# Broad-Leaved Dock (*rumex obtusifolius*) The Broad-Leaved Dock (Rumex obtusifolius) is a highly resilient, perennial weed native to Europe but now widely naturalized across the globe. Known for its expansive, emerald leaves and tough, deep taproot, it is a familiar sight in pastures, roadsides, and disturbed soils. While gardeners often view it as a persistent agricultural weed, this hardy plant has a rich history in folk medicine, most famously as a natural soothing remedy for stinging nettle burns. Its ability to thrive in compacted, nutrient-rich soils makes it an ecological pioneer, preparing degraded land for subsequent plant successions. - **Category:** [Plants](https://www.snappit.app/explore/categories/plant) - **Rarity:** Common - **Danger:** 1/5 · Very low - **Snaps:** 4 - **Habitat:** Commonly found in disturbed grounds, agricultural fields, waste places, and damp meadows with nutrient-rich soils. ![Broad-Leaved Dock](https://inaturalist-open-data.s3.amazonaws.com/photos/5084024/medium.jpg) Photo: Andreas Rockstein, CC BY-SA 4.0 · [iNaturalist](https://www.inaturalist.org/photos/5084024) ## Appearance Broad-Leaved Dock is easily identified by its massive, oblong-ovate leaves that can reach up to 40 cm in length, featuring heart-shaped bases and slightly wavy margins. The plant grows from a dense basal rosette to produce tall, erect, reddish-green stems that branch near the top. In summer, it produces dense clusters of tiny green flowers that mature into distinctive, three-winged, reddish-brown dry fruits, each containing a single glossy seed. It typically stands between 60 to 150 cm tall. ## Taxonomy - **Kingdom:** Plantae - **Phylum:** Tracheophyta - **Class:** Magnoliopsida - **Order:** Caryophyllales - **Family:** Polygonaceae - **Genus:** Rumex ## Interesting facts - According to folklore, rubbing a crushed dock leaf on a stinging nettle sting helps neutralize the pain, a practice still widely used by hikers today. - Historically, the tough roots of the plant were used to extract a yellow dye for wool and other textiles. - The seeds of the broad-leaved dock can pass through the digestive systems of farm animals completely unharmed, helping the plant spread across pastures. ## Special abilities - **Deep Taproot Anchor:** Develops a massive, deep taproot that can penetrate over a meter into compacted soil, allowing it to access deep water reserves and survive harsh droughts. - **Chemical Defense Arsenal:** Leaves produce oxalic acid and tannins, which deter many generalist herbivores and give the foliage its signature bitter taste. - **Prolific Seed Bank:** A single mature plant can produce up to 60,000 seeds per year, which can remain viable in the soil for several decades waiting for the right conditions to germinate. ## Measurements & details - **Length:** 50-150 cm - **Weight:** 0.1-2 kg - **Lifespan:** 3-20 years ## Diet & Feeding As a photoautotrophic plant, it produces its own organic compounds through photosynthesis, utilizing sunlight, carbon dioxide, water, and soil minerals. - **Primary Foods:** Sunlight, Water, Carbon Dioxide, Nitrogen, Phosphorus, Potassium - **Foraging Method:** Photosynthesis ## Ecological connections - **Eaten by:** Green Dock Beetle (*Gastrophysa viridula*) — This beetle feeds heavily on the leaves of the broad-leaved dock, often skeletonizing them. - **Competitor:** Stinging Nettle (*Urtica dioica*) — Often found growing alongside nettles in similar nutrient-rich soils, sharing the same ecological niche. - **Eaten by:** [Ruby Tiger Moth](https://www.snappit.app/explore/ruby-tiger-moth) (*Phragmatobia fuliginosa*) — The caterpillars of this moth species use dock leaves as a primary larval food plant. ## Safety **Danger:** 1/5 · Very low No special safety notes yet. ## Frequently Asked Questions ### How to identify Broad-Leaved Dock? Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details. ### How long is Broad-Leaved Dock? 50-150 cm ### How much does Broad-Leaved Dock weigh? 0.1-2 kg ### How long does Broad-Leaved Dock live? 3-20 years ### What does Broad-Leaved Dock eat? As a photoautotrophic plant, it produces its own organic compounds through photosynthesis, utilizing sunlight, carbon dioxide, water, and soil minerals. ### Where is Broad-Leaved Dock usually found? Commonly found in disturbed grounds, agricultural fields, waste places, and damp meadows with nutrient-rich soils. ### How does Broad-Leaved Dock hunt? Photosynthesis ## Where to spot - [Awbury Arboretum](https://www.snappit.app/guides/places/awbury-arboretum) — Pennsylvania, US · Botanical Garden - [Capen-Clark Historic District](https://www.snappit.app/guides/places/capen-clark-historic-district) — Connecticut, US · Historic District - [Chantilly Park](https://www.snappit.app/guides/places/chantilly-park) — Virginia, US · Park - [Mill Creek Park](https://www.snappit.app/guides/places/mill-creek-park) — Ohio, US · Nature Reserve [View all places to see Broad-Leaved Dock](https://www.snappit.app/guides/where-to-see/broad-leaved-dock) ## More Plants - [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*) - [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*) - [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*) - [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*) --- Source: [Broad-Leaved Dock: Facts & Places to See — Snappit](https://www.snappit.app/explore/broad-leaved-dock)