>>That wouldn't account for curling and yellowing of leaves, though, Byron. He's talking about the tomato version of chile-leaf curl, a whitefly-transmitted geminivirus. I still would like some documentation for the comment that indeterminate tomato plants are more prone to nutritional stress, alleged by Ken Pernezney. Margaret L>> Margaret, here is the name and email address of Ken. Email him and see what he says. Pete Ken Pernezny klp@GNV.IFAS.UFL.EDU