Any plant that regularly fails to thrive after a tough winter needs extra protection. You can use many of the same techniques that work for roses, for spring flowering hydrangeas that fail to bloom, as well as not-quite-hardy shrubs. Plants can be protected with wind screens, or cages stuffed with straw or leaves. Plants susceptible to branch break from heavy snow need special help. Tying branches together with heavy twine can be effective. For small plants, slatted structures allow good air flow while preventing crushing snow loads from building up.