The term “hardy” may leave you believe that all the shrubs and garden plants that perform year after year will withstand all weather conditions! In reality hardy garden plants refers to their durability to stand a range of temperate growing conditions.
Some years during a hard, prolonged period of sub zero tempertures you may be surprised to loose your favourite Ceanothus or Hebe. Biting cold freezing winds combined with frozen earth for days even weeks on end can bring about a the death of your choice plants demise. This great article explains how to provide Frost Protection for Garden Plants | The Forget-me-Not Cultivation Blog.