Docks are the most serious grassland weed problem in Europe from an economic perspective. A heavy infestation of docks can reduce grass production by up to 40%. Their broad leaves block sunlight from nearby grasses and they also use up valuable nutrients which the grasses could otherwise use. Mature docks are a hazard for baled silage as their strong stems can puncture bale wrapping, causing waste of valuable silage.
Cattle and sheep will eat docks which have about 70% of the nutrition value of grass.
However, a controlled population of docks has several benefits: