The furthest north that the Greater Water Parsnip currently grows is in the Lower Derwent Valley National Nature Reserve, to the south of York.
Riwilo Masulani, a biodiversity officer for the Environment Agency, said: "If we are successful in reintroducing the Greater Water Parsnip, it will help to improve the diversity of plants in the area which in turn will help to attract new plant species and wildlife.
The agency has been working with Natural England to reintroduce the Greater Water Parsnip on to Newham Fen.
The Greater Water Parsnip is found in wet ditches and marshes, growing in shallow, still or slow moving water.
Biodiversity experts are planning to reintroduce the rare and endangered Greater Water Parsnip to Northumberland.