Thanks for that clarification, Adam. In fact, what I’m experimenting with is ground dolomitic limestone. And I’m not using it simply because I think the plants I’m growing might need it. I’m experimenting to see if the presence of limestone will make a difference in the soil pathogens. Will limestone discourage our local soil pathogens – fusarium in particular? I’m trying to find out. Eventually I want to try gypsum, too: it will provide calcium and sulfur and not raise the pH, right? By the way, all but one of the big frits which were given the limestone treatment came out of the ground as fine, clean bulbs. Jim McKenney jimmckenney@jimmckenney.com Montgomery County, Maryland, USA, 39.03871º North, 77.09829º West, USDA zone 7, where the bulb sorting table is heaped with cleaned and wrapped bulbs. My Virtual Maryland Garden http://www.jimmckenney.com/ BLOG! http://mcwort.blogspot.com/ Webmaster Potomac Valley Chapter, NARGS Editor PVC Bulletin http://www.pvcnargs.org/ Webmaster Potomac Lily Society http://www.potomaclilysociety.org/