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Secret Garden

About the hydroponics garden in my basement.

Wed 21 February 2024

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

a hydroponics garden, taken from a webcam. it might be in colour or black-and-white depending on what time of day you are visiting this page. purple timestamp on the top left.

Click the above photo for a larger version.

There's usually kale, spinach, cilantro, parsley, and green onion growing. Sometimes dill and basil.

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.