Rooting Hormone Overdosing???

[kvan64]

I airlayed a nursey crabapple. A 1cm width ring was done with rooting hormone applied and when I check 4 weeks later, heaps of short new roots. 7 weeks later, the bark...heals and regrown completely
I did another ring below the old ring, applied rooting hormone and another 4 weeks pass. The new ring healed.
I just did the third ring and this time, no rooting hormone. Hope that it will take this time.

[Chris H]

Id think it is more likely that your ring bark was not wide enough I usually do at least 25mm

and you have to be very careful to make sure you remove all the cambium layer underneath. Just the smallest bit and it reconnects.

[Jamie]

i agree with hartos there, the ring bark taken of should as a general rule of thumb be 1 and a half times the tickness of the trunk, generally i go 2 times the thickness, which generally ends up being 25mm or more, so theres that covered, the other thing is i think you probably should of left the layer on longer than 4 weeks, i think that even though some of it healed over it looks like new root stubs were growing and these would keep growing if left long enough.

JMO



jamie

[Petra]

Sometimes this happens. When doing an aerial layer, Make sure the distance between the 2 cuts is far enough apart, i make it 4 to 1. so if the layering branch is 1cm thick i would make my 2 cuts 4cm apart. some can even be 6 to 1 depending if they strike easily. Also you must remove all the cambiun layer, this also causes fusing if you miss some. good luck.

[kvan64]

Thanks for all the suggestions guys. Will make it wider next time.