CRF and Dormancy
I started a lot of containerized trees this year (mostly pawpaws), and used controlled release fertilizer (CRF). Most was Osmocote 8-9 month. They were started in a high tunnel. As the summer progressed, the sides on the tunnel were open. Even with temperatures at or below freezing this fall, most of the trees held their green leaves, seeming to delay dormancy. I moved them into an unheated barn recently as temperatures dropped into the teens. The leaves are still on the trees.
I read some research indicating that CRF may interfere with dormancy, as it continues to fertilize the tree late in the growing season. I would appreciate any ideas or experience anyone has with this issue. I hope my trees survive the winter.