How to Grow Radishes Hydroponically

Use the directions and labels on your particular system to familiarize yourself with the components of the hydroponic garden. Locate the power switch, water tray, growing pods and programming switch. Note any system preferences in regard to growing foundation, and make sure that the pods are large enough to support radishes.

Fill the pods with a nonsoil growing foundation such as perlite, gravel, peat moss, wood chips or fern matter. Nonsoil foundations maintain cleaner, weed-free environments and offer better drainage.

Plant radish seeds 1/4 to 1/2 inch deep, with one seed per pod. These root crop plants require adequate pot or pod space for vegetable production via their roots.

Mix hydroponic nutrients with water according to the manufacturer's directions. Use balanced vegetable nutrients to supply radishes with the nutrition they would garner from standard soil and fertilizer schedules. Pour the nutrient and water solution into the water tray to water the seeds. Never omit the nutrient solution, as the plants will fail without it.

Put the hydroponic garden in a spot that gets four to six hours of natural or artificial light every day. As root crops, radishes require only partial sun every day, and thrive in artificial light.

Set the system to water the radishes once a week with 2 to 3 inches of water. Refill the water tray when it empties to maintain this source of support.