Thanks again Tamsin,
the problem is, that I do not have a library with all the plants I need. The recource browser is a fine tool and normally I am working the way you describe (got it out of your book .
But now I have a bigger list, that I want to import into the recource browser.
So up to now, I only find the possibility to place a plant get the plant from the plant list I definded before and import it into the drawing or export it to my recource file. Maybe it would be a good tool, if I could import a complete list, just for the plant area without symbols.