The young leaves of garlic mustard weed are edible as salad greens and are high in vitamins A and C. Mustard weed was brought to America by early settlers, who used it as a spring potherb and to flavor other foods. The common name results from the faint garlic odor of the leaves when crushed. Although it may be an attractive plant and it is nutritious, it can take over a woodland area in a very short time, choking out other desirable native flora.

From The Old Farmer’s Almanac.