You can find some basic information on sites for growers

http://practicalplants.org/wiki/Malus_trilobata

Seed - best sown as soon as it is ripe in the autumn in a cold frame. It usually germinates in late winter. Stored seed requires stratification for 3 months at 1°c and should be sown in a cold frame as soon as it is received. It might not germinate for 12 months or more. Prick out the seedlings into individual pots as soon as they are large enough to handle. If given a rich compost they usually grow away quickly and can be large enough to plant out in late summer, though consider giving them some protection from the cold in their first winter. Otherwise, keep them in pots in a cold frame and plant them out in late spring of the following year. Cuttings of mature wood, November in a frame.

I have not seen any significant difference between cultivation of Malus_trilobata and old cultivars of apple trees (large trees).

Dear Alex,

My question concerns mainly asexual propagation (e.g. cuttings, microcuttings in in vitro) since there is not much published research on it.

Thank you very much.

Best regards,

Christos

Dear Dr. Chatzissavvidis

The following article, in Arabic with English abstract, is about the in vitro rooting of the Malus trilobata shoots that I hope to bring to your attention.

Dear Mr Miri, thank you very much!