Most container gardening guides skip the most important part: why containers fail before the plant even has a chance. The answer is almost always drainage and compacted soil, and the fix is not a better plant or a more expensive fertilizer. It is building the container correctly from the start, layer by layer, so that water moves the way it should and roots can breathe. I built this system on a balcony using kitchen scraps, composted soil, and materials that cost nothing. Here is exactly how it works, from the rocks at the bottom to the first harvest two weeks later.