Identifying Weeds: Broad-leaved dock (Rumex obtusifolius)
Height x spread: 50-100 x 60cm (20-40 x 24in).
Leaves: Large, wavy, broad, coarse-textured, underside hairy, to 25cm (10in) long.
Flowers: Green to reddish, tiny but in large, branched spikes, late spring to autumn.
Other features: Seedlings often crimson. Resistant to most weedkillers. Perennial.