Protecting Hydrangeas from Sun and Frost

• Planting your hydrangea in an area that is protected from direct, hot sun as well as frost is wise, according to the University of Rhode Island website. To protect a plant from frost, spread a 3- to 4-inch layer of mulch on the soil around your plant before the first frost occurs.
  
  

Wintering Hydrangeas

• Frost rarely damages the older, woody growth on hydrangeas, so many varieties will survive periods of winter cold. The University of Rhode Island website recommends placing a screen around your hydrangea before the mercury drops to 25 degrees Fahrenheit. Then fill the center of the enclosure with peat moss, bark or other insulating material.
  
  

Hardy Varieties

• If your winters are extremely cold, you can choose specific varieties of hydrangeas that are more tolerant of frost and snow. These include "Hills of Snow," "Pee Gee" and the climbing hydrangea.