ruderal
That grows in rubbish or poor soil.
Rafinesque perfected his variant of this honorable philosophy while botanizing in the literal backyards of my childhood, examining ruderal plants I've known all my life, and so I have appropriated it from him, with minor tweaks.
Where it comes from
Borrowed from New Latin rūderālis, from Latin rūdus (“rubble”).
Adapted from the Wiktionary entry ruderal (CC BY-SA 4.0).