Perennial Broccoli

I am truly excited, I have located a perennial broccoli from England. "Brassica oleracea Broccoli Nine Star Perennial" is a hardy over-wintering frost tolerant (to zone 0) creamy white broccoli which will produce for 2- years if you don't let it go to seed. Perfect for this Want-To-Be-Lazy-Gardener. Looks more like cauliflower, doesn't it? The heads bloom May through June. I found seeds at b-and-t-world-seeds, a French company.
I didn't find these seeds in the USA after a thorough search and although U.K. sites sold the seeds they were out of stock. My seeds are back-ordered for eight weeks. I also found sunchokes (Jerusalem artichokes) at their site and ordered them. This is ironic, because these are native to the North American continent but I hadn't been able to find them sold in the USA. I'm sure they're out there. Sunchokes taste delicious, but as they are a natural source of inulin (sugar similar to fructose) it takes a certain amount of intestinal fortitude to eat them. You could possibly power a car from the gas produced; my personal limit is one sunchoke.