Filler Plants for Containers

A filler plant is the mounding, bushy element that ties a container together. It fills the gaps between your thriller and spiller, giving the whole planting a full, lush, finished look. In the thriller-spiller-filler formula, fillers do the heavy lifting in the middle of the pot. They add color, texture, and density that transforms a sparse container into something that looks intentional and abundant.

The number of filler plants 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 filler plants for full, even coverage. Larger containers of 20 inches or more may need four to six or more plants. That extra coverage is what gives an oversized pot a truly complete, abundant look.

Grey pot with tall purple grass, purple blooms, and white flowers cascading over the side in a garden setting
A close-up of Bright Lights™ Purple African Daisy (Osteospermum), a vibrant magenta, heat-tolerant bloom with a dark center and yellow dots, shown among green leaves and buds—ideal for summer color in the garden - Photo Courtesy of Proven Winners, Inc. Bright Lights African Daisies featuring vivid purple, daisy-like blooms with dark centers and green foliage - Photo Property of Garden Crossings LLC

Bright Lights™ Purple African Daisy (Osteospermum)

$10.99
$10.99
Bright Lights™ Red African Daisy (Osteospermum) displays vivid red blooms with dark centers and yellow accents, set against lush green foliage - Photo Property of Garden Crossings LLCTwo Red African Daisy blooms display dark red, striped petals with yellow centers, surrounded by green leaves and buds - Photo Property of Garden Crossings LLC

Bright Lights™ Red African Daisy (Osteospermum)

$10.99
$10.99

A close-up of Bright Lights™ White African Daisy (Osteospermum), a heat-tolerant flower featuring a light brown center, surrounded by green leaves with blurred green buds in the background - Photo Property of Garden Crossings LLCClose-up of White African Daisies in summer bloom, featuring yellow centers, long overlapping petals, and lush green leaves for a vibrant, dense floral display - Photo Courtesy of Proven Winners, Inc.

Bright Lights™ White African Daisy (Osteospermum)

$10.99
$10.99

Close-up of Bright Lights™ Yellow African Daisy blooms with green centers overlapping, filling the image and creating a vibrant, cheerful pattern - Photo Courtesy of Proven Winners, Inc.

Bright Lights™ Yellow African Daisy (Osteospermum)

$10.99
$10.99

Close-up of vibrant purple Bumble Bee™ Blue Calibrachoa, pollinator-friendly flowers with yellow centers among green leaves; some pink blooms are visible in the background - Photo Property of Garden Crossings LLCClose-up of a single vibrant Bumble Bee™ Blue Calibrachoa bloom with a yellow center, surrounded by green leaves and other flowers in the background - Photo Courtesy of Ball Horticulure, Inc.

Bumble Bee™ Blue Calibrachoa

$10.99
$10.99

Bumble Bee™ Hot Pink Calibrachoa features bright magenta-pink blooms with yellow star centers and green leaves. These closely clustered Millionbells create a vibrant, colorful display as trailing annuals - Photo Property of Garden Crossings LLCA round, dark planter featuring vibrant Bumble Bee™ Hot Pink Calibrachoa sits on a circular stone patio surrounded by lush green foliage and large stone decorations in the background. - Photo Courtesy of Ball Horticulure, Inc.

Bumble Bee™ Hot Pink Calibrachoa

$10.99
$10.99

Bumble Bee™ Orange Calibrachoa features vibrant orange flowers with red centers and yellow throats, surrounded by lush green leaves. Delicate veins accent these stunning millionbells, all showcased in glorious full bloom - Photo Property of Garden Crossings LLCA gray flower pot displays a dense, rounded cluster of Bumble Bee™ Orange Calibrachoa, featuring orange and red blooms edged in yellow, all set against a plain white background - Photo Courtesy of Ball Horticulure, Inc. Decorative pot not included.

