I read somewhere recently that cardboard has undesirable chemicals in its seemingly innocent paper plus makeup. I was going to use it, too, then changed to newspaper except in the paths where the cardboard will be fine. Wish I could tell you where to verify this info...Cheryl >When I finish digging the last 2 rows of potatoes today I'm planning on raking >the area level, adding a little more 10-10-10 fertilizer, perhaps a little >more >manure and covering the whole patch with cardboard and spoiled hay. Next >spring I'll move my strawberries to this spot. > >Terry King North Central Eastern Washington >taeking@televar.com USDA zone 4, Sunset Zone 1 Cheryl Schaefer, Schaefer Yarns Beautiful hand painted fibers schaefer@epix.net Zone 5 in the fabulous Finger Lakes of NY