August 4, 2023 8.00 am This story is over 15 months old

Why Boston is clogged with duckweed – but Lincoln’s Brayford is still clear

Not all of the Witham has been covered this year

Duckweed is once again causing havoc on Lincolnshire’s waterways, with the river around Boston becoming so clogged that water events have been cancelled.

A thick spread of green across the Witham – often thick enough for ducks to walk on – has become a familiar sight in recent years.

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