When placing plants, site amenities, and other objects in a SketchUp model, you're noticing that these items are appearing in the incorrect locations.
You may have a User Coordinate System (UCS) set to the incorrect orientation in your CAD in some cases, you may have your UCS set backward.
Follow our steps to set the units and UCS in CAD and SketchUp.
If you have, in fact, been designing in a UCS that is backward or otherwise oriented incorrectly, your linework in SketchUp will most likely be disoriented beyond repair. Your best bet in this case is to correct the orientation in CAD and redo any linework or placements you've carried through while in SketchUp.