Why vertical farming specifically? No doubt vertical farming will form part of the solution to feeding urban populations in the coming decades, but the area covered by open-air "horizontal" farming is
immense. We just can't do construction on that scale, not to mention the incredible environmental impacts. Growing things with LEDs seems pretty wasteful when we have a great big star shining down on us all day. Vertical farming will bring fresh food to high-density populations for sure, it just isn't going to change the face of farming across the planet.
Although it's a much more difficult problem to solve being an uncontrolled environment, my company is working on this automation but for traditional farms (http://touch.farm). The first step is gathering rich data from different crops/climates, which is why we're starting by designing the cheapest and most usable ag sensors we can. If we can make sensor tech accessible to a wide range of farmers, we'll gain a rich enough dataset to start applying ML (and farmers and the environment win in the process).
tl;dr: vertical farming is great, but what we really need is innovation/investment in traditional farming.