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
Clusters of vibrant pink and yellow Luscious® Royale Cosmo Lantana blooms pair with dark purple foliage, set against green grass - Photo Property of Garden Crossings LLC.Luscious® Royale Cosmo Lantana features clusters of vibrant, drought-tolerant flowers in pink, yellow, and orange shades blooming among green leaves in bright sunlight - Photo Property of Garden Crossings LLC. Decorative pot not included.

Luscious® Royale Cosmo Lantana

$10.99
$10.99

Close-up of Luscious® Royale Piña Colada Lantana, featuring clusters of small white and yellow flowers with green buds and leaves - Photo Property of Garden Crossings LLC.Close-up of Luscious® Royale Piña Colada Lantana: clusters of small, tubular flowers with white petals and yellow centers stand out against dark green leaves - Photo Courtesy of Proven Winners, Inc.

Luscious® Royale Piña Colada Lantana

$10.99
$10.99
Brightly lit by sunlight, Luscious® Royale Red Zone™ Lantana displays clusters of vibrant red and yellow flowers with green leaves in the background - Photo Property of Garden Crossings LLC.The Luscious® Royale Red Zone™ Lantana features vibrant red, orange, and yellow blooms among green leaves in a rustic stone planter - Photo Property of Garden Crossings LLC. Decorative pot not included.

Luscious® Royale Red Zone™ Lantana

$10.99
$10.99

Close-up of vibrant pinkish-red tubular flowers on Maestro® Coral Hummingbird Mint (Agastache) with green stems and leaves, highlighting detailed petals and striking colors - Photo Courtesy of Proven Winners, Inc.Maestro® Coral Hummingbird Mint (Agastache) features pink blooms and dark purple-green leaves. This pollinator-friendly plant creates a lush, colorful display with dense flowers, shown here against a crisp white background - Photo Courtesy of Proven Winners, Inc.

Maestro® Coral Hummingbird Mint (Agastache)

$10.99
$10.99
Close-up of Majestic Giants Blue White Blotch Pansy (Viola), featuring vivid white petals with deep purple blotches and lush green leaves. The soft-focus background enhances the striking early spring colors and unique patterns - Photo Courtesy of Ball Horticulture, Inc.

Majestic Giants II Blue And White with Blotch Pansy (Viola)

$10.99
$10.99

Bright orange and yellow blooms with ruffled petals top green, serrated leaves in a dark round planter - Photo Courtesy of Proven Winners, Inc.

Nonstop® Fire Tuberous Begonia

$10.99
$10.99

The Nonstop® Mocca Scarlet Tuberous Begonia features double scarlet-red blooms and dark green, slightly fuzzy, wavy-edged leaves - Photo Property of Garden Crossings LLCA close-up of a vibrant red rose-like bloom, with velvety petals and rich hues, surrounded by jagged-edged dark green leaves - Photo Property of Garden Crossings LLC

Nonstop® Mocca Scarlet Tuberous Begonia

$10.99
$10.99

Close-up of vibrant Nonstop® Mocca Yellow Tuberous Begonia blooms with double petals, set against dark green, textured leaves - Photo Property of Garden Crossings LLCA vibrant Nonstop® Mocca Yellow Tuberous Begonia blooms amid dark green leaves, with a pinkish-yellow bud nearby - Photo Property of Garden Crossings LLC

Nonstop® Mocca Yellow Tuberous Begonia

$10.99
$10.99
The Nonstop® Orange Tuberous Begonia, featuring vibrant ruffled petals, is in full bloom amid lush green leaves and budding flowers - Photo Property of Garden Crossings LLCThe Nonstop® Orange Tuberous Begonia features vibrant orange, multi-layered blooms set against broad, green, ruffled leaves, highlighting the beauty of this remarkable begonia - Photo Property of Garden Crossings LLC

Nonstop® Orange Tuberous Begonia

$10.99
$10.99

The Nonstop® Red Tuberous Begonia features ruffled, vibrant red blooms surrounded by lush green foliage. This shade-loving plant dazzles with extra large flowers and beautiful layered textures - Photo Property of Garden Crossings LLCThe Nonstop® Red Tuberous Begonia features extra-large, vibrant red blooms with layered petals and serrated edges, set among lush green leaves—making it a stunning, showstopping plant for shady areas - Photo Property of Garden Crossings LLC

Nonstop® Red Tuberous Begonia

$10.99
$10.99
A close-up of a Nonstop® White Tuberous Begonia reveals its elegant, ruffled white petals surrounded by dark green leaves, with a larger leaf partially visible in the background - Photo Property of Garden Crossings LLCA close-up of the Nonstop® White Tuberous Begonia highlights its large, delicate double white blooms adorned with water droplets and surrounded by lush, dark green foliage - Photo Property of Garden Crossings LLC

Nonstop® White Tuberous Begonia

$10.99
$10.99
Close-up of a vibrant Nonstop® Yellow Tuberous Begonia, prized for its layered petals and water droplets, surrounded by dark green serrated leaves - Photo Property of Garden Crossings LLCThe Nonstop® Yellow Tuberous Begonia features bright yellow blooms among green, slightly ruffled, scalloped leaves. Some foliage shows red and brown tinges, while water droplets rest on the vibrant flower petals - Photo Property of Garden Crossings LLC

Nonstop® Yellow Tuberous Begonia

$10.99
$10.99

A close-up of Plum Dandy™ Alternanthera reveals lush, oval leaves in green and deep purple with a few bright pinkish-red ones. The densely clustered foliage is perfect for container gardening - Photo Property of Garden Crossings LLC. Decorative pot not included.A large blue ceramic pot features lush foliage of Plum Dandy™ Alternanthera, highlighted by soft purple and white flowers—an eye-catching container garden displayed on a stone patio surrounded by greenery and rocks - Photo Property of Garden Crossings LLC. Decorative pot not included.

