SANTA ROSA, Calif.  Nonprofit arts groups tend to spend much of their time scrounging for grants and praying for corporate largesse. But one art foundation taking shape on 120 acres in the high oak chaparral of Sonoma County has different kinds of worries these days: spider mites, bud rot and the occasional low-flying surveillance visit from the local Sheriff’s Office.

This is because the foundation, called Life Is Art, recently began to reap a new kind of financing, in the form of tall, happy-looking marijuana plants. Late this month, with some help from the sale of its first small crop, grown under California’s liberal medical marijuana laws, the group plans to present an inaugural exhibition on its land, of sculpture and installation work by more than 20 visiting artists  some of whom will have helped bring in the harvest. The foundation’s hope is that income from succeeding crops will fully support such projects, in perpetuity, creating a kind of Marfa-meets-ganja art retreat north of San Francisco and a new economic engine for art philanthropy.

At a going wholesale rate of $200 or more an ounce in the Bay Area for high-quality medical marijuana, it’s a lot simpler than raising money the traditional way, the project’s organizers point out. And  except for the nagging fact that selling marijuana remains a crime under federal law  it even feels more honest to the people behind Life Is Art. They see it as a way of supporting the cause with physical labor and the fruits of the land instead of the wheedling of donors, an especially appealing prospect in an economy where raising money has become more difficult than ever.