The Garden (Scott Hamilton Kennedy, 2008)
Loved this also. This was Oscar-nominated so should be easy to find. Begins with footage of LA riots in '92, and tells how as a result the largest community garden in the US was founded in the heart of its most concrete city, mainly to appease the community. 14 years later, gardens and community are both flourishing, so of course the property developer who actually owns the land comes in and decides he's going to flatten it to build warehouses. 247 Campesino families will be evicted unless they can raise $60M in 60 days. Throw in some decidedly dodgy political shenanigans, and you have the makings of one of the great David v Goliath docs. And it really is beautifully constructed so that you're cheering on the immigrant farmers, jeering at The Man and the politicos, and outraged and the greed, corruption and ultimately sheer spite that blight them at every turn. The Garden stands as a great piece of investigative journalism when it starts digging (geddit?) further into the backroom deals, and allows the key players to condemn themselves with their own words. But more than that, it's a rousing, inspiring document of a community banding together (despite, most tragically, at one point being forced to fight within themselves in order not to be punished by the system) in the face of incredible pressures and injustice.
Co-starring Zack de la Rocha, Daryl Hannah, and most hilariously, Dennis Kucinich.