It's hard to exaggerate the stalwart hardiness of this 19th century French heirloom. Indifferent to cold, the plants will happily overwinter in Vermont. True blue-green, the very large 15-20" tall stalks turn still bluer as the weather gets colder. It's sweet, mild and flavorful. Perennial, Zone 7 or warmer, 5 plants shipped in bare root.