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
Superbells® Miss Lilac Calibrachoa features dense clusters of light purple blooms with yellow centers and green foliage - Photo Courtesy of Proven Winners, Inc.A black round pot overflowing with lush green leaves and abundant small, light purple flowers with yellow centers highlights the Superbells® Miss Lilac Calibrachoa - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Superbells® Miss Lilac Calibrachoa

$10.99
$10.99

Close-up of Superbells® Over Easy™ Calibrachoa, showing white blooms with soft yellow centers and delicate, slightly ruffled petals - Photo Property of Garden Crossings LLCSuperbells® Over Easy™ Calibrachoa features clusters of small white blooms with yellow centers, highlighted by lush green leaves next to purple calibrachoa flowers - Photo Property of Garden Crossings LLC

Superbells® Over Easy™ Calibrachoa

$10.99
$10.99

Close-up of Superbells® Pink Calibrachoa, featuring vivid, petunia-like pink blooms with five petals and yellow centers amid lush green leaves. Yellow and deep red flowers are seen in the background - Photo Property of Garden Crossings LLCClose-up of Superbells® Pink Calibrachoa, featuring vibrant pink, petunia-like flowers with yellow centers and delicate veins, blooming among green foliage in a blue-gray pot, petals glistening with water droplets - Photo Property of Garden Crossings LLC. Decorative pot not included.

Superbells® Pink Calibrachoa

$10.99
$10.99
Close-up of Supercal® Premium Caramel Yellow Petchoa flowers—vivid yellow petals with orange-red veining radiate from dark centers, ruffled edges, and are set against lush green foliage - Photo Courtesy of Ball Horticulture, Inc.

Supercal® Premium Caramel Yellow Petchoa

$10.99
$10.99

Supercal® Premium French Vanilla Petchoa displays pale yellow flowers with reddish-orange veins radiating from the centers, creating a vibrant and colorful pattern among green foliage - Photo Courtesy of Ball Horticulture, Inc.

Supercal® Premium French Vanilla Petchoa

$10.99
$10.99

Close-up of Supercal® Premium Purple Dawn Petchoa, a petunia-calibrachoa hybrid, showcasing vibrant pink blooms with dark veins and green foliage - Photo Courtesy of Ball Horticulture, Inc.A close-up of Supercal® Premium Purple Dawn Petchoa, its vibrant blooms held gently between two fingers, with more sun-loving flowers and lush green leaves in the background - Photo Property of Garden Crossings LLC.

Supercal® Premium Purple Dawn Petchoa

$10.99
$10.99

A lush cluster of Supercal® Premium Rose Pink Petchoa blooms with green leaves, flowering closely together in a garden setting - Photo Courtesy of Ball Horticulture, Inc.

Supercal® Premium Rose Pink Petchoa

$10.99
$10.99
Close-up of vibrant Supercal® Premium Sunray Pink Petchoa blooms, featuring yellow and red centers, surrounded by lush green leaves with more flowers visible in the background - Photo Property of Garden Crossings LLC.Close-up of vibrant Supercal® Premium Sunray Pink Petchoa blooms with yellow and dark-centered veins, set among lush green leaves and hints of other colorful flowers in the - Photo Property of Garden Crossings LLC.background.

Supercal® Premium Sunray Pink Petchoa

$10.99
$10.99
A cluster of vibrant Supertunia Mini Vista® Ultramarine™ Petunia blooms with dark centers and delicate deep purple petals fills the frame - Photo Courtesy of Proven Winners, Inc.Three vibrant Supertunia Mini Vista® Ultramarine™ Petunias bloom among green leaves and a few white petunias, creating a colorful display - Photo Property of Garden Crossings LLC.

Supertunia Mini Vista® Ultramarine Petunia

$10.99
$10.99

A lush bed of bright pink Supertunia Vista® Jazzberry® Petunia and dense yellow flowers lines the sidewalk, bordered by green foliage - Photo Property of Garden Crossings LLC.A vibrant garden bed features clusters of Supertunia Vista® Jazzberry® Petunia with fuchsia-purple blooms in front, pink canna lilies and lush green foliage behind, white flowers, stone edging, and a pergola in the background - Photo Property of Garden Crossings LLC.

Supertunia Vista® Jazzberry® Petunia

$10.99
$10.99

A vibrant flower bed showcases Supertunia Vista® Silverberry Petunia in full bloom, with trailing varieties creating a lush, eye-catching display against a backdrop of green grass and a distant road - Photo Property of Garden Crossings LLC.A large white planter filled with Petunias, showcasing pink, magenta, and white blooms, sits on a garden sidewalk surrounded by lush greenery and colorful plants - Photo Property of Garden Crossings LLC. Decorative pot not included.

