So I went all out and made a vivarium for my one adult garter. She is 21 inches long, and the dimensions of the viv (on the inside) are 38.5" x 37.5" x 31". She is obviously going to have a ridiculous amount of room. I'm just wondering how many more snakes I could house in their with her. I was thinking of getting a couple more wild caught females to put in with her. I would quarantine them for about a month first to help ensure they are healthy and safe. From a lot of reading it seems that keeping male and female garters together really depends on size, intention to breed, personal preference, and being a vagrans or not. If I find any high-erythristic males I may consider them for the beautiful contrast between the melanistic and erythristic ordinoides.