After more than thirty years in the US, Ukrainian immigrant and super gardener Alex Babich aims to make history by growing the nation's tallest sunflower for the third time, all while balancing the needs of his family and the challenges of nature.

After the devastating nuclear disaster in Chernobyl, Alex Babich’s parents sold everything they had to leave to the USSR and come to Fort Wayne, Indiana. Over the next thirty years, Alex worked to create a backyard paradise where he cultivates giant tomatoes, edible weeds, and honey-rich bees, but most importantly, sunflowers. Bloom follows Alex as he aims to make history by growing the nation's tallest sunflower for the third time, beating his previous record of 25 feet, two inches. Ferocious storms and curious animals nearly destroy his sixteen potential record-breaking plants, but his real struggle is balancing a borderline obsession with super growing and his responsibilities as a father and husband. Alex’s children consider the super garden to be part of their family’s identity, but don’t realize how its eternal upkeep puts pressure on a marriage. Alex promised his family that he would take a break from the garden if he won or lost, but as the growing season comes to a close, his drive for perfection makes him reconsider. Bloom explores the nature of obsession and balance of priorities. Will Alex achieve his record-breaking dream and call it quits, or will lose himself in an abyss of his own creation?