I know that all parts of the nasturtium plant are edible for humans. With that being said I would think it to be okay for your beardie. That is just a guess on my part though. There are plants that we eat that are not so good for beardies....so who knows! On the food chart it says Nasturtium flowers and leaves are safe for beardies and I know you can actually buy bags of them. There could be a reason the stalks are not included on that list. To be on the safe side(unless someone else has some facts)I would personally not feed them again. So... unless you hear otherwise, you might just want to keep an eye on him and make sure you keep him orally hydrated.
I just set Swordtail's timer for his bath and paused it so I could actually fill his soaking bowl up and he crawled over my phone and canceled the timer
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!