and travel to one of the most unique farmers markets in the stata. it's all ahead, and it starts now. you would think being around watermelons all day, you might get sick of eating the sometimes messy snack, but not for farmer dan van groningen. >> that's good. that's crispy. it's sweet. it's wet. it's everything a watermelon should be. >> but then again, he's had a lot of practice eating watermelons at his family farm in ripon. for more than 70 years now, they've been growing the picnic favorite and have loved every minute of it, seeds and all. >> 1939, we started growin' watermelons the first time. my grandfather did, and, uh, my father was young then, and he would do the harvesting. they would, uh, load the watermelons into small, little trucks and-- and bring 'em to the rail car and load 'em--stack 'em by hand in the rail car, and that's how a lot of the watermelons were shipped. >> dan's right. when it comes to the harvesting of watermelons, not much has changed over the years. the melons love the warm days and cool nights the central valley off