The season’s first transplanting is cause for great joy, and for great trepidation. Moving the plants from greenhouse to field is a major milestone in the journey from seed to plate, but it introduces a host of variables the farmer can only marginally control. You can irrigate when it’s dry, but you can’t opt out of the rain. You can use row cover to keep out aerial pests, but you’re stuck with the ones below ground. Row cover provides a few degrees of frost protection, but i