Hi Duane
Malabar spinach should be no problem propagating from cuttings. You can either direct plant cuttings by removing leaves on lower stem and planting in the ground, leaving two or three leaves at the top. Cuttings will also root well in water.
I don't have a greenhouse (yet) so can't say how well it overwinters that way. I think it's well worth a try!
Please report back. It's always good to know what is working and what folks are doing out there.
