George,
I'm not sure about the season right now in Greece, but air-layers are best
done after the leaves have hardened off. More like late May here in
California, not the beginning of spring. Each tree specie has it's own
quirks, I'm not sure how your oak will respond. I've heard the Suber (cork
oak) doesn't layer well. I personally have never done an oak. Good luck.
Regards,
Shelly Hurd Central CA - Sunset Zone 8-USDA Zone 9


"George Bizas" wrote:

Hi All,

I have the opportunity to air layer an Oak tree. I think I have read
somewhere that Oak trees respond well to air layering if it is performed
on summer.
Am I going to reduce my success possibility if I do it now?
Can I air layer any branch size ?

I would appreciate any advice.

Thank you

George

George Bizas, Mechanical Engineer, Athens, GREECE