Plant/endless regrowth do not respect anti-regrowth rules.

In the game files, there are mechanics to stop world regrowth, primarily for trees/other trees spawning from nothing and a similar mechanic, but for things like rabbit holes in carrots in a 20 unit radius from any structure/wall. However, this does not apply to regrowth from trees spawning saplings from themselves, and the grass tufts/saplings/berry bushes and their variants from spawning. In particular the endless regrowth can spawn without checking for anything, and can result in it getting spawned into structures. In particular, this makes making creative builds exceedingly difficult to maintain without constantly chopping all of the trees or other resources  that will constantly generate if the build does not feature any man made flooring, which greatly limits options.

Below are 2 pictures, one after completing a build that was based in a forest, and the build after ~500 days,  neither of which involved me planting any pine cones of any kind, and only minor changes with the turf