GardenWizzPlant Care Card

Broadleaf Dock

Rumex obtusifolius · Perennial

Hardiness
H7 Very hardy (to below −20°C)
Position
Full sun, Partial shade
Height × Spread
40–150 cm × —
Soil
Poorly–drained, Well–drained; pH Acid, Alkaline, Neutral
Flowering
June–September
Toxicity
Harmful if eaten in large amounts. Wear gloves and other protective equipment when handling

The Gardening Year

J
F
M
A
M
J
J
A
S
O
N
D
🌸 In flower
✂️ Prune

Watch out for

Slugs and snails: Use beer traps, copper tape barriers, or iron phosphate-based pellets to reduce populations.

Aphids: Spray off with a strong jet of water or apply insecticidal soap; encourage ladybirds for natural control.

Root regeneration: Remove the top 12-15cm of root system completely; hoe seedlings on dry days to desiccate roots.

Self-seeding spread: Deadhead flower spikes before seeds ripen or cut back plants prior to seed setting.

Full guide: gardenwizz.com/plants/rumex-obtusifolius © GardenWizz — UK gardening encyclopedia