I received a false cypress about five months ago. Initially it was thriving. About two months ago I think I let the tree get too dry. The moss died and the soil was extremely dry. I began watering it more often, including submerging the entire tree in the sink once a week. The tree began turning brown and brittle, but I added new moss and continued this watering cycle. The tree started turning green and less brittle. About two weeks ago the tree again became brittle and brown. There are still a couple of branches that are lively and green. Two questions: is there anything I can do/change to try and revive the tree (how often should I water the tree does this include submerging)? And is there any way to determine if a tree as root rot?

Thanks,

Rich