Architectural responses to sustainability often revolve around boundary‐pushing technology or adaptive algorithms. By giving form to the formless, Mossgrove highlights the biological intelligence of moss, an ancient ecological workhorse that holds immense potential as an architectural response to climate change. Through the strategic placement of reusable scaffolding posts, Mossgrove creates two clearings beneath a wood lattice. Moss‐treated biodegradable burlap is hung from the lattice to create a collage of various species, colors, and textures. By varying the size, depth, and density of the moss, the clearings can be tuned to be more or less porous to the park, allowing greater focus on programs within or connectivity to the park beyond.