How much sun does Curled Dock need?

Curled Dock grows best in part shade conditions.

When does Curled Dock bloom?

Curled Dock blooms in May, June, July, and August.

Where is Curled Dock native?

Curled Dock (Rumex crispus) is native to DE, per the USDA PLANTS Database and regional native plant society lists.

Is Curled Dock toxic to dogs?

Yes. Curled Dock is listed as toxic to dogs by the ASPCA Animal Poison Control Center (aspca.org). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.

Is Curled Dock toxic to cats?

Yes. Curled Dock is listed as toxic to cats by the ASPCA Animal Poison Control Center (aspca.org). If your cat has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.

Is Curled Dock HOA-friendly?

Curled Dock takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Curled Dock

Name: Pollinator Patch
Author: Pollinator Patch

Rumex crispus

Last reviewed: June 2026

Curled Dock is toxic to dogs and cats.

Listed as toxic by the ASPCA Animal Poison Control Center (opens in new tab) (last reviewed 2026-05-21). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435and your veterinarian's emergency line.

Pollinator Patch flags toxic plants so you can choose a pet-safe native alternative for your yard.

Light

part shade

Water

medium

Size

24"–48" H × 12"–24" W

Bloom

May, Jun, Jul, Aug

Native to

Browse plants for this ecoregion

Coast Range Sierra Nevada Central California Valley Central California Foothills and Coastal Mountains Southern California Mountains Central Basin and Range Mojave Basin and Range Chihuahuan Deserts Central Oklahoma/Texas Plains Edwards Plateau Texas Blackland Prairies East Central Texas Plains Western Gulf Coastal Plain South Central Plains Sonoran Basin and Range

Curled dock is a tall perennial herb with distinctive wavy-edged leaves and upright stems that produce clusters of small reddish-brown seeds. This hardy native plant grows 2-4 feet tall and tolerates various conditions, blooming from late spring through summer. The plant has a somewhat coarse, weedy appearance that makes it better suited for naturalized areas.

In an HOA neighborhood

Curled Dock takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Commonly considered a weed by many homeowners
Tall growth habit can look unkempt
Self-seeds readily and may spread

Wildlife value

The seeds provide food for birds and small mammals, while the foliage serves as host plant for some butterfly caterpillars. The long blooming period offers nectar for various small pollinators.

Common questions

How much sun does Curled Dock need?: Curled Dock grows best in part shade conditions.
When does Curled Dock bloom?: Curled Dock blooms in May, June, July, and August.
Where is Curled Dock native?: Curled Dock (Rumex crispus) is native to DE, per the USDA PLANTS Database and regional native plant society lists.
Is Curled Dock toxic to dogs?: Yes. Curled Dock is listed as toxic to dogs by the ASPCA Animal Poison Control Center (aspca.org). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
Is Curled Dock toxic to cats?: Yes. Curled Dock is listed as toxic to cats by the ASPCA Animal Poison Control Center (aspca.org). If your cat has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
Is Curled Dock HOA-friendly?: Curled Dock takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

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