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
Close-up of a single Sunpatiens® Compact Pink Flash Impatiens bloom, featuring five rounded pink petals with a green center and subtle white gradient, heat-tolerant and isolated on a white background - Photo Courtesy of Ball Horticulure, Inc.Close-up of several vibrant Sunpatiens® Compact Pink Flash Impatiens, heat-tolerant flowers with delicate pink petals and green leaves partly visible in the background - Photo Property of Garden Crossings LLC.

Sunpatiens® Compact Pink Flash Impatiens

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Sunpatiens® Compact Candy Purple Impatiens features five-petaled, clustered lavender-pink blooms surrounded by dark green leaves, creating a vibrant and colorful display - Photo Property of Garden Crossings LLC.A cluster of Sunpatiens® Compact Candy Purple Impatiens displays lush green leaves and five-petaled lavender-pink blooms with deep pink centers, forming a dense, colorful show with closely packed flowers - Photo Property of Garden Crossings LLC.

SunPatiens® Compact Purple Candy Impatiens

$10.99
$10.99

A cluster of vibrant Sunpatiens® Compact Purple Impatiens blooms amid green leaves and variegated hosta foliage, creating a striking display in a garden bed - Photo Property of Garden Crossings LLC.Clusters of vibrant Sunpatiens® Compact Purple Impatiens bloom amid yellow-green ground cover, with open fields and trees beyond - Photo Property of Garden Crossings LLC.

SunPatiens® Compact Purple Impatiens

$10.99
$10.99

Close-up of SunPatiens® Compact Red Candy Impatiens, showing vibrant red-to-pink gradient petals and dark green leaves in the background - Photo Courtesy of Ball Horticulure, Inc.Sunpatiens® Compact Red Candy Impatiens showcases clusters of vibrant pink and red gradient petals amid lush green leaves, creating a colorful, lively display ideal for sunny spots - Photo Property of Garden Crossings LLC.

Sunpatiens® Compact Red Candy Impatiens

$10.99
$10.99
Two vibrant magenta Sunpatiens® Compact Rose Glow Impatiens with dew-kissed petals, framed by lush green leaves - Photo Courtesy of Ball Horticulure, Inc.

Sunpatiens® Compact Rose Glow Impatiens

$10.99
$10.99

Close-up of vibrant pink Sunpatiens® Compact Royal Magenta Impatiens with overlapping petals and small white centers, filling the frame in a sun-tolerant floral display - Photo Courtesy of Proven Winners, Inc.Sunpatiens® Compact Royal Magenta Impatiens in full bloom display bright magenta flowers with five rounded petals and small red centers, set against dark green serrated leaves, with buds nearby - Photo Property of Garden Crossings LLC.

SunPatiens® Compact Royal Magenta Impatiens

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Sunsatia® Blood Orange™ Nemesia features vibrant orange and red flowers with yellow centers, set against lush green foliage - Photo Property of Garden Crossings LLC.A dense cluster of vibrant orange and red Sunsatia® Blood Orange™ Nemesia blooms creates a rich, textured display filling spaces with warm tones and delicate petal patterns - Photo Courtesy of Proven Winners, Inc.

Sunsatia® Blood Orange™ Nemesia

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$10.99

A cluster of vibrant Sunstar® Lavender Egyptian Star Flower (Pentas) blooms with pointed petals, densely packed for a lush and colorful presentation - Photo Courtesy of Proven Winners, Inc.A white pot with green foliage and vibrant light purple Sunstar® Lavender Egyptian Star Flower (Pentas) blooms - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Sunstar® Lavender Egyptian Star Flower (Pentas)

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Clusters of vibrant pink Sunstar® Pink Egyptian Star Flower (Pentas) bloom among lush green leaves, creating a dense, colorful display - Photo Property of Garden Crossings LLCA cluster of pale pink, star-shaped Sunstar® Pink Egyptian Star Flower (Pentas) with white centers and pointed petals, set among dark green leaves - Photo Property of Garden Crossings LLC

Sunstar® Pink Egyptian Star Flower (Pentas)

$10.99
$10.99

Clusters of vibrant pink, star-shaped Sunstar® Red Egyptian Star Flower (Pentas) with dark green leaves, pink flowers can be seen below it - Photo Property of Garden Crossings LLCSunstar® Red Egyptian Star Flower (Pentas) features bright pink, star-shaped flowers with white centers and bold green leaves - Photo Property of Garden Crossings LLC

Sunstar® Red Egyptian Star Flower (Pentas)

$10.99
$10.99

Clusters of vibrant pink and red star-shaped flowers with white centers bloom among lush green leaves - Photo Property of Garden Crossings LLCClusters of bright pink, star-shaped blooms stand out among lush green leaves on the Sunstar® Rose Egyptian Star Flower (Pentas) - Photo Property of Garden Crossings LLC

Sunstar® Rose Egyptian Star Flower (Pentas)

$10.99
$10.99

A close-up of Superbells Magic® Double Grapefruit Calibrachoa shows layered pink, yellow, and peach blooms—ideal for adding vibrant color and pattern to hanging baskets. - Photo Courtesy of Proven Winners, Inc.A green pot displays Superbells Magic® Double Grapefruit Calibrachoa, bursting with lush foliage and an abundance of yellow and pink double blooms - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Superbells Magic® Double Grapefruit Calibrachoa

