· Premium Member
Shortly after Greg Watson began selling dry fertilizers he offered CSM+B with extra iron mixed in to double the amount of iron. After a short time he found that the extra iron was of no benefit, so he dropped that product. I bought my CSM+B plus extra iron from him when he was still selling it and that is all I have used since then. I only do so because I'm too cheap to toss out perfectly good trace element mix. My opinion is that you don't need extra iron, but it also doesn't do any harm if you use it.