Just had an oak pop roots all the way the wrap after a couple months. When I checked 2 weeks ago it looked exactly like that, nothing but undifferentiated callous forming. In a month or two I’m hoping to have a 4” oak layer to grow!
I’ll probably leave it till spring but in FL I won’t get cold till November if it all. Just about 3-4 extra months maybe. I’m coming into a hot rainy part of the year so it may send roots like crazy in which Case I’ll either separate or add media around it and close it back up.
Don't give up! You are almost there. Open the cambium and expose some green with a knife. Apply rooting hormone and sphagnum. You are 3 weeks away from a bunch of roots. All the sugars are built up and ready burst.
Also you can feel under the top callous for the bridge that is feeding the lower callous. It will be a raised bump. Remove the bridge.
Just had an oak pop roots all the way the wrap after a couple months. When I checked 2 weeks ago it looked exactly like that, nothing but undifferentiated callous forming. In a month or two I’m hoping to have a 4” oak layer to grow!