How to Grow a Hydroponic Tomato


Growing tomatoes indoors provides fresh fruit during the winter months when it is difficult to find quality tomatoes to purchase. Home hydroponics systems allow gardeners of all skill levels to grow garden produce 12 months out of the year. Many gardeners prefer to grow tomatoes indoors year-round because of the benefit of few problems with pest and diseases found in outdoor gardens. The water nutrients are also controlled to increase tomato size, quantity and flavor.

Step 1

Put together the hydroponics growing system and fill the water reservoir with water. Turn the system on and verify the pump and water is working properly prior to placing plants in the system.

Step 2

Test the pH of the water in the hydroponics system to verify it is acidic with a pH of 5.8 to 6.3. Add potassium hydroxide to raise the pH or phosphoric acid to lower the pH according to the package instructions for the volume of water in the system.

Step 3

Arrange the hydroponics system so the netted growing pots are 10 to 12 inches apart. Fill the netted growing pots half full with water-moistened hydroponics medium.

Step 4

Remove tomato seedlings from their growing containers and rinse the root ball lightly with water to remove as much soil as possible. Place the tomato root ball into the netted pots and fill moistened hydroponics medium around the roots to hold in place.

Step 5

Mix hydroponics nutrients into the water running through the system. Follow the application rate listed on the package for the type of plant grown and amount of water in the system. Add more nutrients when adding water to the system.

Step 6

Place grow lights over the netted pots if the hydroponics system is indoors. Set the lights 6 inches from the tomato seedlings and raise them as the plants grow. Tomato plants grow best with 16-hour light days.

Things You'll Need

  • Tomato seedlings
  • Hydroponics growing system
  • Water pH test
  • Potassium hydroxide
  • Phosphoric acid
  • Netted pots
  • Hydroponics medium
  • Hydroponic nutrients
  • Grow lights


  • University of Arizona: Growing Tomatoes Hydroponically
  • Hydroponic Garden Growing: Hydroponic Tomato Gardening
  • Simply Hydroponics: Home Grown Tomatoes
Keywords: grow hydroponics tomatoes, plant hydroponic tomatoes, hydroponics garden

About this Author

Jennifer Loucks has over 10 years of experience as a former technical writer for a software development company in Wisconsin. Her writing experience includes creating software documentation and help documents for clients and staff along with training curriculum. Loucks holds a Bachelor of Science major from the University of Wisconsin - River Falls specializing in animal science and business.