Both methods seek to sustain ecosystems, but biodynamic farmers follow
more stringent rules than those required for organic certification, and
also observe certain philosophical principles.

“Organic" agriculture was popularized by publisher J. I. Rodale
beginning in the 1940s. Organic farming rejects synthetic agricultural
chemicals in favour of natural soil amendments, manual weed control and
non-toxic pest management.

Biodynamic agriculture predates the organic movement by about 20 years.
Based on Austrian philosopher Rudolf Steiner's notion of the farm as
self-sustaining organism, biodynamic farming involves the use of
strictly formulated plant "preparations" and times operations to
coincide with lunar cycles.

To learn more, visit the Biodynamic Farming and Gardening Association
http://www.biodynamics.com, and look for the Demeter Certified
http://www.demeter-usa.org label.