Just to make sure I understand correctly. Since I may not have a month before dormancy sets in, I should wait until next year for either cuttings/fertilizing or airlayering, correct? Or would it be feasible to lop them off after dormancy this season? Do the buds have to set before dormancy or will they form in the spring from the remaining stick and root ball?
Currently, I have the trees sitting on a southfacing slab of concrete along my house. It is a bit of a microclimate, too hot for summer but nice right now. I kept my kumquat outside there all last winter (only tarped on three frosty nights) and harvested fruit on Christmas. The surface heats up during the day and radiates it out overnight. That may extend my season, if things go like last year.
Otherwise, has anyone ever airlayered indoors? I have a sliding glass door, also on the south side, that gets a lot of light year-round. I have kept tropical plants in that location. Does anyone think that this may work? If dormancy is not absolutely necessary, I thought perhaps I could airlayer inside. I already plan to bring some of my smaller cuttings in this winter.