I, too, cast my lot with the minimal-care-whenever-lot.
Planting on Friday, feeding Monday when I get back from work, harvesting on Thursday when I get back from work. In between I don't look at them at all ('though I do watch over each once directly after planting).
Since all characters are treated them same, I get a broad range of results while the variables stay the same (seed, day, moon phase, care and feeding given).
I my experience, I get phenomenal results as well as abyssal results during the same harvesting period. It's mostly a matter of chance and luck.