For some odd reason MA removed the best harvesting spot on Caly and just completely changed the landscape. You could just grind trees. Then there is a bug where they never fixed the glowing orb to detect trees. Which is annoying since that is a buff for the 2016 xmas ring and now it doesn't work. Then they changed the distinction of being able to visibly see harvestable trees at Fort Argus. They were green when all non harvestable trees were red.
Not sure why any of this has happened but feel like MA doesn't want me to harvest on Caly
so I don't. RT is by far the best place to harvest, although since Toulan added harvesting and actual BP's for materials they apparently added more dense trees. (haven't tested much there on it yet or the new spots) Just want to thank the Toulan team for caring about a great profession and hope they add more BP's.
So don't waste your time harvesting on Caly till MA fixes stuff. Just do it on better planets like RT and Toulan.