We live borderline of zones 5&6. Our horseradish is one of the first things to pop up in the spring. We grind our roots to use on ham and our eggs for our Easter breakfast. I had always heard that you should grind the roots only in the spring before the leaves grow. Why can't you do it other times of the year? Would it be less potent? I'd love to whip up a few batches and sell it at our farmer's market.