Green Dock
Rumex conglomeratus
Last reviewed: June 2026
Green Dock is toxic to dogs and cats.
Listed as toxic by the ASPCA Animal Poison Control Center (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
full sun
Water
medium
Size
12"–48" H × 12"–24" W
Bloom
Jun, Jul, Aug, Sep
Native to
IN
Pollinators
beetles, flies
Browse plants for this ecoregion
Green dock is a tall perennial forb that grows in upright clumps with broad leaves and produces small greenish flowers on tall spikes from summer through early fall. This European native has naturalized widely but can spread aggressively and may be considered weedy in maintained landscapes. It tolerates a wide range of conditions but prefers moist soils.
In an HOA neighborhood
Green 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.
- Considered weedy and can spread aggressively
- Non-native species that may be viewed as undesirable
- Tall growth habit may look unkempt in formal settings
Wildlife value
The small flowers attract beetles and flies during the long summer blooming period. Seeds provide food for birds, though the plant's weedy nature limits its desirability in formal wildlife gardens.
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.
Pollinator Patch flags toxic plants like Green Dock and shows pet-safe natives for your ecoregion instead.