The seed was planted a couple years ago.

Then, not long after the 3 Sisters Market opened last year in the old San de Fuca fire station, the idea took root.

Responding to public interest, 3 Sisters Farm is opening its barn doors for an old-fashioned farm dinner July 12.

It’s an idea the Muzzall family tinkered with in recent years, then chose to pursue after store customers expressed interest in coming out to see the farm.

The “Old Fashioned Farm Dinner” will last from 4-7 p.m. and will include a tour of the Scenic Heights Road farm in Oak Harbor that the Muzzall family has run for more than a century.

The cost is $75 for the event, with a portion of the ticket sales going to the Whidbey Camano Land Trust. So far, about 20 tickets have been sold with room for 20 more. Tickets may be purchased at the 3 Sisters Market store, just off State Highway 20, until Wednesday.

“We’ve just had tons of people always asking us about wanting to come out to the farm,” said Jessica Muzzall, a fifth-generation family farmer who, along with sisters Jennifer Muzzall-Jones and Roshel Muzzall, inspired the farm’s name. “They constantly were wanting to know how we live our lives. We heard a lot of positive feedback about the farm to table dinners. We decided to put our own twist on it.”

Like the store, the event is a celebration of locally-produced food and a chance to experience an old fashioned farm dinner at one big table.

All three sisters will be on hand to answer questions about the farm, along with their parents Ron and Shelly Muzzall. All live on the 600-acre farm.

The main course will be meatloaf made of ground beef and pork raised on the farm. 3 Sisters’ signature product is its grass-fed 3 Sisters beef, though the farm also raises hogs and lambs, as well as chickens for eggs.

Deb Tasoff of Coupeville-based Serendipity Catering will cater the event with a menu that will include mashed potatoes and gravy, vegetables produced from nearby farms, a marionberry cobbler, and Whidbey Island Ice Cream.

The occasion will start with an appetizer and wine hour, featuring wine from Whidbey Island Winery in Langley.

Jessica Muzzall, who manages the store, and her mother have been the main organizers of the event, though the entire family chips in.

They are planning a “rustic vintage” setting in the barn, nothing too fancy or formal, Jessica said.

“It’s really just old-fashioned,” Roshel Muzzall said.

It’s an opportunity for the farm to branch out into something new again. In April of 2013, the new experiment was the store, which is made up largely of Whidbey Island products from Whidbey Pies, Whidbey Island Ice Cream and Island Trollers canned albacore, to the latest hot item, Penn Cove Shellfish’s smoked mussels.

“It’s all local, local, local,” Jessica Muzzall said.

The store has grown in stock and popularity.

“We’ve been staying really busy,” Jessica said. “People really want to support local and sustainability.”