In case you need to find the ID of a plant not listed anywhere and if the mod isn't importing to the config file, you can use the game's template tool in debug mode.

Templates are saved in ...\OxygenNotIncluded\OxygenNotIncluded_Data\StreamingAssets\templates and subfolders, in yaml files.

What you want to do is go ingame, find on the map the plant you need to know the ID of, activate debug mode with BACKSPACE (by default, at least)
In the top right corner there is a selection tool. Click it and then click on the tile containing the plant to select it. Under the selection tool, there is a text box to define the template name, and a button to save it. You should find your new saved file in the templates folder. It contains the details of the saved tile, normally an element, its mass and temperature. It will also list "Other entities", where you will find the ID of the plant in the tile.