St. Elizabeth Ann Seton Catholic Church issued the following announcement.
Prior to October 15th, please remove all items you wish to keep that are decorating your loved ones' grave site. The cemetery will be completely cleared of all decorations starting October 15th. In-ground vases will be turned down until spring usage. After November 15th, wreaths, mounds and evergreen blankets may be placed to remain until the spring clean-up. Call the Mt. Calvary Cemetery Association at 319-362-4659 with questions.
Original source can be found here.