Supertunia Vista® Silverberry Petunia

$10.99
$10.99

Supertunia® Hoopla™ Vivid Orchid™ Petunia features bright magenta, bi-color blooms with white edges and a dark center, funnel-shaped flowers, and lush green leaves - Photo Property of Garden Crossings LLC.A close-up of Supertunia® Hoopla™ Vivid Orchid™ Petunia, a striking bi-color petunia with white-edged petals, surrounded by green foliage and other purple blooms - Photo Property of Garden Crossings LLC.

Supertunia® Hoopla® Vivid Orchid™ Petunia

$10.99
$10.99

A cluster of Supertunia® Lovie Dovie™ Petunias in full bloom displays striking bicolor striped petals with dark centers, set against lush green foliage - Photo Property of Garden Crossings LLC.Close-up of Supertunia® Lovie Dovie™ Petunia, a vivid bicolor bloom with white petals and bold magenta streaks. Green leaves and nearby flowers, including a small magenta bloom with a yellow center, surround this trailing petunia - Photo Property of Garden Crossings LLC.

Supertunia® Lovie Dovie™ Petunia

$10.99
$10.99
A cluster of Supertunia® Saffron Finch™ Petunia flowers features pale yellow petals with darker centers, surrounded by green leaves - Photo Property of Garden Crossings LLC.Three Supertunia® Saffron Finch™ Petunias with yellow blooms edged in white and dark veined petals show a mounding habit among green and purple leaves, all displayed in a textured blue and tan pot - Photo Property of Garden Crossings LLC. Decorative pot not included.

Supertunia® Saffron Finch™ Petunia

$10.99
$10.99

Close-up of vibrant Surefire Red Begonia blooms with yellow centers, set against glossy dark green leaves—delicate, overlapping petals form dense clusters - Photo Courtesy of Proven Winners, Inc.The Surefire Cascade Red Begonia, in a beige ceramic pot, features lush dark green leaves and vibrant red blooms that stand out against a white background - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Surefire Cascade™ Red Begonia

$10.99
$10.99

A close-up of a blue flower pot with white and purple flowers, highlighted by the bright green, deeply lobed foliage of Sweet Caroline Medusa™ Green Ornamental Sweet Potato Vine (Ipomoea) in the sunligh - Photo Property of Garden Crossings LLC. Decorative pot not included.The Sweet Caroline Medusa™ Green Ornamental Sweet Potato Vine (Ipomoea), with its long, narrow green leaves, is surrounded by pink and purple flowers, flourishing over reddish-brown mulch in a garden - Photo Property of Garden Crossings LLC. Decorative pot not included.

Sweet Caroline Medusa™ Green Ornamental Sweet Potato Vine (Ipomoea)

$10.99
$10.99

Close-up of overlapping Sweet Caroline Sweetheart Shadowstorm™ Ornamental Sweet Potato Vine (Ipomoea) leaves, displaying dark purple and bright green heart-shaped foliage with irregular green patches and distinct veins - Photo Courtesy of Proven Winners, Inc.Sweet Caroline Sweetheart Shadowstorm™ Ornamental Sweet Potato Vine (Ipomoea) features dense, heart-shaped dark purple and green variegated leaves in a simple dark ceramic pot, beautifully displayed against a white background - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Sweet Caroline Sweetheart Shadowstorm™ Ornamental Sweet Potato Vine (Ipomoea)

$10.99
$10.99

Totally Tempted™ Frosted Violets Cuphea features clusters of purple and white blooms with green foliage. The vibrant petals are deep purple at the center, fading to white edges, resembling frosted violets - Photo Property of Garden Crossings LLCTotally Tempted™ Frosted Violets Cuphea features purple and white blooms with ruffled edges amid green leaves, creating vibrant contrasts as a stunning pollinator plant for any lush, healthy garden - Photo Courtesy of Proven Winners, Inc.

Totally Tempted® Frosted Violets™ Cuphea

$10.99
$10.99
Clusters of Totally Tempted™ Richly Red™ Cuphea showcase ruffled red petals with purple-red centers and lush green leaves - Photo Courtesy of Proven Winners, Inc.The Totally Tempted™ Richly Red™ Cuphea, a long-blooming annual, showcases dense green leaves and vibrant red flowers in a light green pot set against a white background - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Totally Tempted® Richly Red™ Cuphea

$10.99
$10.99

Clusters of vibrant purple, ruffled-petal flowers with deep centers cover the Totally Tempted™ Vivid Violet Cuphea. This long-blooming annual has green, lance-shaped leaves and is a pollinator favorite for any garden - Photo Courtesy of Proven Winners, Inc.

Totally Tempted® Vivid Violet™ Cuphea

$10.99
$10.99
Truffula® Pink Globe Amaranth (Gomphrena) features vibrant pink blooms with green stems and leaves in the foreground. The background fades to a colorful garden and grassy lawn - Photo Property of Garden Crossings LLC.A dense group of Truffula® Pink Globe Amaranth (Gomphrena) blooms with round, purple-pink flowers over trimmed grass - Photo Property of Garden Crossings LLC.

Truffula™ Pink Globe Amaranth (Gomphrena)

$11.99
$11.99