Community gardens here in the Seattle area are referred to as “p-patches” which I thought came simply from “pea patch” but they are actually named after the original local community garden, Picardo Farm. Now, there may be other community gardens in other places that are also called “pea patches” but a search turns up primarily greater Seattle area “pea” and “p” patches, so it’s likely the term did originate from this area, and perhaps with Picardo, not peas. We referred to our community garden in Connecticut by its location (Allen’s Meadows), so I can understand the “P-patch” derivation.