AL_n wrote:
I've grown Wilko's curly kale for a few years now and found it very
reliable and tasty. Doesn't state the variety on the packet though.
Unfortunately the packet is now empty and I don't have access to Wilkos
any more. :-(

Thanks to all, for the suggestions. I have ordered a couple of types of
seeds: Cavolo de Nero and Red Russian.

I grew a few different ones last year, and red russian is the one that has held up best during hte winter - it's the one that is even now still producing edible leaves when all the rest are ready for feeding to the chickens.