What does it take to grow a record-breaking 25-foot sunflower? As it turns out, the secret is mostly in the seeds. We spoke with Ethan Nelson about his gigantic sunflower, his potentially tallest-ever corn stalks (in Vermont, anyway), giant pole beans, and pumpkins out in his garden Tuesday evening.

For an extended version with more history and tips click here: https://youtu.be/O5ryAvz6H00