I'm not the slightest bit surprised by the results, or lack thereof depending on one's perspective. As I mentioned earlier, the only evidence it works required generated electricity, there is simply no real evidence that it works without that. Agriculture is massively important, huge industries world-wide, growing literally everything edible, in every way possible. Millions of dollars every year around the world is poured into experimenting and innovation, trying to find better things to grow, and better ways to grow them. If there was anything other than pseudoscience behind electroculture, big ag would be all over it and there'd be copper wires all over every farm, but there's not, because it doesn't work. Not effectively and definitely not efficiently anyway. Rig up an electrical supply from batteries or solar, there's a miniscule improvement in plant production, enough to scientifically measure, not enough for any plant producer of any kind to even consider. It does do one thing effectively though: it sells. It sells copper. It sells books. It sells videos. It sells written articles. And most lucrative of all, it sells advertisement opportunities.