EARTHseed Farm is unlike its counterparts among Sonoma County’s rolling vineyards and redwood forests. A hand-painted sign at the entrance greets visitors with the words, “Welcome Black to the land.” … The Afrocentricity that radiates across EARTHseed is meant to make Black visitors in particular feel welcome … For the farm’s founder, Pandora Thomas, there’s an even greater purpose. Thomas, a Berkeley-based naturalist and environmental educator, wants to teach her fellow Black Californians to use their African American heritage to usher their communities — and all of humanity — through the climate crisis.