How come you can't put a small flag or flowers on the grave. What can you put on the grave??

I seen flowers at several grave sites when I visited on Friday. I'm not sure about the rules though. If you call them they are very helpful Floral arrangements accompanying the casket or urn at the time of burial will be placed on the completed grave. Natural cut flowers may be placed on graves at any time of the year. They will be removed when they become unsightly or when it becomes necessary to facilitate cemetery operations such as mowing. Water will be available at outside faucets from May 15 to September 1. Containers such as pots, baskets, etc. are not authorized. Privately owned, permanent in-ground flower containers are not allowed. Artificial flowers will be permitted on graves from Oct. 10 through April 15 and may be removed when their presence interferes with grounds maintenance. https://www.cem.va.gov/CEM/cems/nchp/massachusetts.asp

You can put flowers on graves they give you metal vases that are to be used.