Nature Addon

So, I have a realm with already 5 add ons in it but they don't clash and I've been all 5 for about 3 months with no issues yet. Were a community gameplay, so I want to find stuff for my players to sell, enjoy, and decorate the community with. I was wondering how good this add on really, is and I have a few questions. 1. Do they trees spawn just literally wherever they like? Am I gonna see a giant magenta tree in a pale biome? 2.it looks like its in 64 pixel count for basically most of the blocks and mobs in that plus the plant blocks themselves seem to have alot of polygons, so is this going to lag my realm? The addons we have now: Naturalists, Farming, Spark Portals, Shipping Services, Security