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Superbells® Magic™ Pink Lemonade Calibrachoa features clusters of pink, yellow, and white blooms among green leaves - Photo Property of Garden Crossings LLCA vibrant cluster of Superbells® Magic™ Pink Lemonade Calibrachoa blooms pink and yellow in sunlight, surrounded by lush green foliage and tall grasses - Photo Property of Garden Crossings LLC

Superbells Magic® Pink Lemonade Calibrachoa

$10.99
$10.99
Bright magenta and deep purple blooms with yellow centers spill over lush foliage in hanging baskets, creating a vibrant, dense display - Photo Property of Garden Crossings LLCA cluster of vibrant purple and magenta Superbells® Blackcurrant Punch™ Calibrachoa with dark centers and yellow throats, resembling beautifully set against green leaves - Photo Property of Garden Crossings LLC

Superbells® Blackcurrant Punch™ Calibrachoa

$10.99
$10.99

Superbells® Blue Calibrachoa features petunia-like purple flowers with yellow centers and lush green foliage, forming a dense, vibrant display - Photo Courtesy of Proven Winners, Inc.

Superbells® Blue Calibrachoa

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$10.99

Top down view of Superbells® Blue Moon Punch™ Calibrachoa features vibrant blooms with deep purple centers and yellow throats, set against green foliage - Photo Property of Garden Crossings LLCClose-up of Superbells® Blue Moon Punch™ Calibrachoa with rich purple blooms and dark centers, surrounded by green leaves and vibrant magenta flowers - Photo Property of Garden Crossings LLC

Superbells® Blue Moon Punch™ Calibrachoa

$10.99
$10.99

Close-up of vivid magenta flowers with yellow centers and lush foliage, accented by a pale pink bloom - Photo Property of Garden Crossings LLCSuperbells® Cherry Red Calibrachoa features vibrant magenta flowers with yellow centers and delicate veining - Photo Courtesy of Proven Winners, Inc.

Superbells® Cherry Red Calibrachoa

$10.99
$10.99
A cluster of vibrant pink Superbells® Cherry Star Calibrachoa flowers with yellow centers and delicate veins, set against lush green leaves - Photo Courtesy of Proven Winners, Inc.Superbells® Cherry Star Calibrachoa fills a yellow pot with lush green leaves and vivid pink, star-patterned flowers with yellow centers, creating a striking display in any hanging basket - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Superbells® Cherry Star Calibrachoa

$10.99
$10.99
Close-up of several pink flowers with yellow centers and green leaves - Photo Property of Garden Crossings LLCSuperbells® Coralina Calibrachoa features clusters of coral-pink blooms with yellow-red centers. Delicate veined petals and lush green foliage provide vibrant color and texture to any display - Photo Courtesy of Proven Winners, Inc.

Superbells® Coralina Calibrachoa

$10.99
$10.99

Close-up of Superbells® Double Ruby Calibrachoa in vivid bloom, with lush, velvety layered petals and rich red color surrounded by green leaves, creating a striking, colorful display - Photo Property of Garden Crossings LLCA close-up of vibrant flowers, highlighting deep red Superbells® Double Ruby Calibrachoa blooms, a striking purple petunia at the center, clusters of small white flowers, and lush surrounding green foliage - Photo Property of Garden Crossings LLC

Superbells® Double Ruby Calibrachoa

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$10.99
A lush hanging basket planter overflows with vibrant Superbells® Dreamsicle® Calibrachoa, showcasing vivid orange blooms and green foliage, while trailing petunias add extra color in the background - Photo Property of Garden Crossings LLC. Decorative pot not included.A cluster of Superbells® Dreamsicle® Calibrachoa with vivid red-orange and purple petals blooms among lush green foliage next to purple flowers - Photo Property of Garden Crossings LLC

Superbells® Dreamsicle® Calibrachoa

$10.99
$10.99

Two Superbells® Evening Star™ Calibrachoa flowers with yellow and dark purple centers are surrounded by green leaves. The petals have a soft texture, and water droplets can be seen on one lavender bloom - Photo Property of Garden Crossings LLCA cluster of vibrant Superbells® Evening Star™ Calibrachoa, mostly purple with yellow centers, is paired with orange blooms and a white-purple flower amid green leaves on a wooden background - Photo Property of Garden Crossings LLC

Superbells® Evening Star™ Calibrachoa

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$10.99

A cluster of vibrant purple Superbells® Grape Punch™ Calibrachoa with yellow centers, accented by white flowers and lush green leaves, creates a dense, colorful display ideal for hanging baskets - Photo Property of Garden Crossings LLC. Decorative pot not included.A hand holds vibrant Superbells® Grape Punch™ Calibrachoa flowers with yellow centers and dark veins amid green leaves, sunlight illuminating the petals - Photo Property of Garden Crossings LLC

Superbells® Grape Punch™ Calibrachoa

$10.99
$10.99

The Superbells® Holy Moly!® Calibrachoa features vibrant blooms with white petals splashed with bright yellow and pink, surrounded by green foliage - Photo Property of Garden Crossings LLCSuperbells® Holy Moly!® Calibrachoa features clusters of vibrant yellow flowers streaked with pink, set against dense green foliage - Photo Property of Garden Crossings LLC

Superbells® Holy Moly!® Calibrachoa

$10.99
$10.99