Super Focused Farming Potion

It's possible to imagine a super-focused angler or lumberjack, but a super-focused farmer? How much more can they get from a farming patch?

A super-focused farmer is a disconcerting beast. They will sit at the corner of a farming patch, staring intensely at a seed, willing it to grow. They will do this for hours, even days, depending on the dosage. I'm not sure if the plant feels self-conscious or a little guilty, but it works: the plant does actually grow at a faster rate.