What is the maximum number of potatoes you could grow in your house or on property you own before it becomes a crime?

You know how cops are always busting people with houses full of marijuana plants? What if you did all of that but with potatoes instead of marijuana? What if you had an entire house full of grow lights and potato plants in buckets and then every inch of lawn on your property had potatoes and not a single blade of grass?

Would anyone care? Would the cops come along and put a stop to it? If not, how many more potatoes would you have to grow before something like that happened?