Select a south or west window. When planting, mix two parts sterilized potting soil and one part coarse sand or perlite. There should be an inch of gravel at the bottom of each pot to ensure good drainage. Misting and grouping the plants on a tray of moistened pebbles will help keep them in a humid condition.
Annual herbs can spend their full life cycle in a pot indoors.
Perennial herbs, however, will do better if you place them outdoors during the summer. Plunge the pot in soil up to its rim, or keep it in a protected location on the porch or patio. Herb plants need sun during the summer months, so place them accordingly. To prevent loss of foliage and plant damage, bring herbs indoors before frost. You can maintain an indoor herb garden indefinitely by periodic light feeding, yearly repotting, renewal of annuals, seasonal moves outdoors for perennials, and occasional pruning.