This is a landscape job that I did last summer. The Fire pwr Nandinas at the front of the bed are dieing dew to poor drainage. That down spout had a flex pipe installed the next day after the job was complete, and it extends out into the yard about 2 feet past the bed. The soil here sucks, it was all clay and I tilled in compost and topsoil. The boxwoods are doing fine. Yesterday I pulled up the Nandinas and there was about 4 inches of water standing in the holes. So, when I made this bed in the clay, I basiclly created a catch basin that will not drain. This is what I am thinking needs to be done, and please tell me if it is the correct way to address this problem. Pull all the plants out, put a corrugated pipe underground at the front of the bed and raise the bed with Pete or sand tilled in? Not sure which or both. Then do I need to run laterals T-ing off out into the yard or into like a french drain? Thanks for any input.