Hi Diane, I don't think you have planted too closely and without looking at the plants I wouls expect that your garden center is correct. Bottom leaves regularly die and are discarded. Compare this with a tree. You may see shoots "suckers" emerging at tha base ot the dead leaves. If anything you may be over watering and over fertilizing. Too much water and Nitrogen will cause rampant foliage growth at the expense of fruit. Three weeks is certainly not an excessive time fruit to be present before ripening. Be patient M'lady. <G> You might want to check out the following web site and see if any diseases look familiar to you. >>http://aggie-horticulture.tamu.edu/imagemap/mgmaps/mgprob.html<< Good gardening, Chuck Wyatt