I need some help landscaping a small retangular yard that has leach lines from the septic tank running the whole length. I will be able to install a flagstone patio that will extend 8 feet from the house and run the length of the house (48 feet). Then I have about 15 feet from the patio edge to the property line. I realize trees cannot be planted. I was hoping to plant some sort of bush along the property line surrounding the yard. Or vines. I don't think I will be happy with grass and a block wall! I'd like something more permanent than wildflowers. I'd really prefer to pave the whole thing but cannot. I seem unable to find any examples of leach line gardens. Any suggestions out there??