They are the perfect way to bring some seasonal color to your facade.

You don’t need many plants to fill them, yet they still make a substantial impact.

Plus, you’ve got the option to enjoy them both outdoors and from inside the window.

Window box with assorted bright flowers

Alicia Bock / Stocksy

Pay attention to the last chance of frost and freezing temperatures in yourUSDA hardiness growing zone.

Use these window box ideas to spark your imagination.

In the back are yellowcalla lilieswhile fluffy yellow and whitehydrangeasinhabit most of the box.

flower box idea against window with black shutters

Spencer Means / Flickr / CC By 2.0

Spilling over the sides and front are tiny whitebacopa flowers.

The different heights of the plants are visually appealing, and they help to fill out the box.

These plants should start blooming in the late spring, and they must have evenly moist soil.

spring window box with rich red coleus

Spencer Means / Flickr / CC By 2.0

Both the million bells and vinca have long bloom periods, often from spring until fall frost.

A window box with this plant combination should be protected from the strong afternoon sun.

Daffodils bloom in the early spring, and the bulbs are quite easy to grow in containers.

Daffodils in a window box

ballycroy / Getty Images

A mass ofpetuniasin bright purples, pinks, and yellows overflows this window box.

They make a statement, yet still feel soft and natural.

The light chartreuse foliage isAngelina stonecrop.

spring window box with purple, pink, and yellow flowers

Rick Ligthelm / Flickr / CC By 2.0

Waiting to flower in the center is aspring-blooming bulblikely Ornithogalum, or Star of Bethlehem.

double-check a flower box like this has adequate soil drainage.

A window box like this is great if you don’t already have foundation plants under your window.

green and white spring window box

Spencer Means / Flickr / CC By 2.0

That way, the mass of plants in the box won’t feel too busy.

The purple and white color palette keeps things simple, but eye-catching.

And it looks especially nice against a medium blue house.

spring window box with lots of plants

Michael Sprauge / Flickr / CC By 2.0

These plants flower best in full sun, so see to it your box gets plenty of light.

Some varieties producing flowers.

Succulents in this box includekalanchoe(felt plant), pinkecheveria,crassula, andpencil cactus.

spring window box with purple and white flowers

Eric Gross / Flickr / CC By 2.0

Some varieties startbloomingin the spring, though many are summer bloomers.

The variation in heights creates a full look with just two flower types.

Deadheading will help the heliotropes produce more blooms.

succulent window box

The Spruce / Lisa Hallett Taylor

Space your tulip bulbs roughly 2 to 5 inches apart when planting.

They come in both bright and pastel colors.

That way, you won’t have any issues with too many or clashing colors.

Pink hydrangeas in a window box

Garden Photo World / Georgianna Lane / Getty Images

Petunias don’t like dry or soggy soil, so be sure to provide an even amount of moisture.

Use Bright Begonias

Konoplytska / Getty Images

There are several types oftypes of begonias.

Some have a trailing habit and others are more compact with a mounded growth habit.

flower box idea with tulips

Botanical Blitz

Deadhead begonias throughout the season for further blooming.

This plant has a trailing habit and will gently spill over the sides of a window box.

It has dense growth, so it won’t look spindly in its trailing form.

Colorful tulips with cream, pink, and fuchsia petals in flower box

The Spruce / Phoebe Cheong

Even better, it doesn’t need deadheading to continue blooming.

Placing your window box in full sun is best, as too much shade can limit flowering.

Case in point: this window box filled with daisies.

spring window box

Nao Okawa / Flickr / CC By 2.0

The vines interspersed with the colorful flowers add dimension.

Dont be afraid to let them trail down to the ground.

Strawberries ripen from June through July, so an arrangement like this is perfect for a summer window box.

Petunia flowers in window box

Nitsan Merchav / Getty Images

All of these flowers and plants prefer full sun.

In a typical 24-inch window box, five to seven plants is a good number to aim for.

Odd numbers will help you create a pleasing pattern.

Red begonias blooming in a flower box on a balcony

Konoplytska / Getty Images

Besides flowers, you might add green plants, succulents, herbs, and small berries to window boxes.

million bells in a flower box

The Spruce / Autumn Wood

pink cascading window boxes

Photo:Stephanie Perez Designs; Design:Mark D. Sikes

Daisies in a window box

Victoria Pearson / Getty Images

Window box with flowers and vines

Westend61 / Getty Images

Window boxes on a red brick house with green shutters

Grace Cary / Getty Images

Strawberry, calendula, and nasturtium in a window box

Dorling Kindersley: Will Heap / Getty Images

Window box with pumpkins

Grace Cary / Getty Images