Hydroponic systems—a method for growing plants in water rather than soil—are popular because they offer a way to produce a bounty of plants in a relatively small area in an indoor garden.

is probably the most common hydroponics system in the world. Our Beginner’s Guide To Hydroponics is on sale for a short time.

It comes as no surprise then that hackers, makers, engineers, and scientists have been working with and improving hydroponic systems for centuries. Hydroponic plant growth is a project you can ...