Good roaming area?

[Ash&Tort]

So I have a big patch of land that I've just never done anything with (ive been here 2 years, but I don't know if the previous owners used the land for planting anything). I'd love to just give the whole thing to my sulcata, slowly start fencing it in while he grows so he has a nice big area to roam and graze and do tortoise stuff. But I want to make sure that there's nothing harmful for him before I start making any plans. I took a walk and snapped some pictures of the kinds of plants that are growing out there. I live in Montana, if that helps at all. Let me know if you see any potential problems please?

 

[johnsonnboswell]

3 looks like artemisia or something like it. That would be a no.

The varigated leaves may be ground elder.

 

[Iochroma]

I don't see anything in those pictures that would be dangerous.