What aquarium plants can grow in brackish water?
While the internet has many forum posts and articles about brackish plants, we have not had much success in our testing so far. Anubias and java moss died, and the hornwort shed all of its needles in the water and made a big mess. The only two plants we've had luck with so far are mangrove trees and java fern. The java fern had to be slowly acclimated from freshwater to brackish water over the course of 2-3 months, and while it has not died yet, it does not grow very quickly either.
In the future, we plan to try other plants, such as vallisneria.