BlueEggFarmer...welcome to the forum. I am an organic gardener, and raise chickens, as well. I have not yet gone organic with the chickens, as I need to find a source for organic feed, but we love the eggs we get. I would like to do what you're doing...I'm still getting my soil built, planting an orchard, etc. I'd love any information you'd share about organic chickens.
As for how much to
plant, I can't advise on that, but I have such a harsh climate here, I have a constant battle to get results. I'd
plant more than you think you need, to ensure you get plenty.