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Spring Gathering 2025 “Light Into Darkness” at Heartwood Farms


  • Biodynamic Association of Northern California PO Box 1702 Nevada City, CA 95959 USA (map)

Join us for this year's Spring 2025 BDANC gathering exploring Light: What is light? What is the relationship of light to darkness? How do we work with the phenomena of light in our agricultural practice?  How does light transform into fruit? Ehrenfreid Pfeiffer, bearer of Biodynamics to North America, recounts that the word “biodynamic”  was chosen by the initial group of experimenting farmers 100 years ago as meaning, “a working with the energies which maintain life.”  He goes on to point out that the biological aspect began to reveal itself in science in the first half of the 20th century, yet,  “Despite recognition of the importance of the biological conditions of ecological relationships…all of this still gives no answer to the question of energy, to its source…the dynamic side still waits understanding to which Rudolph Steiner pointed the way.”

This weekend offers sense perception and experience based inquiry into the role of light in human capacities and Biodynamic farming practices. Particular attention will be brought to the use of the Horn Silica and Horn Manure preparations, their polarities and how they complement one another. Practical work will include making Horn Silica and applying it to the land. Horn Manure and other winter buried preparations will be dug up and observed. The weekend's work together will be participatory and accessible to all levels of experience. 

We are excited to return for the second year to Heartwood Farms' cherry and walnut orchards for the Spring Meeting 2025. Program Lead by Franz Eilers, Emma Wade, Sebastian Dupuis, Lilith Dupuis, and Harald Hoven.

When: Saturday April 26 & Sunday April 27th / Where: Heartwood Farms, 21355 E Walnut Dr. Linden Ca, 95236

Food: Saturday lunch is the ever amazing pot luck of everyone’s offerings. Please bring a dish to serve at least 4 people, your own cutlery, plate, cup and bowl. Dinner and Sunday breakfast are provided catered for purchase and must be pre-reserved by TUESDAY April 22nd.  

Please take your RSVP seriously, it helps organizers prepare the facilities and meals! 

Program Schedule

Saturday April 26

9:00 am Digging up Heartwood's buried biodynamic preparations with Harald Hoven & Franz Eilers 

9:30 am Check-in with Coffee & Tea 

10:00 am Opening Circle & Eurythmy with Sebastien Dupuis 

11:00 am  Exploration of Inner and Outer Light with Lilith Dupuis & Emma Wade

1:00 pm Pot Luck Lunch / Table Talk 

        Table for: 

         Farmers 

         Garden Teachers/Educators  

         Farm Apprenticeships

2:30 pm BD Preparation Making - Horn Silica with Harald Hoven

4:00 pm How do we work with the phenomena of light in using biodynamic preparations? With Sebastien Dupuis, Lilith Dupuis & Franz Eilers

6:00 pm Dinner & Campfire

7:30 pm Games for Embodying Nature and Nurturing Inner Light with Emma Wade

9:00 pm Woodfired Sauna 

Sunday April 27

5:00 am Large & Small Scale Silica Stir with Sebastien Dupuis & Franz Eilers 

6:15 am Sunrise Silica Spray 

8:00 am  Breakfast / Breakout Group Table Talk Continued  

9:30 Closing Circle: What lit up for you? 

Invitation to stay after and help out on the farm for an hour or two.