One of permaculture’s hallmarks is polyculture: the mixed cultivation of a wide variety of bioregionally-appropriate species. In a process called “guild building”, permaculture designers select plants that will mutually enhance each others’ growth while providing their human stewards with a yield. In the classic Native American polyculture of maize, beans, and squash, for instance, the beans add nitrogen to the soil and use the corn stalks for support, while the squash act as a groundcover preventing weeds from competing with the other plants. The resulting yields of these “three sisters” are greater than if each were grown on their own.
Fortunately, a wealth of information exists in print and online for researching and selecting guilds – check out Plants For a Future and the University of Minnesota’s nursery database for starters. Still, this species information is spread across several websites, it’s difficult to sort through, and it’s rarely specific to the climate you’re in. As a result, guild building isn’t always as user-friendly as it ought to be.
In response to this challenge, I’ve begun the Atriplex Project – an attempt to create a comprehensive open-source database of useful plant species for Denver’s bioregion of the shortgrass steppe. Its current incarnation is a google spreadsheet that anyone can edit and export, although down the line it would be great to develop it into a more user-friendly standalone website.
Modeled after Dave Jacke’s exhaustive plant species matrix in the back of Edible Forest Gardens, Volume 2, Atriplex is sortable by climate zone, light/soil preferences, size, and a host of other attributes. So far I’ve got about 100 species listed, though not all have complete information. Because the google spreadsheet link is rather cumbersome, there’s a url alias at http://tinyurl.com/atriplex for your sharing convenience.
As an open-source document, I intend for Atriplex to eventually reflect the collective wisdom of all growers in this bioregion. The more data that comes from our direct experience, the more accurate and useful it will be. Here are a few ways you can help:
- If you’ve grown or observed any of the listed species, add locations to the “Local Examples” column.
- If you know of a reliable local source of a species (whether a nursery, a yard, or a wild patch) write it in the “Seed/stock Sources” column.
- If you have tips on how to grow or eat a species, or just want to give it a thumbs up/thumbs down, add your thoughts in the last column and be sure to write your name afterwards.
- If there’s something you think is missing from the list, add a new species by right-clicking on a number on the far left side and selecting “Insert 1 below”. No need to fill out every column or worry about the order.
Thanks for your support – and good luck guild-building!