At first where are you from? Where do you plan to run that business? Where do you plan to export that? Or you only include local area? The reason why I ask this is that for example Turkey is a great country for such business, workers are very cheap, area is cheap too and in overall Turkey exports fruits and vegetables in a lot of countries.
Well, this is the most serious thing to discuss in this business and we can't just decide everything with one proposal but I have one question, why did you use word blockchain there? Don't include this word in every subject to make things look innovative, no, there is no need of blockchain in your idea right now and it does nothing beneficial too for this.