Q.35 Yr Old Calamondin. Have It Fo 2 Winters Now. Desperately Need To Get Roots From Cuttings. Or Air Rooting. Tried Multiple Times.
No luck. Bought about 4 plants already. Wont survive winter. On picture shows top of plant just died. It was already above 40 degrees for more than a week 2 months ago. From about 8 feet,4 ft wide. I trimmed it to about 5 feet to get it in and out of my house easier. It suddenly froze for a few day. That why it looked like that.(I will trim it again). I know there new ones sprouting out. That why I want to start from the cutting. Please advice.

Certified GKH Gardening Expert
You will have to take it inside during the winter. These articles should help:
https://www.gardeningknowhow.com/edible/fruits/calamondins/growing-calamondin-trees.htm
https://www.gardeningknowhow.com/ornamental/trees/tgen/planting-trees-from-twigs.htm