- A local farm might sell fresh compost or chicken manure so that you can make your own. Find a farm on LocalHarvest.org
- Your garden center will probably sell Black Kow composted cow manure. A 50lb bag (10 square feet) is about $5. I haven't been able to find any bad reviews on the product. When I've used it I haven't a problem with weeds in my beds.
- Mushroom compost is very popular among my friends. A truck full runs about $10 and sometimes it's given away for free. It may be high in pesticides and it may not be completely composted, but it is an excellent humus.
(this is not the actual coop I couldn't find an image large enough, click the photo to see what I'm talking about).