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TumsAny Calcium based antacid will work. I have had to resort to this method a couple of times. I also found out you have to re-apply in a couple of weeks. Had not heard of the egg shells untill today. Makes sense though. I will be using that idea this year.

2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?