The formal gardens were originally designed in the 1920's by architect Alfred Koerner for Gerard and Claudine Gignoux. The gardens are presently maintained and have been expanded by their granddaughter, Jane de la Celle.  

Every year, on the last weekend of May and September, the gardens host the Fête des Plantes. 

The gardens are open to the public during weekend afternoons, holidays and by appointment from May 1 through October 15.  

For more detailed information, see website