When should garlic be planted and what to do when it starts to grow? Getting rid of comfrey in the lawn. When can you start to reseed a lawn after using Roundup? How long do fruit trees live? Why would marigold leaves change colors? Why would rhubarb stalks start getting skinny? Keeping soil moist. The best place to plant hydrangeas. Why plants growing near a house could have trouble growing. Removing lily of the valley. Learn more from Master Gardener Teresa Rooney at extension.umn.edu.