Growing herbs indoors provides the small-space gardener with a constant supply of fresh herbs all year long. The common way to grow herbs indoors without soil is using a hydroponic grow system. Hydroponically grown herbs have stronger flavors than those grown in soil. You can purchase hydroponic grow systems and supplies online or at most garden centers. Setting up hydroponic grow systems is simple. The amount of space used depends on how many different varieties of herbs you wish to grow.
Choose a permanent location for your grow system. After the location has been chosen, lay down rubber stall mats. This will give you a nonslip surface on which to work. Set up the hydroponic grow system.
Install grow lights to make sure there is enough light available for your plants, even if you are using a green house. Most herbs require at least 8 hours of light per day. Growing herbs hydroponically in a greenhouse may require less use of lights depending on the season and individual days. The less sunlight available, the more often grow lights will be required.
Place seeds into grow cubes. One seed per cube is sufficient. Unlike traditional seed starting, germination rates are higher in hydroponic grow systems. Insert grow cubes into the tray provided with your grow system. Seeds should germinate in 7 to 10 days.
Transplant seedlings when they are 2 inches tall. Use net plots to hold the plants in place in the hydroponic grow system. Add 1 teaspoon of grow medium to the water supply.
Monitor the pH balance of the water system; it should be kept around 6.5. pH can be adjusted by adjusting the amount of nutrient content added to the water.
Add grow medium (nutrient content) every two weeks. Drain water every 3 weeks and replace with fresh water and nutrients.