How to Grow Spinach Hydroponically

Fill the growing pods with non-soil growing foundations like peat moss, fern matter, gravel, perlite or vermiculite. Hydroponic gardens avoid weeds, pests and mess with these tidier non-soil foundations.

Plant one spinach seed in each pod, to give the plants room to grow. Push the seeds 1/2 inch into the foundation. Put the pods in their designated places in the system.

Mix hydroponic nutrients, available from specialty retailers, with water. Follow manufacturer directions for the right mixture. Hydroponic nutrients supply vitamins and minerals for growth in this soil-less situation. Fill the water tray with this mixture for timed waterings.

Put the hydroponic garden in a spot with four to six hours of natural or artificial light every day, where temperatures stay at 60 to 70 degrees F. Set the garden timer to water the spinach once a week with 2 to 3 inches of water. Spinach does better with consistent, deep waterings rather than light daily waterings.

Harvest spinach as soon as leaves are large enough, with four to five leaves on each stem, or leave it until its maturity date of 35 to 45 days. Select the stems you want to harvest and cut them off at the level of the planting medium.