16 Top Filler Plants

This foliage favorite brings a blend of pink, burgundy and green to containers. Expect plants to reach about 18 inches tall by 30 inches wide — an ideal size for giving a pot a lush, full look. Designed to brighten shade, this beauty also puts on a show in a sunny spot in cooler summers.

Make strawflower your go-to bloomer for heat- and drought-tolerant beauty. Orange papery petals surround gold centers. Plants grow 10 to 14 inches tall and wide, spreading neatly to fill out container designs. Snip flowers for bouquets or air drying.

For non-stop flowers, choose this lushly petaled zinnia. Deep rose blossoms blanket plants all summer long and never need deadheading. Flowers make nice additions to bouquets and beckon butterflies. Expect plants to reach 16 to 20 inches tall and wide.

Bronze tinted grass like leaves give this plant a striking appearance and textural appeal. This sedge can fill the role of filler with larger plants, or you can use it as a thriller by pairing it with spiller plants. ‘Toffee Twist’ grows 18 to 24 inches tall and wide and is winter-hardy to Zone 7. At the end of the growing season, lift plants from the pot and tuck into a planting bed for winter, then shift back to a pot the next year.