There's an interesting little book "The Biodynamic Sowing and Planting Calendar 2006" by Maria & Matthias Thun (published by Floris Books ISSN 1478-1573) which I found at Irish Seed Savers, Scariff, Co. Clare, Ireland.

"The original biodynamic sowing and planting calendar, showing optimum days for sowing, pruning and harvesting various plant-crops, as well as for beekeeping.
Maria Thun and her son, Matthius, base this calendar on over forty years of research and experience."

Well worth getting hold of!