Outdoor environmental hazards for bp's?

With my wife getting into photography more and more, she is coming with ideas for what she calls snake shots. I am very excited that she has taken a big interest in photos and including the bp's in them, But then I started thinking about the environment. I know bp's are healthy/hearty animals but they are not native to our area. Outside of keeping them off the lawn 48-72 hours after it has been treated with chemicals, my question is the following.

Are there any issues that people are aware of with general landscaping plants and such that we use for outside house decor? Toxic, irritating etc etc? Probably a dumb question but since bp's are not native here i was thinking that there may be some issues with certain types of plants etc.....let me know if anyone has some experience with this.

Ty as always:)

I hear them lawn gnomes are pretty vicious...