Plum Dandy™ Alternanthera

$10.99
$10.99

Primo® 'Peachberry Ice' Coral Bells (Heuchera) with ruffled reddish-bronze leaves and delicate white flowers on slender stems, thriving in soil with green foliage as a backdrop - Photo Property of Garden Crossings LLC.Primo® 'Peachberry Ice' Coral Bells (Heuchera) with ruffled, lobed red and pink leaves, thriving in mulch-covered soil among pine needles - Photo Property of Garden Crossings LLC.

Primo® 'Peachberry Ice' Coral Bells (Heuchera)

$18.99
$18.99

Primo® 'Wild Rose' Coral Bells (Heuchera) is a striking perennial with deep pink and burgundy leaves featuring visible veins, topped by delicate white flowers on tall stems above the vibrant foliage - Photo Property of Garden Crossings LLC.A cluster of Primo® 'Wild Rose' Coral Bells (Heuchera) leaves shows vibrant purple and pink shades with ruffled texture and distinct veins. Green and purple foliage from more Coral Bells appears in the background - Photo Property of Garden Crossings LLC. Decorative pot not included.

Primo® 'Wild Rose' Coral Bells (Heuchera)

$18.99
$18.99
A dense cluster of Rock 'N Grow® 'Tiramisu' Stonecrop (Sedum), a drought-tolerant succulent with thick green leaves and many small pinkish-red flowers, thrives outdoors in soil, its vibrant blossoms highlighted by sunlight - Photo Property of Garden Crossings LLC.Top-down view of small, pink and red flowers grow on dark stems amid dry mulch and soil, with some green leaves at the edges, making Rock 'N Grow® 'Tiramisu' Stonecrop (Sedum) - Photo Property of Garden Crossings LLC.

Rock 'N Grow® 'Tiramisu' Stonecrop (Sedum)

$18.99
$18.99
Close-up of Rockapulco® Appleblossom Double Impatiens, their delicate pink petals and rich green leaves create a vibrant, shade-loving displa - Photo Courtesy of Proven Winners, Inc.A rectangular metallic planter filled with lush green leaves and white-pink Rockapulco® Appleblossom Double Impatiens, some in full bloom and others budding - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Rockapulco® Appleblossom Double Impatiens

$10.99
$10.99

Close-up of vibrant pink Rockapulco® Coral Reef Double Impatiens, with lush green leaves and several unopened buds surrounding its double blooms - Photo Property of Garden Crossings LLC.Rockapulco® Coral Reef Double Impatiens bloom in bright pink, with lush green leaves, bringing vibrant color and beauty to any shade garden - Photo Property of Garden Crossings LLC.

Rockapulco® Coral Reef Double Impatiens

$10.99
$10.99

Rockapulco® Purple Double Impatiens display richly layered purple blooms amid soft-textured green leaves - Photo Property of Garden Crossings LLC.Close-up of Rockapulco® Purple Double Impatiens with vibrant double purple blooms - Photo Courtesy of Proven Winners, Inc.

Rockapulco® Purple Double Impatiens

$10.99
$10.99

A cluster of vibrant pink impatiens in full bloom, nestled among lush green leaves - Photo Courtesy of Proven Winners, Inc.A rectangular metal planter filled with lush foliage and vibrant red Rockapulco® Red Double Impatiens - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Rockapulco® Red Double Impatiens

$10.99
$10.99
Close-up of Rockapulco® Rose Double Impatiens features clusters of bright pink, ruffled blooms and deep green leaves - Photo Courtesy of Proven Winners, Inc.The Rockapulco® Rose Double Impatiens showcases abundant rose-like pink blooms and deep green foliage in a chic rectangular metallic pot - Photo Courtesy of Proven Winners, Inc. Decorative pot not included.

Rockapulco® Rose Double Impatiens

$10.99
$10.99

A vibrant planter displays Rockapulco® Tropical Shades Double Impatiens in pink and coral hues, surrounded by trailing lime-green foliage, nestled among other lush shade garden flowers at a garden center - Photo Property of Garden Crossings LLC. Decorative pot not included.A vibrant garden bed features clusters of pink-red Rockapulco® Tropical Shades Double Impatiens, classic shade garden flowers, nestled among lush green foliage, ferns, and small white blooms, all bordered by stone pavers - Photo Property of Garden Crossings LLC.

Rockapulco® Tropical Shades Double Impatiens

$10.99
$10.99
Close-up of Rockapulco® White Double Impatiens flowers in bloom, featuring green leaves and unopened buds next to open flowers. The delicate, layered white petals give the blossoms a full, textured look - Photo Property of Garden Crossings LLC.A close-up of a single Rockapulco® White Double Impatiens, featuring rose-like white double blooms with soft, layered petals nestled among dark green leaves - Photo Property of Garden Crossings LLC.

Rockapulco® White Double Impatiens

$10.99
$10.99

Rockapulco® Wisteria Double Impatiens features vibrant pink double blooms with white edges amid lush green foliage, offering a colorful display - Photo Property of Garden Crossings LLC.Close-up of Rockapulco® Wisteria Double Impatiens flowers with lush green leaves and buds. These vibrant double blooms have delicate purple veining, adding texture and rich color to shade garden containers - Photo Property of Garden Crossings LLC.

Rockapulco® Wisteria Double Impatiens

$10.99
$10.99