Hadn't thought of that, although we do put out flags at the graves of veterans on both days. Memorial Day has its origins in our Civil War so there ought not to be a poppy association. However, Americans have hijacked that holiday as a general day to commemorate all dead relatives and then have picnics. It marks the beginning of our summers.
As for November 11, most Americans IMO (although not the ones at RF!) are woefully uninformed as to our own history and probably don't know about Flanders fields, the poppies, etc. World War I is pretty much a forgotten war here. It breaks my heart to think that the sacrifices of men like my grandfather have been forgotten.