Come join us as we celebrate 40 years of growing some of the nation's finest specialty mushrooms! Your Open House experience will include a 30-minute tour of our facility, a gift, wine tasting, and a plethora of mushroom-centric foods from the GMI staff, local chefs, and other local partners.

Your tickets will be based on your tour time. Please plan accordingly when purchasing your tickets as tour groups are limited to 30 people in size and we will not be able to move your tour time once your ticket has been purchased. Well behaved children 12 and older are welcome to attend with ticket purchase.

One guest from each tour will be randomly selected for a special prize. Fresh mushrooms will be available for sale at the event, along with food from our vendors (there will be plenty of free samples of course!) and some other small items.

We are offering 2lb and 4lb baskets of our specialty mushrooms, pre-order only. Baskets will be an add-on item to your ticket during checkout and will be available for pick up during the event. Please note there are no refunds for baskets not picked up during the event.

Our mushrooms are staple ingredients for the innovative non-profit Ceres Project who has teens cook for nutrient dense meals for people struggling with illness. A portion of thel proceeds from this event will go to The Ceres Project.

The following businesses and organizations will be participating in the Open House:

Ceres Community Project | Dutton Goldfield Winery | Red Car Wine Co | CJ’s Cobbler | wild brine | Wood Fired Pizza with Living Earth Structures | Firefly Chocolate | Don Chi Designs | Sonoma Creamery | Miyoko's Kitchen | Worth our Weight | Revive Kombucha | Guayaki