Red watercress plant named ‘RW1’

The present invention relates to a new and distinct variety of watercress plant, and its plant parts, including the mutation of an allele of watercress designated “BWRW”, which results in watercress plants with red-pigmented leaves and/or stems. The red-green variety is distinguished from green watercress varieties, in particular with its red pigmentation ranging from dark purple to purple-grey to dark red to pink leaves and stems; intermediate-sized stem diameter ranging from 3.5 mm to 5.5 mm, which is commercially acceptable for both fresh and cooked consumption; a higher than average nutritional antioxidant capacity as measured by Ferric Reducing Ability of Plasma (FRAP) assays; as well as expanded harvesting seasons, with suitability to be grown in the United States year-round.