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How to Plant Watercress in a Pond (Care & Grow Guide)

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Watercress, botanically known as Nasturtium officinale, belongs to the cabbage family of the Brassicaceae family.

It is an aquatic flowering plant commonly found growing in moist soil or shallow water. Watercress may grow 6-15 inches in height. This aquatic pond plant comes in handy in giving a lighter look to your pond edges, streambeds, or creek, thanks to its small, green, and white flowers.

Watercress is known for its rapid growth, especially in full to partial sun with shallow water at its roots. You will get hardy Watercress when you plant it in loam soil around zones 6 to 11.

One of the many benefits of Watercress is its health benefits. And we're not talking about just pond health. The leaves and sprouts of this plant are edible and are considered one of the healthiest vegetables in the world.

How to Plant Watercress in a Pond (Care & Grow Guide)
True Watercress - Twin Pack of 500 Seeds Each - Non-GMO

True Watercress - Twin Pack of 500 Seeds Each - Non-GMO

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Watercress Quick Look

Common Names

Watercress, Nasturtium officinale

Plant Type

Aquatic or semi-aquatic plant

Light Requirements

Full Sun to Partial Shade

Hardiness Zones

USDA 6-11

Bloom

Spring to late fall

Grow Up To

6 to 24 inches high

Flower Color

White

How To Plant Watercress In A Pond

You can either plant the seeds or the already established Watercress plants. For the seeds, all you have to do is place them in damp soil up to 2 inches deep (roughly 5cm).

If you are planting established plants, place them in sufficient saturated soil so that the roots and about an inch of the stem are covered. Alternatively, you can place them in water, with up to half of the stem submerged. The submerged roots (in water) should be covered with substrate and rocks to ensure that pond fish don’t dig them up and feed on them.

Watercress Care Guide

Considering the rapid growth and spread of this aquatic plant, it is best to trim them back to avoid overgrowth. Ensure the clippings and fallen flowers and leaves are removed from your pond or water garden to keep it clean and healthy.

You will notice a loss of foliage in the Nasturtiums as Autumn approaches. The remaining parts of the plant will overwinter and resprout when Spring approaches. For plants in milder regions, they will most likely continue their flowering and fruiting cycle, especially when the temperatures stay above approximately 50° F (10° C).

True Watercress - Twin Pack of 500 Seeds Each - Non-GMO

True Watercress - Twin Pack of 500 Seeds Each - Non-GMO

Price:
Buy Now on Amazon

Clicking this link to make a purchase may earn us a commission at no additional cost to you.

FAQs

Where does Watercress grow best?

Although Watercress can grow well in sunny conditions, they prefer a light shade condition. All you have to do, in either case, is ensure the compost or soil remains wet all year round. You can also plant them in a container sitting in a deep saucer filled with water.

Is Watercress an oxygenating plant?

Yes, Watercress is classified as one of the best oxygenating pond plants around. This is due to its large amount of underwater foliage, which releases oxygen and soaks up impurities.

Does Watercress need full sun?

Watercress grows best in full sun to partial shade conditions.