Secret Garden

About the hydroponics garden in my basement.

Wed 21 February 2024

I had a "Secret Garden" in a storage room in the basement of my house. It was a hydroponics system growing leafy greens and herbs. You can see an hourly photo of it below:

Click the above photo for a larger version.

There's usually kale, spinach, cilantro, parsley, and green onion growing. Sometimes dill and basil. It's currently not active this fall of 2024 because I'm planning travel.

Nutrient Film Technique

The garden uses nutrient film technique (NFT) to continuously deliver a shallow stream of nutrient solution to the plants growing in 2" ABS pipe. A submersible fountain water pump sends nutrients up 1/4" irrigation hose to each of the four pipes. The nutrients flow down the slope passed all the roots and return to the ~40 L reservoir. An air stone oxygenates the water. Two computer case fans ensure adequate airflow.

four black pipes supported horizontally by a wooden frame. eight small seedlings are growing out of the pipe under four grow lights total. two fans on the right. a pink towel is down below, covering the reservoir.

The nutrients are kept in a reservoir underneath the towel, which helps block light and limit algae growth:

the reservoir with the towel removed. the yellow lid is cut in half and has a tube poking out of it with a distribution cap for the 1/4 inch irrigation lines to connect to. black return pipes are on the left, pointing down into the reservoir through a mesh bag acting as a filter.

Previous Garden

My previous system Helios Alpha could grow up to six plants. It's designed around a single 102 L plastic tote. It holds enough water to harvest lettuce once before refilling. After the initial setup, the system can be ignored for weeks.

the hydroponics system from two angles. a black tub with yellow lid, covered in tin foil with six holes for plants. grow lights above suspended by metal shelving.