Go to your first Sim's house and call over all of the sims. You must have garden patches for all of them, if not, most of them. You can move other garden patches from other houses to that house. Make them grow a crop such as onions (10 hours and $800). Exit out of the Sims Freeplay and go to settings, general, date & time and change "set automatically" to OFF. Click "Set Date & Time" and change the year to 1970. Double click the home button and close Sims Freeplay (tap the X). Open Sims Freeplay. After it has loaded exit it again and close it. Go back to setting and change "Set Automatically" to ON this time. Go back to your sims. They should be done growing their crops and might be sick.