In one of my very first games, I'd tried planting massive fields of crops. It was actually my first attempt at large-scale growing. This was also right after the Great Berry Nerf of 1.1, so I was trying other things to see what I could do to generate profits.
Long story short, I'd planted 200 melon seeds a bit late (the first batch got delayed because I forgot to water them on the day of the Luau), then forgot to water them again. They were one day away from being able to be harvested on the 28th. That was the last time I relied on manual watering. Lesson learned.