Bumble Bee™ Orange Calibrachoa

$10.99
$10.99

Tall spikes of vibrant lavender-pink Buzz & Bloom™ Lavender Lullaby Lambs Ear (Stachys) flowers bloom in a garden, surrounded by green foliage and softly blurred plants in the background, creating a colorful and lively outdoor scene - Photo Courtesy of Walters Gardens, Inc.A cluster of tall, purple flowering Buzz & Bloom™ Lavender Lullaby Lambs Ear (Stachys) with green leaves grows in a garden bed covered with brown mulch. Lavender-pink flowers and lush grass, along with other plants, are visible in the background - Photo Courtesy of Walters Gardens, Inc.

Buzz & Bloom™ Lavender Lullaby Lambs Ear (Stachys)

$19.99
$19.99
Tall stalks of white Buzz & Bloom™ White Whisper Lambs Ear flowers grow closely together in a garden, set against a blurred green and brown background - Photo Courtesy of Walters Gardens, Inc.Buzz & Bloom™ White Whisper Lambs Ear (Stachys) is a bushy perennial featuring tall spikes of delicate white flowers surrounded by green, textured leaves - Photo Courtesy of Walters Gardens, Inc.

Buzz & Bloom™ White Whisper Lambs Ear (Stachys)

$19.99
$19.99
Clusters of light pink Cake Pops® Pink Tuberous Verbena blooms with star-shaped petals and green leaves create a dense, vibrant floral display - Photo Property of Garden Crossings LLC.A large blue planter filled with clusters of Cake Pops® Pink Tuberous Verbena, a heat- and humidity-tolerant annual, sits on a sunny grassy lawn. - Photo Property of Garden Crossings LLC

Cake Pops® Pink Tuberous Verbena (Verbena)

$10.99
$10.99

Clusters of vibrant purple blooms from the Cake Pops® Purple Tuberous Verbena create a dense, colorful display - Photo Property of Garden Crossings LLC.Clusters of small, light purple Cake Pops® Purple Tuberous Verbena (Verbena) flowers bloom above dark, leafy stems with green, elongated leaves - Photo Courtesy of Proven Winners, Inc.

Cake Pops® Purple Tuberous Verbena (Verbena)

$10.99
$10.99
Campfire® Flame Bidens showcases bright orange and red daisy-like flowers with yellow centers among lush green leaves - Photo Property of Garden Crossings LLCA dense cluster of Campfire® Flame Bidens displays vibrant orange-red flowers with yellow centers and green leaves. These heat-tolerant annuals feature petals with subtle color gradients, creating a rich, lively look - Photo Courtesy of Proven Winners, Inc.

Campfire® Flame Bidens

$10.99
$10.99

Campfire® Marshmallow™ Bidens displays dense clusters of daisy-like blooms with white petals and yellow centers above green leaves, thriving outdoors in sunlight - Photo Property of Garden Crossings LLCCampfire® Marshmallow™ Bidens features daisy-like blooms with yellow centers beside deep purple, heart-shaped leaves, all thriving in sunlight - Photo Property of Garden Crossings LLC

Campfire® Marshmallow™ Bidens

$10.99
$10.99

A vibrant cluster of Campfire® Red Ember Bidens features orange-red flowers with yellow centers, prominent petals, and vivid stamens - Photo Courtesy of Proven Winners, Inc.A vibrant cluster of Campfire® Red Ember Bidens, with bright red blooms and yellow centers, thrives in a dark, glossy ceramic pot set against a white background - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Campfire® Red Ember Bidens

$10.99
$10.99

Close-up of a Catalina® Gilded Grape™ Wishbone Flower (Torenia) with a dark purple center, rounded yellow petals, and green leaves. This shade to sun plant also displays a small drop of water on its upper petal. - Photo Property of Garden Crossings LLCClose-up of Catalina® Gilded Grape™ Wishbone Flower (Torenia), ideal for hanging baskets or shade to sun spots. Features yellow blooms with purple centers, dark throats, and lush green foliage on rounded, tubular petals - Photo Property of Garden Crossings LLC.

