"What’s remarkable about all spontaneous urban plants is the fact that they require no human assistance to assert and maintain themselves in extreme, often volatile urban conditions, while providing the same ecologically performative benefits of traditional landscape plants and street trees. Rather than seek to discard and eradicate them, we now have an opportunity to harness their benefits and tell their histories."

Peter Del Tredici's plant site: "We vilify as weeds those organisms that flourish in the urban environment without our approval or assistance. It is these plants-the spontaneous vegetation of the urban environment-that are the subject of this website."

7 reasons to like grasscrete. SPOILERS: #7 is the best!