Hello I have a question about avena sativa, this year I have grown oats in the garden and they have come up. My question is about when to harvest. I harvested some pretty early because I thought they should be thinned however I didn’t notice any milky substance in the stem. Do you need to harvest before the seeds come out of the grass? Will it always be healthy or is there a point where it’s too late to be considered medicinal and just becomes food?