Post #780311 by Johnny Dollar on Thu, Oct 5, 2017 11:49 AM

you may consider carpet tile, if you can find something that approximates the original grass mat, these are great since you can replace portions of it as required, instead of the whole carpet.

i also did a google for artificial seagrass floor, and came up with this; i would bet there are more options out there:
https://www.curranfloor.com/viewcategory.php?tag=All-Synthetic-Sisal