Watercress
Nasturtium officianale cruciferaePerennialHt 20cm. Creeping aquatic plant, small green leaves and white flowers. Just keep it wet by standing in a larger pot or saucer of water and cut to use as required. It will spread and root in wet/damp areas if there's compost to root into.
Reviews
I have just placed another order for watercress after receiving one already. Having not grown it before I am hoping they will be successful. I have bought quite a few herbs from Pepperpot Nurseries and the quality and delivery is very good. In fact I would not buy any from anyhwere else.