Gronninger Blue Kale
Brought to our attention by Carol Deppe, who describes it as follows: "This is my new favorite kale of all time. The young plants produce a tremendous amount of biomass in a short time, and the entire plant is succulent. Excellent flavor planted in spring and used in summer or in July for harvest fall, winter, and spring. This is a Dutch heirloom that apparently has been grown primarily using the eat-all style for centuries. All the best characteristics of both a collard and a kale. Groninger overwinters well in both maritime Oregon and continental Canada. In the three years I have grown it it overwintered with no damage at all and made huge 6 foot high flowering bushes in spring. Grow for eat-all in beds from mid-spring on. Can also be grown with the same style as ordinary kale. (I thank William Dam Seeds for preserving this heirloom in Canada as part of their Dutch-Canadian heritage.)"