I am bidding on a condo that has mangroves along the shore, which get lightly tipped every few months. They are in hedge form at around 6ft high, which is the lowest they can be from what I'm told. Does anybody know if I need a permit to maintain them? We will not be cutting any back at all just keeping them at 6ft. Also how often should they be trimmed? I don't want them over trimmed and be unhealthy. I'm doing more research tonight, thought I'd check in here first though. Thanks for any info.