Water-cress | Reserves and species

Scientific Name:

Rorippa nasturtium-aquaticum

Water-cress is an evergreen aquatic plant that grows in thick drifts in shallow, clear water (especially fast-flowing streams) all around the UK. Traditionally hand-picked from the wild as a useful salad addition, it became popular in the 18th century, and is now cultivated on a commercial scale.

How to identify:

Water-cress has green, divided leaves with rounded leaflets, and hollow stems which float on the surface of the water. Small white and green flowers appear in clusters from May to October.

Where to find it:

Grows in most parts of the UK, but is less in northern parts of Scotland. Cultivated on a wide scale.

How people can help:

Human activity, including the drainage of land for agriculture and development, has resulted in the disappearance of many of the UK's wetlands. The Wildlife Trusts are working closely with planners, developers and farmers to ensure our wetlands are protected. You can help too: add native plants and flowers to a wildlife-friendly pond and provide shelter for frogs and nectar for insects. In partnership with the RHS, The Wildlife Trusts' Wild About Gardens initiative can help you plan your wildlife garden.

Statistics:

Height: up to 60cm

Conservation status:

Common.

Did you know?:

Finding Water-cress growing in a stream is a sign of clean water as it does not tolerate pollution. However, if you wish to pick it wild, make sure it is well-washed before you add it to your salad. The leaves are a good source of vitamin C and this plant is the source of a number of medicines.

Seasons:

Spring

Summer

Autumn

Winter

When to see

Start date:

January

End date:

December

Image: