I have chinkapins naturally and the critters love them. The thing is because of the small acorn size, many birds and the like even eat them, so they don't last long. I don't have DCO so the chinkapins are the very first ones for me to drop. The chinkapins here start dropping in roughly late september (which is even before our deer season opens). I have seen trees that are 10 years old produce acorns in the right conditions. Here they like full sun and a coarse, upland soil with very little clay that drains well. Chinkapin is the primary white oak species on my place.