I'm planning to re design my outdoor enclosure for my torts but our whole backyard has a mix of grass, dandelion greens, etc. I was thinking of having a section of dirt where I can freely plant the type of greens i want but even if i cover the weeds with dirt they will slowly creep out of it and infest my enclosure. Would you guys recommend weed killers? but then i'm worried about my torts around those things, as much as possible i want to keep my whole backyard chemical free just in case.