Catalina® Gilded Grape™ Wishbone Flower (Torenia)

$10.99
$10.99

Close-up of Catalina® Grape-O-Licious™ Wishbone Flower (Torenia) with white petals and deep purple centers, surrounded by green leaves and unopened buds - Photo Property of Garden Crossings LLC.Close-up of a cluster of Catalina® Grape-O-Licious™ Wishbone Flowers (Torenia) features white blooms with purple centers and yellow accents, surrounded by green foliage - Photo Courtesy of Proven Winners, Inc.

Catalina® Grape-O-Licious™ Wishbone Flower (Torenia)

$10.99
$10.99

Close-up of Catalina® Midnight Blue Wishbone Flower (Torenia) with vibrant purple petals and yellow-white centers, blooming in clusters among lush green leaves - Photo Property of Garden Crossings LLC.Close-up of Catalina® Midnight Blue Wishbone Flower (Torenia) in full bloom with striking purple-and-white petals, yellow centers, and lush green leaves - Photo Property of Garden Crossings LLC.

Catalina® Midnight Blue Wishbone Flower (Torenia)

$10.99
$10.99

A close-up of a Catalina® Pink Wishbone Flower (Torenia), a top shade annual, with vibrant pink and purple petals, a yellow center, green leaves, and a nearby bud - Photo Property of Garden Crossings LLC.A lush green bush covered with numerous small, trumpet-shaped Catalina® Pink Wishbone Flowers (Torenia) grows beside a paved surface - Photo Property of Garden Crossings LLC.

Catalina® Pink Wishbone Flower (Torenia)

$10.99
$10.99
Two small white Charmed® Wine Shamrock (Oxalis) flowers bloom among deep purple, clover-shaped leaves. The contrast highlights the delicate petals against the richly colored foliage - Photo Property of Garden Crossings LLCCharmed® Wine Shamrock (Oxalis) - Photo Courtesy of Proven Winners, Inc.

Charmed® Wine Shamrock (Oxalis)

$10.99
$10.99

A cluster of bright pink impatiens is surrounded by the vibrant green leaves with deep maroon centers and jagged yellow-green edges of Colorblaze® Strawberry Drop Coleus - Photo Property of Garden Crossings LLCA vibrant Colorblaze® Strawberry Drop Coleus with green, burgundy, and pink foliage grows densely in a round modern gray and taupe ceramic pot against a white background - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

ColorBlaze® Strawberry Drop Coleus

$10.99
$10.99
A close-up of a single Dalina® Grande Cancun Dahlia, featuring vibrant maroon petals that fade to white at the tips, arranged symmetrically in a circular pattern on a plain white background - Photo Courtesy of Ball Horticulure, Inc.

Dalina® Grande Cancun Dahlia

$10.99
$10.99

Close-up of vibrant magenta Dalina® Grande Castillo Dahlia with yellow centers, surrounded by green leaves and unopened buds, blooming beautifully - Photo Property of Garden Crossings LLCA close-up of a vibrant magenta Dalina® Grande Castillo Dahlia with layered petals and a yellow center, set against green leaves - Photo Property of Garden Crossings LLC

Dalina® Grande Castillo Dahlia

$10.99
$10.99

Close-up of Dalina® Grande Cozumel Dahlia in vivid bubblegum pink, fully bloomed with layered petals and a yellow center, set against green leaves and buds - Photo Property of Garden Crossings LLCA potted Dalina® Grande Cozumel Dahlia with large, blooming bubblegum pink flowers and lush green leaves, displayed against a white background - Photo Courtesy of Ball Horticulure, Inc. Decorative pot not included.

Dalina® Grande Cozumel Dahlia

$10.99
$10.99
A close-up of the pale yellow Dalina® Grande Romero Dahlia in full bloom, surrounded by green leaves and dahlia buds - Photo Property of Garden Crossings LLCA close-up of the vivid Dalina® Grande Romero Dahlia in full bloom, showcasing its layered petals radiating from the center against a white background - Photo Courtesy of Ball Horticulure, Inc.

Dalina® Grande Romero Dahlia

$10.99
$10.99