Fill a pot ¾ full with organic potting soil. A 2- to 3-gallon pot will provide plenty of space for growing. The pots should measure at least 10 inches deep. Press individual garlic cloves ½ inch deep into the soil, pointed end up. Space garlic cloves at least 5 inches apart.
Water the garlic cloves immediately after planting. Keep the soil moist, not wet, throughout the growing process. Allow the water to flow through the layers of soil and out the bottom of the pot with each watering. