At bud break, it just happens much earlier for us. Looking through my pictures and videos it's about mid February for us.When do you repot your Oaks down here in south florida?
I have been trying to do this when I can. For the oaks and some other species too, Gmelina, Water Jasmine and bougainvillea come to mind, I'm finding it difficult to find the right time to do it. As I try to allow the branches to lengthen and gain strength they lignify when I least expect it.My advice on your trees... make sure you wire your branches. Right now you are doing an excellent job with the clip and grow method, but it is apparent in your branching where all your branches are straight between nodes. Toss some wire on your tree and give all of your branches some movement. It is critical if you want to create the illusion of an old tree in miniature.