The only thing I have had trouble getting to sprout were Yukon Gold potatoes. Monocrop bent, I wanted to fill out the row, so bought some at a supermarket. Wish I could remember which one. That part of the row was essentially dead all summer, and when I dug the rest of the row, I dug in that area, and there lay the seed potatoes, covered with aborted sprouts. Margaret L >Garden catalogs and posts in garden newsgroups often caution against using >garlic bulbs, potatoes or sweet potatoes from supermarkets alleging the >produce is sprayed with a retardant to prevent sprouting. I have using >supermarket produce in the garden for decades with no problems which leads >me to believe the retardant spraying practice exists more in the minds of >the seed suppliers than in the supermarket produce, > >Olin >