The premise of this project is to start a conversation about the potential for plants to filter the air flow from underground networks that exist in our cities. The spaces in between subway tunnels and the sidewalk/street surface can be metaphorically perceived as membranes within our city, and some would argue that they are under-utilized. This particular experiment is situated in New York City.
Step 1: Materials for Prototype
These are the materials needed for the following how-to guide.
Step 2: Steps 1-9: Preparing the Fabric
The above images introduce the folding methods needed for creating a burlap circle.
Step 3: Steps 10-18: 'Sewing' the Fabric
Take the burlap circle and begin to puncture holes 2 inches into the circle, 2 inches apart. Although we used a zip-tie in this example, a single hole puncher is recommended (see last slide for further details).
Then, take the nylon twine and begin to ‘sew’ through each hole until the entire circle is complete.
Use your hand to hold the base of the circle down while pulling the excess nylon to create a sac.
Step 4: Steps 19-25: Inserting into the Subway Grate
In preparation for inserting the burlap sac into the subway grate, fold carefully and squeeze through one grate cell until the sac opens up underneath.
Keep a hold of the nylon while pouring soil. Then, squeeze the small plant through, add more soil, and some water. Lastly, tie the nylon to the grate.
Make note that several changes have been incorporated into the procedure for making and inserting this prototype. See next set of images for details.