I think it may well go beyond panpsychism. For instance, see the work of Peter Wohlleben, e.g.

The Hidden Life of Trees: What They Feel, How They Communicate.

More specifically on plants, the work of Monica Gagliano. Check out her website: https://www.monicagagliano.com/

Also the work of the brilliant Indian scientist Jagadish Chandra Bose, largely forgotten now, undeservedly so. I did an article on him some time ago, if you're interested:

https://graham-pemberton.medium.com/the-secret-life-of-plants-and-the-revival-of-animism-part-1-422941b1b51e