At the beginning, two farms can provide a winery with what it needs, but if the winery is of high level, it depends on the efficiency of the farm. Generally speaking, three sugar fields with 200 efficiency can be used by two fully upgraded wineries.
Secondly, it depends on transportation efficiency. If the transportation efficiency is low, it will also lead to insufficient resources of the winery. Remember to check whether there are enough workers on the farm.
Then there is the reason for the export. Many players are still exporting sucrose after the farm is built, resulting in many resources of the farm going to the export end. Here, turn off the sugar outlet.