Cherry Lane has lovely rainbow chard, brussels sprouts, spinach, and salad greens, and is hoping for asparagus in a couple of weeks. Rogowski has beautiful baby carrots, stinging nettles, and other greens. Bodhitree has Bordeaux spinach and other unique greens and salads.
Bulich has several of their excellent mushroom varieties in "grab and go" bags as well as pick-your-own options. Madura has several greens as well as various good-looking mushrooms and potted plants.
River Garden has fresh flowers and flowering branches and Dutchmill is here with double daffodils and other unique Spring tulips. Duva also has tulips and there are beautiful orchid plants in the market as well.
To see these and other stands: Wednesday Greenmarket Union Square