I would check on the hardiness of you zone before planting too much. I know hardy kiwis are pretty tough. They grow like crazy though need a trellis or fence they are a type of vine bearing plant.
Also planting elephant kale is healthy for the chickens. I have one that is about 7 feet tall the chickens love the leaves. Somehow it survived 3 year through 3 snow falls. Impressive plant
Honestly seems like something that might be overpriced nonsense. I wouldn't waste money on it. Buy higher quality feed or invest in a bsf farm. Maybe plant a few grape plants of you have the room for it.