Filler Annuals and Flowers

Filler annuals and flowers are the mounding, colorful workhorses of any container planting. They nestle between your thriller and spiller, filling in gaps with color, texture, and density. That's what gives a container its full, lush, finished look. Because you plant annuals fresh each season, you can experiment with new filler flowers every year. That keeps your container combinations feeling fresh from spring through frost.

The number of filler annuals you need depends on your pot size. A 12-inch pot typically needs one to two plants, while a 14-inch pot looks best with two to three. For an 18-inch pot, plan on three to five plants for full, even coverage. Larger containers of 20 inches or more may need four to six or more plants. That level of coverage gives an oversized pot a truly complete, abundant look.

A vibrant window box filled with red geraniums, Supertunia® Mini Vista® Violet Star Petunia, and white flowers sits against a white-framed window with tall green grasses - Photo Property of Garden Crossings LLC.
A close-up of the Dreamtime® Jumbo Rose Strawflower (Bracteantha) highlights its vibrant pink layered petals and bright yellow-orange center against green foliage - Photo Courtesy of Ball Horticulture, Inc.A close-up of the Dreamtime® Jumbo Rose Strawflower (Bracteantha) with layered petals, set among green leaves and blurred blooms - Photo Courtesy of Ball Horticulture, Inc.

Dreamtime® Jumbo Rose Strawflower (Bracteantha)

$10.99
$10.99

Dreamtime® Jumbo Yellow Strawflower (Bracteantha) features vibrant bright yellow blooms with orange centers and papery petals, clustered among green leaves for a cheerful, colorful display - Photo Courtesy of Ball Horticulture, Inc.Bright yellow blooms of the Dreamtime® Jumbo Yellow Strawflower (Bracteantha), with papery petals and brown centers, stand out among green leaves in sunlight, with some flowers fully open and others still in bud form - Photo Property of Garden Crossings LLC.

Dreamtime® Jumbo Yellow Strawflower (Bracteantha)

$14.99
$14.99

Three pale, star-shaped flowers with light purple veins bloom among green leaves. Endless™ Flirtation Bush Violet offers delicate, five-pointed petals - Photo Property of Garden Crossings LLCA close-up of a white browallia with faint purple veins, green leaves, and blurred red flowers in the background - Photo Property of Garden Crossings LLC

Endless™ Flirtation Bush Violet (Browallia)

$10.99
$10.99

Close-up of vibrant Endless™ Illumination Bush Violet flowers with green leaves, accompanied by a few narrow red-orange blooms - Photo Property of Garden Crossings LLCA cluster of vibrant purple star-shaped flowers, Endless™ Illumination Bush Violet (Browallia) is a stunning blue-toned annual - Photo Courtesy of Proven Winners, Inc.

Endless™ Illumination Bush Violet (Browallia)

$10.99
$10.99

A close-up of vibrant green and yellow-veined leaves, some edged with purple, from Fancifillers™ Guacamole Plectranthus near dark purple foliage and pale pink flowers - Photo Property of Garden Crossings LLC.Close-up of vibrant yellow-green, serrated leaves and deep green veins with purplish stems in the background, showcasing the lush foliage of Fancifillers™ Guacamole Plectranthus - Photo Courtesy of Mast Young Plants.

Fancifillers™ Guacamole Plectranthus

$10.99
$10.99
A vibrant red dahlia blooms among green, serrated leaves, complemented by more red flowers - Photo Property of Garden Crossings LLCThe Funky® Orange Begonia features bright orange double blooms with layered petals and lush green leaves - Photo Courtesy of Proven Winners, Inc.

Funky® Orange Begonia

$10.99
$10.99

A close-up of Funky® Pink Begonia shows double pink blooms with layered petals and jagged green leaves, more pink flowers softly blurred behind - Photo Property of Garden Crossings LLCClose-up of Funky® Pink Begonia's double pink blooms in a wicker hanging basket, amid green leaves and buds. The softly blurred background suggests a porch setting with lush greenery outside - Photo Property of Garden Crossings LLC

Funky® Pink Begonia

$10.99
$10.99

Funky® Red Begonia features bright red double blooms with layered petals and yellow stamens, set against lush green leaves. A visible bud hints at more color - Photo Courtesy of Proven Winners, Inc.A close-up of Funky® Red Begonia, featuring vibrant double blooms and lush green leaves in a hanging basket, set against the softly lit panels of a greenhouse - Photo Property of Garden Crossings LLC

Funky® Red Begonia

$10.99
$10.99

Dense clusters of thin, green, grass-like stems with round white buds give Graceful Grasses® Fiber Optic Grass (Isolepis) a bushy, textured look - Photo Property of Garden Crossings LLC.Close-up of Graceful Grasses® Fiber Optic Grass (Isolepis) showing dense, green, thin upright stems with small brownish tips - Photo Courtesy of Proven Winners, Inc.

Graceful Grasses® Fiber Optic Grass (Isolepis)

$15.99
$15.99

Close-up of Heart to Heart® 'Blushing Bride' Caladium, showcasing heart-shaped leaves in vivid pink, green, and white with striking veins - Photo Courtesy of Proven Winners, Inc.

Heart to Heart® 'Blushing Bride' Caladium

$24.99
$24.99

Heart to Heart® 'Bold 'N Beautiful' Caladium features lush leaves with green edges, creamy centers, and pink-red veins - Photo Property of Garden Crossings LLC. Decorative pot not included. A cluster of Heart to Heart® 'Bold 'N Beautiful' Caladium with large, heart-shaped leaves—bright pink centers and green edges—thrives by a stone border in sun or shade, surrounded by mulch - Photo Courtesy of Proven Winners, Inc.

