How to Grow Watercress Inside

Buy a bunch of watercress with roots on the stems. Separate the stems and select the ones with the most roots, which are stronger and will produce the best yield.

Make several drainage holes in the bottom of a deep plastic container with the tip of a sharp knife.

Fill the container with a half-and-half mix of store-bought compost and mature, homemade compost. Leave 3 inches between the top of the compost and the rim of the container.

Press the compost down with the palms of your hands.

Saturate the compost with water and let the container drain a little.

Make holes in the compost with a dibber that is just slightly larger than the size of the watercress stems. Leave 4 inches between each hole to give the watercress room to become established.

Insert the stems into the holes in the compost and press down the compost around each one with your fingertips.

Give the planted stems a thorough watering.

Place the container in a larger container or a deep tray filled with 3 inches of water. Place the container on a cool windowsill, out of direct sunlight.

Water the container every day to keep the compost wet. It is crucial that the compost does not dry out. Change the water in the bottom container or tray once per week.

Wait around four weeks to have well-established watercress plants that are producing new shoots.

Feed your established stems with a good-quality plant feed once every seven to 10 days. Keep watering your plants every day.

Cut or pinch off dark leaves at any time of the year.