How cold is too cold? Pansy and Viola flowers are known to be able to handle temperatures down to 26 F. Although those temperatures are rare in April, I would advise people to protect spring flowers if temperatures are going to fall below 28 F especially if windy. Other spring flowers such as Snap Dragons, Allysum, Stock, and Dusty Miller can handle a light frost but don’t handle being froze down very well. If the night time temperature is expected to fall below freezing for more than several hours I advise some kind of frost protection, but it is all depends on how much you are willing to gamble.
Spring Flower Cold Tolerance
