Was gonna ping Giga, but who knows who else might be knowledgeable about such things...
I want to take cuttings from a crabapple tree at the county wastewater treatment plant. I don't know the variety (I think it's Dalgo) but it's the only crabapple tree I've found in the whole city that has fruit good for making jelly, or for eating fresh if you like sour apples. I'd like to propagate it. I've looked online and I'm finding conflicting information. I would air-layer it in early summer if it were on my property, but of course it's not.
I think maybe softwood cuttings in late spring right after it blooms? Make a few vertical slits in the base of the cuttings with a razor blade and dip in rooting hormone powder (Rootone), then plant in a 50/50 mix of sand and potting soil. Does this sound about right?