Raised by his parents to be an “inquisitive naturalist,” Mountz sticks to sustainable practices, specializing in a series of custom heirloom tomatoes that outperform any other seeded vegetable. Other signature seeds include Bloody Butcher Corn, Detroit Dark Red Beet, arugula and mustard greens. Seeds and products available at Trove General Store in Paoli. Kennett Square, (610) 217-7723, happycatorganics.com.