Herbs and spices are often confused to mean the same thing, but spices are considered to be the root, stems or seeds of various plants, while herbs are generally the leaves. While spices such as cinnamon cannot be grown indoors, others like anise or coriander certainly can. Growing spices generally takes a larger container but can be just as rewarding as growing herbs in a kitchen window.
Choose a large round or square planting container that is at least 2 gallons in size.
Mix together three parts high-quality potting soil and one part sand.
Fill the container 1 inch deep with pea gravel. This will help with drainage to prevent root rot.
Add the potting soil mixture to within 1 inch of the top of the container. Water the mixture until the soil is thoroughly wet and the container is draining water from the bottom.
Sprinkle the spice seed of your choice over the surface of the wet soil. Anise, coriander and dill are all good choices for indoor growing.
Press the seed into the soil using your hands. Add an additional 1/4 inch of the potting soil mixture to cover the seed.
Thin the seedlings as directed on the spice seed package. In most cases, you will leave only the strongest plants that are approximately 1 to 2 inches apart in the pot.
Place the container in a warm area of your home that receives full sun. This could be in front of a large picture window or patio door.
Water as needed to keep the soil moist to the touch.
Allow the spices to flower and form seed pots. From these seed pots, you will collect the spice seeds for use in cooking.