I have a non-standard mound septic system. (not a standard system) I am trying to find out if there is anything safe to plant on top of it. I've heard everything from "nothing at all" to wildflower seeds are okay, to shallow rooted plants are okay. All the information i've come across is a bit contradictory. Ive called nurseries, the guy who maintains my system , the county, you name it and still no real answer. Mostly it's "nothing". I can handle "nothing" if i must, but that huge mound of dirt with nothing on it right next to the house is quite unsightly. If you know about non-standard mounding septic systems and landscaping them (or not) or if you know someone who knows, I'll be grateful for your communication.