An indoor herb garden provides fresh herbs for culinary uses and home remedies all year round. However, growing herbs indoors does require some careful planning and preparation. Herbs are happy to grow in pots inside, but only if they are correctly positioned, properly cared for and get plenty of sun.
Prepare your pots. Herb pots need to be about 8 inches deep and 6 inches across to host a single plant. If you are going to raise multiple plants in the same pot, then they need to be spaced about 8 inches apart. Cover the bottom of the pot with the wire mesh, then fill the pot with a 1:1:1 mixture of potting soil, mushroom compost and coarse sand. It should be damp, but not runny or sticky with moisture.
Plant your herbs. You can plant several seeds in each pot or you can install a seedling purchased from a local nursery or pulled from your own garden. Depending on the herb, the seeds may need to be pushed into the soil or just sprinkled on the top. You will need to refer to the seed package since different species and cultivars have different requirements.
Place your herbs in a sunny, warm room. Herbs like temperatures of 60 to 70 degrees Fahrenheit, and plenty of sun. They should not be in a window that faces north. Herbs need a minimum of 4 hours of direct sunlight each day, but you can supplement that light with florescent shop lights so that they are getting 8 hours of light each day. Keep the herbs out of direct drafts.
Provide the herbs with plenty of water and food. When they are in the growing stage, they should be fed a fish emulsion once a week. Give them a good soaking twice a week, but do not water them daily or you will encourage the growth of mold, mildew and other fungi on the herb plants.
Trim your herbs regularly. Clip outer leaves and sprigs as you need them from your herb garden. This will keep the plants manageable. However, be sure to leave plenty of vigorous, healthy growth so that the plant will keep growing as you harvest the herbs.