[GarterGuy]

I used to have my first garter ( a VERY long time ago) on astroturf. Things to look out for is make sure that it's not treated with anything, like a fungicide, to keep mildew off of it and also make sure that any loose threads are trimmed off so they can't be accidentally ingested. I had my Manitoba Redsided (T.s.parietalis) on it for her whole 9.5yrs. and she did fine. It is kind of a pain to clean, and it's best to have spares to put in the tank while you're cleaning the other one. Also didn't like that she wasn't able to burrow in it, all my garters love burrowing through their substrate.
Roy