Quality, fresh produce starts with quality inputs! It's not surprising to find out that when you feed a fungus more raw materials like protein and calcium, the resultant mushrooms contain more nutrient value like protein and calcium. The mushrooms at phillyGrown.farm are grown using a very simple substrate formula: wheat straw, organic rye berries, Bragg's liquid aminos, organic soybean oil, limestone, and gypsum. This combination creates a rich, full nutrient package for our fungi that provides the most nutritious, best tasting mushrooms. We value quality over quantity, and we only sell the highest quality products! We use no animal products, no synthetic chemicals, and no pesticides, period!