What can a gardener do when we are in the middle of a cold winter? Spider plant problems. When to start fertilizing house plants. Debunking the exploding tree myth. Can streetlights impact plant growth? When is it too late to prune trees? Growing berries in Minnesota. Cutting back geraniums. Growing and caring for amaryllis plants. Recommended weed barriers. How to grow pineapple. Learn more from horticulturalist Laura Irish Hanson extension.umn.edu.