[lIIllIIllIIllII]

what you probably need is just more vegetation, and vegetation that is naturally suitable for the climate/microclimate, that will grow... naturally and without the need for upkeep.

Like, if nature itself needs upkeep, something other than lack of upkeep is the issue.

[ssl-3]

It still needs manual upkeep. Nature has a way of planting things that don't even necessarily belong on the same continent in spaces where they are undesirable.

See, for example: Kudzu. We introduced it intentionally, and nature's own mechanisms have it literally growing beyond control -- blanketing (and typically killing) anything in its path in the US South, including mature trees.