Siberian Pea Shrub Proprogation

When we first bought this grafted Siberian Pea Shrub 5 years ago we had no understanding of it's nitrogen fixing capabilities.

We bought it since we were simply looking for a small tree for our current house's back yard.  We are now trying to propagate it through cuttings. Once the the tree went dormant this fall, I took about 30 cuttings (8 to 10 inch) both from the top graft as well as some new shoots since they are not the same varieties. I do not know what varieties they are as I never noted this 5 years ago.  I planted them in some aged wood chips that have partly composted.  I will see if this proprogation experiment will provide me with some new plants next year that I can then plant around our lot where we plan to build our next house.