It’s a picture-perfect summer morning amid the rolling green hills of southwest Ohio, and Melissa Renee settles into her chair on the deck of her two-acre homestead. Drinking a cup of coffee, she takes in the sites and sounds of horses neighing, birds singing, hens cackling, and the hoot from a solitaire owl. She waves…

MILLERSBURG, Ohio—In a warehouse outside of this village in Ohio’s Amish Country, Brenton Wengerd walks along aisles of shelves stocked with 700 varieties of seeds that range from fruits, vegetables, and herbs to flowers, ancient grains, and cover crops. A day earlier, his company—Berlin Seeds—co-hosted the second Food Independence Summit, where gardening and homesteading enthusiasts…