The value of dead leaves- Leaving leaves to be decomposed by frost and other weather action, and by worms, bacteria etc means that many valuable nutrients get recycled into the soil. Leaves also protect some insects from getting frosted, and thereby help insect-eaters like Wrens survive the coldest winter months. Their structure is also beautiful in frosty conditions like today. Conditions: Blue-skied and sunny after days of grey, wet and windy weather. Temperature: Max 3- Min -3C.