I built a greenhouse with several fertilized garden plots, and installed some sprinklers and tiny borders/divides to put lights in. The plants would do find in some plots, but in several the plants were not growing at all! The weeds would pop up, and hovering over would indicate they were healthy, but no leaves would show. After several days of waiting with nothing, I composted and tried again, but with no luck, until I removed the sprinklers, divides, and lights that were nearby and on the same square of land. I only found one forum topic on the subject, which just advised to check any hacks or custom content you may have installed. But since they started appearing after I removed the objects nearby, I don’t think custom content is the problem. And I don’t have any hacks (or cheats activated).