There are tons of safe plants you can use. I know I have a link to a website with safe and unsafe plants but I can't seem to find it.. search terms: safe plant list reptiles.
While there are lots of plants you can use, you should stick with more durable plants that can hold up to a snake slithering through or perching on. Bamboo and pothos are both very common and durable plants. Air plants or small bromeliads might be nice as small decoration but also could get messed up by the snake.

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