How to grow Watercress at home

Home grown watercress
Growing watercress is actually very easy despite the myth that it needs flowing water in order to grow.
Watercress is a Health Food!
Watercress is not only a source of fiber but it is also high in vitamin C, and sooooo very easy to grow at home.
Watercress has a peppery taste which can be used in salads, as a garnish and even as a soup on it own.
In this article I will take you through the process of how easy it is to grow watercress at home.
The way I personally discovered how to grow watercress at home was a relatively simple one. I bought some freshly cut watercress which had roots on the stalks, and planted them… after all they are just plants like any other which grow.
Within a number of weeks I had and abundance of fresh watercress to put in sandwiches, salads fresh to eat without any previous knowledge of how to grow watercress. The time of the year was March began watercress growing was March.
So onto the main subject… how to grow watercress at home:
Step 1 – Find some watercress
The best place I have found to find/buy watercress from is from not your local supermarket, but from a farm shop or similar. I say this for two reasons:
- Its good to buy locally and support local shops
- They generally sell freshly cut watercress that still has roots on.
You can of course get your watercress from your local supermarket, but for me buying watercress locally i,e a farm shop or local market/veg supplier seemed a more the best way tp go for many reasons.
If you want to buy your watercress from a supermarket you may find that generally the cut watercress have less or no roots at all on the stems. (As it was pointed out to me in a comment below)… you can buy watercress by the bag from your local super market and place the watercress stems in jar of fresh water for a few days and change the water every day and discard any that turn yellow. In a short time you should find new roots appear. I have tried this and it does work from watercress bought from a supermarket.
However, for this article I got mine from a local farm shop as for me personally, I beleive these are the bst places to get any fruit or veg when available to help local business.
Ths is what a fresh bunch of watercress looks like bought from my local farm shop.

A bunch of Watercress
So, once you have found some watercress with roots on the stems (or used supermarket watercress and placed it in water for a few days), you will need to select the stalks that have roots – as these are the ones that you will be planting.

Select Stalks with roots
Try and select the stems with the most roots. These will be you main stems for planting as they will be the strongest and you will get far better results. But even stems that only have small roots are still worth planting. I have had a lot of success with planting cut watercress stems with few or small roots. They just take a little longer to establish.
Step 3 – Find a suitable container and fill it with rich compost
The container pictured below is one I had lying around. Any deep plastic container will do even a bucket, but try and use a plastic container as terracotta for example will dry out too quickly. Just make sure your container has some drainage holes in the bottom to prevent the damp compost going stagnant. If the container cannot drain, then your watercress will not grow but will rot instead. In the container below, I drilled about 10 holes 5mm in width to allow for water drainage.
Once you have a deep container with drainage holes, you will need to fill it with some compost. Watercress grows naturally in flowing streams. Flowing streams provide a constant supply of fresh minerals and food for the watercress to grow, so I used half and half mix of shop bought compost and well rotted home made compost which is rich in nitrogen and nutrients. Basically watercress will grow in any compost (I have tried). As long as the compost is rich in nutrients, you can’t go far wrong. Once you have mixed your compost and filled your container, try and leave at least 3-4 inches from the top of the compost to the rim of the container as this will help contain your growing watercress.
Firm the compost down and give it a REALLY good water… until the compost is literally saturated.

Use a deep plastic container with rich compost
Step 4 – Planting your Watercress
Once your container has drained a little but still very wet, you can plant out your selected watercress stems.
Use a dibber a little larger than the size of the watercress stems to make holes in the compost.

Use a dibber to make holes in the compost

Planting Watercress

Gently firm the compost around the stem
Repeat making holes and inserting your watercress stems into the wet compost. When established, each watercress stem will take up a lot more space, so in this container I planted each stem about 4 inches (9-10cm) apart.

All planted for this container

Water the planted stems well
Step 5 – After Planting Watercress
After the stems have been planted and watered in, I placed the container in a cool and shady spot out of the sun.
You will probably find that soon after planting, the stems will have wilted… but do not despair! this is only temporary. After I planted mine and saw that they had wilted, I gave them some more water.. after all watercress naturally grows in flowing streams.

After planting - the stems do wilt
Water the container everyday to keep the compost wet. I used rainwater from a water butt, but tap water will do.
Step 6 – Established Watercress Plants
Providing your watercress stems had healthy roots, and you have kept the compost damp, you should after about 4-5 weeks have well established watercress plants.

About 4-5 weeks after planting the stems
Step 7 – Looking after your watercress
When and only when, the watercress stems have established themselves into growing plants and are producing new shoots should you begin to feed them. I used miracle grow as per the instructions on the packet, but any good quality plant feed should be fine. Feeding once a week or every 10 days should suffice, just remember to WATER your plants every day to keep the compost damp. IMPORTANT Watercress does not like stale or stagnant water.
Step 8 – Keeping your Watercress growing
Like most plants at some point they will produce flowers and watercress will also do the same. If your plants are healthy, you may notice that in time (once your watercress plants are established and you plants have been growing well and you have been reaping the rewards by cutting shoots regularlary), that the leaves become smaller and you may begin to see small buds forming… sorry I dont have photo’s but hope to soon. If you see any one of these two things… this is what is going on.
- Your Watercress has is lacking in nutriments – your have not fed it enough.
- Your plants are wanting to produce flowers and goto seed.
- If your watercress plants are flowering, a way to stop this is to pick off the flowers to encourage more growth.
- Or let your watercress goto seed and wait for the seed pods to ripen, dry the pods (hope to have photos later) and then collect the seeds for next years sowing. After all watercress produces seeds just like any other plant.
Good luck in growing your very own watercress at home.. it really is very easy.
There is no need to buy watercress with roots on, buy an ordinary bunch and place it in a bowl of fresh clean water – after a couple of days roots will develop. Discard any that turn yellow or do not root and plant the rest.
Thank you for great info about growing watercress… a subject I was most curious to learn about! Because you took the time to include the fabulous photos as well as detailed descriptions of each step, I feel confident enough to give this a try!