If you are lucky enough to have the New Exotic Plant Nursery on your farm, there seems to be a great glitch for it currently!
The link below shows the "Sneak Peek" we have for it, in case you have not received it yet. (It seems many of us haven't!)
Click link for details
It seems with the glitch that farmers are able to keep collecting items over and over! Water, Power, Fuel, Bottles.....etc!!!