Beginner Gardening: Drainage Issue in tiered bed, 1 by sharonkt

sharonkt wrote:
We purchased our home last fall with this tiered bed in place. The top level is at the same level as our blacktop driveway. Last year I planted a few tomatoes in the top bed but the bottom level was too wet and the roots rot or the plants wash away at the first rain. The rainwater runs off the drive way into the top level, drains to the second level and does not drain away. I know in the near future this bed will have to be replaced, but I am not ready to do that just yet. I thinking about putting in some drain pipe along the edge of the drive to divert the rainwater, but have no clue how to create drainage in the second tier. Any Idea?