Merritt Collards are a new perennial variety of collard greens that grow enormous leaves year after year. We have found them to be very vigorous plants with leaves over 2′ long and half a pound in weight. The mother plant was a chance seedling from Merritt College in Oakland. They are hardy to at least 25° Fahrenheit, maybe colder and are propagated by cuttings. They do have a tendency to flower in the spring. Ours are not currently showing signs of flowering, but your plants may produce flowers later in the spring. If so, let them flower and set some seeds, then remove the flower stalk and they will resume vigorous leaf growth. They tend to make a very strong central stalk, and are more compact than purple tree collards. The greens are delicious.