Juglans regia ‘Carpathian’ Carpathian Walnut Description The Carpathian Walnut is hardier than the English strain and far less bitter than our native Black Walnut. It is fast growing and should produce nuts well within a decade of planting. Plant two for good production. Seed grown. Tolerates clay. Sizes & Prices All Walnut Characteristics Hardiness Zone: 5 Light requirements: Sun Height: 60' Spread: 40' Native: No Sizes & Prices Size: 10 GALLON $189.98 Other Information Black Walnut Juglans nigra Zone: 3 Sun HT: 40-60' English or Persian Walnut Juglans regia Zone: 5 Sun HT: 60' Carpathian Walnut Juglans regia 'Carpathian' Zone: 5 Sun HT: 60'