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A picture of a Onerow Yellowcress

Onerow Yellowcress

Nasturtium microphyllum

Also known as

One-rowed watercress, Watercress

Slanke waterkers bloeiwijze (Rorippa microphylla inflorescens) by Rasbak (CC-BY-SA-3.0)

Full Sun
Easy care
Frequent watering
Frost Hardy


RHS hardiness


Minimum temperature

Expected size








3 years to reach maturity


  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

More images of Onerow Yellowcress

A close up of some green Nasturtium microphyllum leaves and some small white flowers
Some Nasturtium microphyllum leaves

Onerow Yellowcress Overview

Nasturtium microphyllum is commonly known as Onerow Yellowcress, it is an aquatic, hardy perennial herb that is found naturally across Europe and Asia. It has been naturalised in areas of the US including Canada, Central America and Mexico as well as New Zealand and Australia. Flowers are small and delicate, coloured white-green and these are popular with pollinating insects. The natural habitat of this fast-growing perennial plant is in streams and it is a good indicator of water quality. It floats on the surface of water bodies due to hollow stem structures, foliage is pinnately divided and has a sharp, peppery taste.

Common problems with Onerow Yellowcress

Snails. Whiteflies and Spider mites are problems, but can be held in check by ladybirds.

Onerow Yellowcress Companion Plants

Grow alongside aquatic plants.

How to harvest Onerow Yellowcress

For fresh use, harvest watercress sprigs year round when they are 10 - 15 cm in length, aoubt 8 weeks after sowing. Simply cut the cress; the plant will send out new shoots soon. You can get up to 10 pickings a year. Leaves turn bitter once flowers start blooming.

How to propagate Onerow Yellowcress


The preferred method, because cultivated plants are prone to viruses. Sow the tiny seeds lightly in Spring, in wet, enriched soil. Germination in about 8 days.


Almost any part of the plant, even a single leaf, will form roots in ideal conditions - clean, slow flowing water, about 5cm deep.

Special features of Onerow Yellowcress

Crop rotation

Light feeder.

Wet sites

Watercress loves clear, running water, but is very adaptabe. Found in the wild in flooded areas. Ideal to plant in a water feature in the garden.

Pot plant

It will do well in a pot that stands in a container filled with water.

Attracts useful insects

Bees like the pollen-rich flowers. Host to beneficial spiders and beetles.

Repels harmful insects

Deters cucumber beetles.

Attractive flowers

Attractive leaves

Other uses of Onerow Yellowcress

Garden or ponds.


The sprouts, leaves and stems are used in countless ways in salads, sandwiches and cooked dishes. Nutritionally this plant is in the same league as spinach and cabbage.