Is it too late to airlayer in zone 6 ? should i just wait until november and take cuttings ?

You still have over a month so worth a try.  If you don't girdle the branch, you can just remove it like nothing ever happened if it doesn't take.

I just did about 3 dozen over the course of the last few days to get some practice in since I am a newbie at this. Had a few done earlier that took well already so I figured with most of September still ahead, it was worth a try...

Cheers,
Tony

Sparky I think you are still inside the window of an AL likely taking before its too late this season to finish.. I'm zone 6a, set quite a few AL's myself just a few days ago, but I will squeeze another 1 or 2 in b4 this weekend.. After that, its only cuttings from there on out for me :) Like Don said though, don't girdle the branch just in case it doesn't take

@Jamie0507

Hard to believe that we are already on the down slope of this growing season! So much to do before the first snows fly; winter storage being my #1 concern again this year. Last year I filled every space in garage, basement, sun room, etc. with plants and cuttings from my Mandevilla's, Hibiscus and assorted misc plants besides the potted figs, this year, the challenge has grown and compounded itself with additions and propagations. Busy time approaches...

In another vein, I finally took a look at your collections / inventory spreadsheet; besides having a very impressive collection I can only aspire to, I am equally impressed with your spreadsheet format; very thoughtful and useful  data fields you are tracking...

Cheers,
Tony

Optimistically assuming 6 weeks for decent roots, then 2 weeks for the AL to push roots out into a pot, you'll have a new tree in late October -- just in time for frost.  What are you going to do with it then?  I really don't know, but I wouldn't want to force that plant to endure late October freezes, go dormant, and get shoved into a garage for the winter.  But maybe it wouldn't be so bad if you could extend the season a bit with a greenhouse or artificial lights.   

Last year I did fifty air layers about this time and left them on until they went dormant, separated, potted and left overwinter in the garage.  Every one except one survived and took off growing in Spring like nothing ever happened.  The one that died was in a terra cotta pot and dried out.

I hadn't thought of that approach.  Sounds great -- I'm tempted to say creative.  Thx.

Would you agree that it would be a mistake to remove the air layers before they're dormant?  Or is there a viable strategy for that approach too?