A quick update:- The Oak is still alive and looking quite healthy- just came into leaf 2 weeks ago.
I had p
artial success with the original air layer:- as you
can see roots
have formed but unfortunately the trees has also partially callused and bridged the gaps.
Also I found 3 large slugs inside the original airlayer wrapping which cannot have helped the emerging roots.I dont know how they got in!
I have now recut the 'bridging' cambial layers between the new roots , dusted the upper cuts with hormone rooting powder and re- potted/ wrapped the air layer with a mix of akadama and compost.
Hopefully the tree will now produce a second crop of ymore roots.