Lepidium sativum. Fast-growing, frilly leaves leap out of the ground. A little cress really spices up a salad or sandwich. Plant a small amount of Curly Cress Peppergrass seeds frequently or grow indoors as microgreens in nearly any size of container. Curly Cress is a good seed to use in classroom settings because of its super sonic growth rate. The taste is mildly spicy and not too dissimilar to black pepper. It is a relative of both Watercress and the mustard family, and boasts a similar flavour profile. Cress is an incredibly rich source of vitamin C and K.