Quince, when can I air layer

[Slow Learner]

I have a very large, old quince bush (about 8 ft high and 8 ft in diameter) at the border of my yard. It is a multistem (literally hundreds), very thorny and produces red flowers in very early spring but rarely yellow, tennis ball sized, fruit. I do not know the species.

I would like to know when is best to attempt to air layer or cuttings form this quince? Is it too late in the summer? I can do several as it is large and the neighbors yard man tries to trim it if I do not intervene.

 

[Stan Kengai]

Cuttings in late summer as the weather begins to cool. Bright spot with no direct sunlight. Let them go dormant, but keep from hard frost.

Air layer after first flush of flowers in spring.