Yes, Seresin is the parent winery - took Robin Garr and Jenise there to visit on their NZ trip so many years ago.
The estate grown wines adhere to organic and biodynamic practices. They produce Sauvignon Blanc, Chardonnay, Pinot Noir, Riesling, Gewurztraminer, Sparkling and botrytised wines.
The transition to adhering to the practices and becoming certified by the governing agencies takes some time.
I believe the Momo is the first wine they have produced in their second label range to have full certification from BioGro.