Heart to Heart® 'Bold 'N Beautiful' Caladium

$24.99
$24.99
The Heart to Heart® 'Bottle Rocket' Caladium features large, heart-shaped leaves with vibrant pink centers, white accents, and green edges. Set in a beige ribbed ceramic pot - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.A large black planter featuring Heart to Heart® 'Bottle Rocket' Caladium with tall, heart-shaped leaves in pink, white, and green shades, surrounded by clusters of small white flowers on a brick patio near a garden. - Photo Courtesy of Proven Winners, Inc.

Heart to Heart® 'Bottle Rocket' Caladium

$24.99
$24.99

Heart to Heart® 'Burning Heart' Caladium features large, heart-shaped leaves in reddish-brown with yellow speckles. This tropical houseplant stands out, while hints of green foliage and a black pot can be seen in the background - Photo Property of Garden Crossings LLCHeart to Heart® 'Burning Heart' Caladium features large, heart-shaped red leaves with pink and white speckles that overlap to form dense, vibrant foliage - Photo Courtesy of Proven Winners, Inc.

Heart to Heart® 'Burning Heart' Caladium

$24.99
$24.99

A cluster of Heart to Heart® 'Chinook' Caladium plants featuring large, heart-shaped salmon pink leaves with white centers and green borders, thriving in dark soil - Photo Property of Garden Crossings LLCA beige speckled ceramic pot features the Heart to Heart® 'Chinook' Caladium, with large, heart-shaped salmon pink leaves accented by green and white veins spreading in various directions - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Heart to Heart® 'Chinook' Caladium

$24.99
$24.99

A close-up of Heart to Heart® 'Clowning Around' Caladium, showing its striking pink and green leaves in a pot, with purple and yellow flowers blooming in the background - Photo Property of Garden Crossings LLC. Decorative pot not included.Close-up of Heart to Heart® 'Clowning Around' Caladium leaves featuring vibrant pink veins, green edges, and light pink and cream splotches for a striking tropical houseplant foliage pattern - Photo Courtesy of Proven Winners, Inc.

Heart to Heart® 'Clowning Around' Caladium

$24.99
$24.99

Close-up of Heart to Heart® 'Creme Brulee' Caladium’s heart-shaped leaves, showcasing pink, red, and green tones with visible veins - Photo Courtesy of Proven Winners, Inc.

Heart to Heart® 'Creme Brulee' Caladium

$24.99
$24.99
Close up of Heart to Heart® 'Flatter Me' Caladium leaves, featuring light green leaves with dark green edges with a red veined center - Photo Courtesy of Proven Winners, Inc.

Heart to Heart® 'Flatter Me' Caladium

$25.99
$25.99
Close-up of Heart to Heart® 'Heart and Soul' Caladium with vibrant green-edged, pink and white leaves dotted with red, growing in a brown pot - Photo Property of Garden Crossings LLC. Decorative pot not included.Heart to Heart® 'Heart and Soul' Caladium displays heart-shaped leaves with green edges, white centers, and pink veins, making it a striking decorative foliage plant - Photo Property of Garden Crossings LLC. Decorative pot not included.

Heart to Heart® 'Heart and Soul' Caladium

$24.99
$24.99
Close-up of Heart to Heart® 'Lemon Blush' Caladium, a favorite shade plant with vibrant leaves showing a bold blend of pink, red, and green hues, prominent veins, and soft edges set against a blurred green background - Photo Property of Garden Crossings LLC

Heart to Heart® 'Lemon Blush' Caladium

$24.99
$24.99
Heart to Heart® 'Mesmerized' Caladium features green and pink, heart-shaped leaves with speckles - Photo Property of Garden Crossings LLC. Decorative pot not included.A beige ceramic pot with a subtle decorative rim and Wakefield branding holds the Heart to Heart® 'Mesmerized' Caladium, a tropical houseplant with heart-shaped green, red, and cream leaves - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Heart to Heart® 'Mesmerized' Caladium

$24.99
$24.99

Close-up of overlapping, heart-shaped leaves of the Heart to Heart® 'Midnight Oil' Caladium, featuring deep burgundy tones with hints of green and purple, smooth glossy texture, and pronounced veins - Photo Courtesy of Proven Winners, Inc.

Heart to Heart® 'Midnight Oil' Caladium

$24.99
$24.99
Heart to Heart® 'Radiance' Caladium features large, heart-shaped leaves with vibrant pink centers, white edges, and dark green borders. This tropical houseplant adds a striking pop of color with its decorative pink foliage - Photo Property of Garden Crossings LLCA cluster of Heart to Heart® 'Radiance' Caladium, featuring striking pink foliage, grows in a garden bed amid soil and other leafy plants with green and yellow tones in the background - Photo Property of Garden Crossings LLC

Heart to Heart® 'Radiance' Caladium

$24.99
$24.99
A vibrant garden display highlights Heart to Heart® Raspberry Moon Caladium, complemented by purple-veined Persian shield foliage and magenta petunias with white-edged blooms, arranged outdoors beside a tree trunk - Photo Property of Garden Crossings LLCThe Heart to Heart® Raspberry Moon Caladium is a shade-loving foliage plant with large, heart-shaped pink, light green, and red leaves in a textured beige ceramic pot, shown against a white background - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Heart to Heart® 'Raspberry Moon' Caladium

$24.99
$24.99

The Heart to Heart® Scarlet Flame Caladium, with large pink and red leaves edged in green, grows in dark soil next to green hosta plants - Photo Property of Garden Crossings LLCHeart to Heart® Scarlet Flame Caladium, featuring vibrant pink and green strap-shaped leaves, grows by a stone wall amid pink flowers, white blooms, and lush greenery - Photo Property of Garden Crossings LLC

Heart to Heart® 'Scarlet Flame' Caladium

$24.99
$24.99