how cold hardy are dwarf wisteria
Cold hardy, tropical trees and plants can give you that âislandâ feel all year long. In fact, a few cold hardy palms will grow as far north as the USDA plant hardiness zone 6, where winter lows dip to -10 F. (-23 C.).old hardy, tropical trees and plants can give you that âislandâ feel all year long. In fact, a few cold hardy palms will grow as far north as the USDA plant hardiness zone 6, where winter lows dip to -10 F. (-23 C.).