Gravesite Flowers Are Visitiors To Arlington National Cemetery Allowed To Leave Flowers Or A Potted Arrangement On A Gravesite?

Are visitiors to Arlington National Cemetery allowed to leave flowers or a potted arrangement on a gravesite? - gravesite flowers

I'm visiting the Washington area for the first time my father asked me to the grave of his cousin to visit the fallen in World War II. I would like Honer his cousin in the right way.