Are the rules different for the Cremation Gardens decorations?

Yes. See the Gardens policy document on this site for details. Monuments are pre-installed, engraving is included on many of the products with your purchase. The decorations policy is vastly different than the main part of the cemetery. (no glass, lights, statues, permanent decorations, vases, etc.) Temporary decorations may be left for no longer than two weeks. Fresh flowers may stay until they have wilted.