Nasturtium Species, Watercress, Yellowcress

For food source you must grow in closed, wet environment to keep bugs out, also snails and slugs out. Heat up the soil to certain temper...Read Moreature can kill the bugs eggs to have cleaned soil for planting use. Seal the container with cleaned soil with clean tap water. The plant source can be from supermarket cuttings that grow in clean water indoors first. Clean the rough stems (after removing the tender part) several times with running water to clean off possible bugs, snails and slugs eggs. Plant the cleaned stems in prepared container. Bag the whole container with clear plastic. This plant is very cold hardy and can be harvest all year around.

Easily grown from seed in a sealed container with a medium of hardwood compost. Plants should be kept continuously wet, raising the level...Read More of standing water in the container as they grow taller. Plants appreciate partial sun.

Be advised that growing watercress this way invites a mosquito farm in your container. Treat with a periodic teaspoonful of "Mosquito Bits" or equivalent dried Bacillus thuringiensis product to kill the larvae without the use of harmful chemicals.

If you grow this, please make sure that it doesn't get into natural wetlands.

Connecticut has banned the trade, transport,...Read More or planting of this species due to its invasiveness. It's a threat to wetlands and a species of concern to organizations dealing with the environment over a big chunk of the US.

Do be careful if you harvest from the wild that you don't get any watercress with snails in it. They love it and they aren't healthy to eat after!