Bitter cold weather is no fun for us to live through, we bundle up, we run our heaters, we stoke our fires and we shiver. As gardeners however we are lucky, this bitter weather is what helps kill off pest insects.
Many insects that bother our plants during the season are living very close to your garden right now. They live under leaf litter or buried under the soil. Long periods of cold helps to freeze these insects, their eggs and their larve. Lower numbers result in less of an issue for the upcoming season. Mild winters result in large populations of pests and damaged crops.
So put on a heavy coat, and be thankful the weather is doing some good for our gardens!