Leave it up to kids to think of something I couldn't see far enough into the future to think of! I can get the buckets and PVC and have a pretty handy husband. Can you find the info fairly easy? Or give me a good search term to use? Thanks!
Here is the link!
Basically, one bucket sits in another, with a pvc pipe connecting the two. There is dirt in the top bucket, with water in the bottom bucket, and a plastic cover (White garbage bag works in hot climates, black in cooler climates), over the top. The water recycles itself, so very little water is used, and there is no weeding.
It’s an ingenious idea, and I wanted to try this year, but did not want to invest the money (Irrigation water is free in my lease), but it’s a sound principle, and can be as simple or as complex a system (they have videos that explain form simple to very complex), and automatic watering for every bucket/setup. I hope it helps, I am going to try one or two this year, just to get a beter feel for it, but it allows you to easily grow food on a concrete slab, or anywhere, without tilling any soil.
Good luck, and take care!