Pickerel weed Pontederia cordata

Status Non-native, invasive
Best Time to See

A non-native invasive plant.

This is a large aquatic plant grown for its broad, heart-shaped leaves and spikes of attractive blue flowers. It is extremely popular as a submerged or marginal plant in pools and ponds and as a bog plant and is very widely available.


Aquatic habitats

What's the problem?

The vigorous plants grow up to 1m tall and often out-grow their space in garden pools and ponds; they are then sometimes discarded into the wild and are found in lakes, ponds and flooded gravel pits. It is likely that some wild populations also arise by deliberate planting, for example by anglers inadvertently wanting to ‘improve’ fishing ponds. Although currently uncommon in the wild it is increasing.

Rapid Risk Assessment

**** Urgent Risk

Plantlife's position

Plantlife believes this species should be listed on Schedule 9 of the Wildlife and Countryside Act in England and Wales.