If a Grower wants Product delivered but doesn't specify any Farms or Fields, the rep can create a "No Farm" group on a crop plan.  First, in the Crop Plan Builder, click on Add Group.  

Then give the Group a name, select a group type of Farm, and click Next.  

Then select the None farm and click Apply.  

Now the "No Farm" group is created and is ready for Products to be added.