Idea/Suggestion: Being able to place non-hazard/organic giving plants in creative.
Within the creative inventory/research, there would be another button that would have a plant symbol on it. In that tab, there would be the items and objects for a player to place non-hazardous plants such as:
ie Large cave plants (found in the mantle)
ie Trees, Cacti
ie Grass, Mushrooms
Research/Byte Giving Plants
ie Spherical Bushes
Another possible method to place these plants would be an auto generation tool. This tool would possibly work by having the player select the terrain color(s) they want his or her selected plant to generate on or have him or her "color" in an area to generate selected plant, then clicking a generate button.
This idea could also include placing large researchable items (such as the ones found in trees and in caves), other research/byte giving objects (such as the stalagmites in caves), Debris, and other items that cannot be obtained through the creative inventory (such as Large Starship Horn).
In conjunction with the terrain tool, players would be able to decorate their own worlds and create their own woods, plains, mushroom forests, or gardens with ease without having to make do with what is already there.