Although there are several hydroponic kits designed and marketed for growing indoor herb gardens, you don't have to be a scientific genius, or even a hydroponic gardener, to grow herbs indoors in containers. Herbs are garden plants that adapt well to low-light conditions. Because of this, herbs can be grown indoors in small indoor container gardens. A kitchen herb garden in containers is a good way to grow herbs year-round.
Select containers that are appropriately-sized for your herb garden. Containers should be at least 4 inches in diameter. Woody, shrub-like herbs such as rosemary and lavender should be planted in larger pots, such as 12-inch-diameter containers.
Use a soilless potting mix in the containers. Soil contains microbes and nematodes that will attack the roots of plants in containers.
Place herbs in containers in a sunny, south-facing windowsill.
Supplement herb light requirements with fluorescent lighting from lamps placed 6 inches above the herbs. Most herbs require 6 hours of direct sunlight daily. If herbs do not receive this, they will become spindly.
Check your herbs daily and water as needed. The soil in herbal containers should remain as damp as a wrung-out sponge.
Fertilize with a liquid, balanced (10-10-10) fertilizer added to the watering can along with water. Use fertilizer according to the package directions. Fertilizer directions vary according to the fertilizer brand.