Herbicide

Corn Gluten Meal

Q. I have seen corn gluten meal sold as a pre-emergent herbicide. What can you tell me about it?

Herbicide Damage

Q. While spraying a weedy patch with Roundup, I inadvertently exposed some evergreens to the herbicide, and now quite a few of them have brown needles. Can I restore these plants?

Getting rid of crabgrass

Q. What is the best way to get rid of crabgrass?