Great Water Dock (Rumex Hydrolapathum) is a perennial herb in the Polygonaceae family with moderate care difficulty. It requires high watering and full sun or partial shade light in USDA hardiness zones 6-9. This plant is safe for cats and dogs.

Rumex hydrolapathum is a perennial herbaceous plant commonly found in damp, boggy places, growing up to 2 meters tall with large, rigid broad lanceolate leaves.