Perennials That Need Dividing Every Few Years

Meet perennials that look their best when you divide the plants every two to three years.

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Photo By: Image courtesy of www.PerennialResource.com

Photo By: Image courtesy of www.PerennialResource.com

Photo By: Image courtesy of www.PerennialResource.com

Photo By: Image courtesy of www.PerennialResource.com

Photo By: Image courtesy of www.PerennialResource.com

Photo By: Image courtesy of www.PerennialResource.com

Photo By: Image courtesy of www.PerennialResource.com

Photo By: Image courtesy of www.PerennialResource.com

Keep Your Perennials Looking Fresh

If you've noticed some of your perennials have stopped producing flowers or are dying out, it may be time to divide them. Browse our list of the most common blooms that need dividing every two to three years. Please note that even though all of these perennials may benefit from more frequent division in ideal conditions, actual timing depends on your growing conditions and how fast the plants are growing.

Moonshine Yarrow

Achillea ‘Moonshine’ boasts lemon yellow blooms atop plants that reach 12 to 24 inches tall. If your yard is plagued with dry, lean or sandy soil, this is the bloomer for you. Deer and rabbits tend to leave yarrow alone. 'Moonshine' is hardy in Zones 3 to 8.

'Sunny Border Blue' Speedwell

Fuss-free and easy-growing, 'Sunny Border Blue' speedwell thrives with minimal care when tucked in average, well-drained soil. Flower buds appear in May and keep coming all season long if you faithfully remove spent blossom spikes. This speedwell is hardy in Zones 5 to 9.

Astilbe ‘Rise and Shine’

Dress up a shady, moist planting area with the feathery spikes of 'Rise and Shine' astilbe. The delicate-looking flowers belie this perennial’s tough features, including deer and rabbit resistance. Divide when clumps are overcrowded, which shouldn’t occur before the three-year mark in average conditions. Plants are hardy in zones 4 to 8.

Daisy May Shasta Daisy (Leucanthemum ‘Daisy Duke’)

If you’re a daisy lover, make room for this Shasta daisy. 'Daisy Duke' boasts an earlier start to the flowering season, and plants offer a compact form: 12 to 24 inches tall by 10 to 14 inches wide. Remove spent blooms and you’ll savor a second flower show in early autumn. Use 'Daisy Duke' in containers or beds, where plants are hardy in zones 5 to 9.

Heuchera ‘Plum Pudding’

Celebrate the beauty of colorful leaves by adding 'Plum Pudding' to your garden roster. Foliage blends shades of silver and purple that maintain a steady presence in planting beds all season long. Small flowers appear in late spring to early summer. Give 'Plum Pudding' full sun to part shade in Northern zones; provide afternoon shade in Southern areas. Plants are hardy in zones 4 to 9.

Creeping Phlox

Convert a rock garden or slope into a carpet of spring color by planting creeping phlox, also known as moss phlox. This groundcover prefers gritty, alkaline soils in full sun, which means it thrives in planting beds along concrete sidewalks or driveways. Flowers sparkle in spring and bring long-lasting color to the garden. After blooms fade, trim any dead or weak growth. Plants are hardy in zones 2 to 9.

Blanket Flower

Butterflies swarm blanket flower when it’s in full bloom, and 'Arizona Red Shades' is no exception. This tough perennial withstands drought once established and prefers gritty, lean soils. Remove spent blooms to encourage more flower buds to form. Plants are hardy in zones 3 to 10.

Monskhood

Lengthen your garden season by including monkshood in your planting areas. This purple-flowered perennial starts opening buds as frost is knocking at the garden gate—and keeps blooming through light frosts. Deer and rabbit dislike monkshood, which is poisonous to people if consumed. Plants can be slow to establish. Divide only when clumps are crowded, which shouldn’t occur before the three-year mark. Plants are hardy in zones 4 to 8.

'Jacob Cline' Bee Balm

Bumblebees, butterflies, hummingbirds and other pollinators can’t resist the red petals of this bee balm. 'Jacob Cline' boasts excellent resistance to powdery mildew, which typically plagues bee balm in late summer. Snip flowers for bouquets; savor blooms and leaves in herbal tea. 'Jacob Cline' blooms all season long and is hardy in zones 4 to 9.

'Presto' Tickseed

Tickseed is a native plant, which means it’s a snap to grow once it’s established. 'Presto' improves upon the true native with 2-inch-wide blooms that are semi- or fully double and make terrific additions to bouquets. Butterflies will definitely visit this perennial, which is hardy in Zones 4 to 9.

Pincushion Flower

Use pincushion flower to add eye-catching color to planting bed edges or containers. Give these butterfly-beckoning plants full sun with average soil. Remove spent flowers to extend the bloom period by encouraging more buds to form. 'Butterfly Blue' is hardy in zones 3 to 9.

Autumn Circus Tall Bearded Iris (Iris ‘Autumn Circus’)

Give your late spring garden a touch of hybrid beauty with the beautiful purple and white blooms of 'Autumn Circus' tall bearded iris. Site plants in full sun for the strongest flower show, and make sure soil drains well year-round. Fertilize iris in early spring, after flowers fade, and again in early fall. Plants are hardy in zones 3 to 10.

Painted Daisy

Painted daisy is a cinch to grow. Just give plants full sun and well-drained soil—then get ready for the flower show. Blooms appear in late spring to early summer; remove them to encourage more flowers. This perennial is a rabbit favorite, so take precautions to protect plants using netting or fences. Painted daisy is hardy in zones 3 to 7.

Beard-Tongue

A hummingbird favorite, beard-tongue is a native perennial that thrives in full sun. Plants crave well-drained soil and tolerate drought once established. Beard-tongue yields the best results in the garden when used in mass plantings. In colder zones, mulch plants lightly in late fall after the ground freezes. Beard-tongue is hardy in zones 3 to 8.