Guerilla Gardening Installation Art?

Guerilla gardening has become a fairly popular concept. It is this impromptu beneficial form of trespassing that was the precursor to many community garden programs. Nearly every DIY book nowadays has instructions for making seed bombs (soil balls filled with seeds for tossing somewhere you want the seeds to grow). This, however, brings together street art with guerilla gardening, which heretofore were fairly distinct forms.

Amazing!