Why are my crops randomly dying?

[Huillam]

It's a minor annoyance when it's a crop but today it was one of my trees.
The grass was perfectly aligned: it shouldn't be me going crazy and remembering a tree where it wasn't.
The health of the soil is way above 0.
I'm (mostly) sure crops that turned into grass were properly watered.
No typhoon recently.

[xAlphaStarOmegax]

Try using No Rot, and till in either Clovers or Corn.

[𝕰𝖙𝖊𝖗𝖓𝖆]

If your crops looks dark just poor some water and they will return to normal. But! Make sure you fertilizer your field as most be low in health. Use Greenifier and withered grass which you can apply directly to the soil by using the hoe. You can also use a fertilizer bin and add as many grass as you can, that will do.