Hi i was wondering since i have so much honk kong orchid here in puerto rico and being from the pea or legume family, if the leaf could be used as nitroge fixing mulch. Can't find any info on this. Thanks
Well, some plants in Bauhinia seem to only grow from cuttinhs, others from seed.
Evidence of them fix nitrogen seems to be mixed.
As long the parts you use as mulch are not viable,they should be fine, and not compete with your plantings.
Btw, it seems that many Bauhinia are edible,check out this Eat the Weeds entry: