Q: I was told I need chelated iron for my roses. So, per instructions, I added the granulated type today. My question is, how often do I do this? They do not mention this on the label, just the dosage ...

I was at one of your talks and heard you mention that "chelated iron" can kill weeds (specifically clover). I went to Highland Gardens, and their chelated iron is a nutrient supplement! Obviously, I ...