Water mint

Water mint facts

Scientific name: Mentha aquatica

Family: Lamiaceae

Origin: Native

Type: Perennial

Water mint and our canals

Water mint grows in shallow water and boggy places at the edges of canals, rivers, lakes and ponds. It can be easily identified by the characteristic minty smell that permeates the air around areas it grows, particularly early in the morning.

This perennial is beneficial for our canals as it acts as a natural filtration system by absorbing excess nutrients and pollutants from the water. Its roots can also remove toxic algae and heavy metals.

Appealing to bees and other pollinators, water mint encourages wildlife to our waterways and helps improve ecosystems. Butterfly species such as small tortoiseshell, peacock, and comma are big fans.

What does water mint look like?

Water mint has square stems that are usually green or purple, and produces striking clusters of pink flowers in summer. Its oval-shaped leaves grow across from one another and are often hairy. They also have toothed edges, meaning they appear jagged.

Can you use water mint in cooking?

Yes, water mint is a plant that can be foraged, and its best to do so from late spring. Its aromatic leaves can be used to flavour both food and drink. They can also be steeped (soaked) to make a herbal tea.

Where to find water mint

Water mint is found in damp habitats. It prefers shallower waters and boggy waterway banks.

When to see water mint

Look out for its pretty lilac flowers in the warmer months. During autumn and winter, water mint tends to become dormant.

Other plant species to look out for