your window box with vibrant petunia seeds. Achieve lush, colorful blooms effortlessly.
  • Window Box Planters: Upgrade your home’s exterior using stylish window box planters. Ideal for sunny spots.
  • All-Purpose Plant Fertilizer: Nourish your petunias for a healthy bloom with an easy-to-use plant fertilizer.

2. Angelonia: The Summer Snapdragon

Angelonia adds vertical interest to sunny window boxes with its flower spikes.
Angelonia adds vertical interest to sunny window boxes with its flower spikes.

Angelonia, known as the summer snapdragon, thrives in heat and adds vertical interest with its upright flower spikes.

Maybe worth checking out:

  • Window Box Planters: Enhance your home with elegant window box planters ideal for stunning Angelonia displays.
  • Potting Mix for Flowers: Ensure vibrant Angelonia blooms with high-quality potting mix designed for optimal plant growth.
  • Plant Fertilizer for Blooming Plants: Boost Angelonia health and flowering with specialized fertilizer for abundant summer blooms.

3. Lantana: A Versatile Performer

Lantana adds vibrant color and attracts pollinators to sunny window boxes.
Lantana adds vibrant color and attracts pollinators to sunny window boxes.

Lantana is a versatile star that can thrill, fill, and spill over your window box edges. Its vibrant clusters of flowers attract hummingbirds and butterflies, making it a lively addition to your sunny spots.

You might give these a try:

  • Window Box Planters: Enhance your space with durable window box planters that showcase Lantana beautifully.
  • Organic Potting Soil: Boost Lantana growth with high-quality organic potting soil for optimal health and vibrancy.
  • Watering Can with Sprout: Ensure proper hydration for your Lantana using a convenient watering can with a sprout.

4. Globe Amaranth: The Long-Lasting Bloom

Globe Amaranth offers long-lasting blooms and playful texture in sunny window boxes.
Globe Amaranth offers long-lasting blooms and playful texture in sunny window boxes.

With its long-lasting, cotton ball-shaped blooms, Globe Amaranth is a heat-loving plant that brings playful texture and color to sunny window boxes.

Possibly helpful picks:

  • Heat-Resistant Window Box Planter: Enhance your sunny window with this stylish, heat-resistant planter, perfect for bright blooms!
  • Watering Can with Long Spout: Easily reach your window box plants with this convenient long-spout watering can!
  • Organic Flower Fertilizer: Promote vibrant blooms with this gentle, organic flower fertilizer ideal for sunny conditions!

5. Zahara Zinnia: Bold and Beautiful

Zahara Zinnias offer bold, cheerful colors for sunny window boxes.
Zahara Zinnias offer bold, cheerful colors for sunny window boxes.

The Zahara Zinnia is perfect for adding a pop of bold color to your window box. These low-maintenance flowers thrive in the sun and fill your space with cheerful hues from summer to fall.

Useful items to consider:

  • High-Quality Window Box Planter: Elevate your garden with a sturdy, stylish planter ideal for sun-loving Zinnias.
  • Organic Potting Soil Mix: Boost your Zinnias’ growth with nutrient-rich soil designed for healthy, vibrant blooms.
  • Watering Can with Long Spout: Keep Zinnias hydrated effortlessly with an ergonomic watering can suited for window boxes.

6. Calibrachoa: The Sweet Spiller

Calibrachoa's cascading blooms add charm to sunny window boxes.
Calibrachoa’s cascading blooms add charm to sunny window boxes.

Known for its cascading habit, Calibrachoa spills effortlessly over window box edges, offering a cascade of tiny, vibrant blooms. It’s a favorite in my garden for its continual blooming and ease of care.

Some ideas to consider:

  • Self-Watering Window Box Planters: Keep your Calibrachoa thriving with these self-watering planters designed for hassle-free gardening.
  • Organic Potting Mix for Flowers: Provide essential nutrients with this organic potting mix, perfect for vibrant and healthy blooms.
  • Colorful Calibrachoa Seed Pack: Transform your window box with this diverse seed pack, offering a stunning array of colors.

7. Bidens: Bright and Cheerful

Brighten up your sunny window box with cheerful Bidens flowers.
Brighten up your sunny window box with cheerful Bidens flowers.

Bidens brighten up any window box with their cheerful, daisy-like flowers. These heat-loving plants continue to bloom vibrantly throughout the warm months.

Items that may come in handy:

  • Daisy-Like Flower Seeds Pack: Transform your window boxes with vibrant, long-blooming daisy-like flowers, perfect for sunny spots.
  • Self-Watering Window Box Planter: Keep your Bidens thriving with a self-watering planter, ideal for maintaining moisture in full sun.
  • Organic Potting Soil for Flowers: Enhance growth with premium organic potting soil, giving your blooms the nutrients they need.

8. Salvia: A Tall Beauty

Tall and elegant, Salvia adds height and beauty to sunny window boxes.
Tall and elegant, Salvia adds height and beauty to sunny window boxes.

Salvia brings height and elegance to your window box setup with its tall, spiky blooms. This sun-loving flower will add that extra dimension, creating a beautiful backdrop for your arrangement.

Products that could assist:

  • Outdoor Flower Planter Box: Elevate your garden aesthetics with a stylish planter box perfect for sun-loving salvias.
  • Organic Potting Soil Mix: Boost plant growth with this nutrient-rich, moisture-retaining potting mix for vibrant flowers.
  • Garden Fertilizer for Flowers: Enhance bloom production with this specialized fertilizer designed for flowering plants.

9. Geraniums: The Classic Choice

Classic geraniums bring timeless beauty to sunny window boxes.
Classic geraniums bring timeless beauty to sunny window boxes.

You can’t go wrong with Geraniums in your sunny window box—they’re a classic for a reason! Their bold blooms and sturdy stems stand tall, providing that perfect ‘wow’ factor in any arrangement.

Might be a good match:

  • Geranium Flower Seeds: Grow brilliant geraniums in your sunny window box, enjoying their vibrant blossoms and lush foliage.
  • Outdoor Window Box Planter: Enhance your floral display with a sturdy window box perfect for showcasing vibrant geraniums.
  • Plant Fertilizer for Flowers: Boost your geraniums’ growth with nutrient-rich fertilizer designed for vivid blooms all season.

10. Heliotrope: Fragrant and Lovely

Heliotrope provides fragrance and elegance in sunny window boxes.
Heliotrope provides fragrance and elegance in sunny window boxes.

Not only does Heliotrope offer a lovely fragrance, but its clusters of purple flowers add a touch of elegance to any sunny window box.

A few helpful options:

  • Heliotrope Seeds: Grow your own fragrant heliotropes and bring elegance to your sunny window boxes.
  • Wooden Window Box Planter: Enhance your home’s exterior with this stylish wooden planter, perfect for sun-loving flowers.
  • Organic Plant Fertilizer: Boost the growth of your heliotropes with this organic plant fertilizer, ideal for sunny spots.

11. Euphorbia: The Airy Accent

Euphorbia adds an airy accent to sunny window boxes.
Euphorbia adds an airy accent to sunny window boxes.

Think of Euphorbia as a delicate whisper in your window box that complements bolder blooms with its airy, white flowers.

A few things you might like:

  • Euphorbia Plant Seeds: Sow these seeds to bring a delicate, airy touch to your window box garden today.
  • Window Box Planter: Enhance your home’s exterior by planting in stylish, durable window box planters.
  • Plant Fertilizer for Flowers: Boost your Euphorbia’s growth with this specially formulated flower fertilizer blend.

12. Persian Shield: Foliage with Flair

Persian Shield adds unique texture and color to sunny window boxes.
Persian Shield adds unique texture and color to sunny window boxes.

For a touch of the unexpected, add Persian Shield with its iridescent purple leaves. This stunning foliage plant thrives in the sun and brings a unique texture to your arrangements.

A few suggestions:

  • Persian Shield Live Plant: Add vibrant color and texture with live Persian Shield plants for sunny window boxes.
  • Decorative Window Planter Box: Enhance your exterior with stylish window boxes, perfect for showcasing Persian Shield plants.
  • Organic Potting Soil Mix: Boost your plants with rich organic potting soil, ideal for healthy and vibrant Persian Shields.

13. Purslane: The Resilient Succulent

Purslane offers vibrant blooms and resilience in sunny window boxes.
Purslane offers vibrant blooms and resilience in sunny window boxes.

For a drought-tolerant option, Purslane blooms all summer with vibrant hues, making it an excellent choice for those hot, sunny spots.

Give these a look:

  • Purslane Seeds Pack: Grow vibrant, sun-loving blooms with ease. Perfect for brightening window boxes all summer long.
  • Self-Watering Window Box Planter: Simplify plant care with a self-watering box, ideal for drought-tolerant succulents like purslane.
  • Organic Potting Soil for Succulents: Ensure healthy growth with nutrient-rich, well-draining soil tailored for succulents and sun-lovers.

14. Trailing Verbena: The Spilling Star

Trailing Verbena adds a soft, romantic touch to sunny window boxes.
Trailing Verbena adds a soft, romantic touch to sunny window boxes.

With its delicate flowers and trailing habit, Trailing Verbena is my go-to for a spiller that adds a soft, romantic touch to any sunny window box.

Possibly handy products:

  • Trailing Verbena Seeds Pack: Add vibrant color to your window box with easy-to-grow trailing verbena seeds. Perfect for sunny spots!
  • Self-Watering Window Box Planter: Simplify gardening with a self-watering planter, ideal for maintaining vibrant trailing verbena effortlessly.
  • Organic Flower Fertilizer: Boost your blooms with this gentle, organic fertilizer formulated for vibrant, trailing flowers in sunlight.

15. Creeping Jenny: The Lime Green Pop

Creeping Jenny offers a vibrant lime green contrast in sunny window boxes.
Creeping Jenny offers a vibrant lime green contrast in sunny window boxes.

Add a splash of lime green with Creeping Jenny, which spills beautifully over the edge and provides a vibrant contrast to colorful blooms.

Try these:

  • Window Box Planter: Enhance your home’s aesthetic with a durable window box planter perfect for Creeping Jenny.
  • Premium Potting Soil: Boost plant health with nutrient-rich potting soil, ideal for Creeping Jenny and other sun-lovers.
  • Self-Watering Plant System: Ensure optimal hydration for your window box plants with a convenient self-watering system.

16. Mexican Hair Grass: The Textural Element

Mexican Hair Grass adds texture and movement to sunny window boxes.
Mexican Hair Grass adds texture and movement to sunny window boxes.

For a touch of texture, Mexican Hair Grass adds movement and height to your window box, creating a dynamic and flowing display.

Some handy options:

  • Mexican Hair Grass Seeds: Add dynamic movement to your garden with vibrant Mexican Hair Grass seeds. Easy to plant.
  • Window Box Planters: Enhance your window display with these stylish, durable planters. Perfect for full-sun exposure.
  • Organic Potting Soil: Ensure healthy growth with premium organic potting soil, ideal for container gardening and window boxes.

Text: Joyce Peterson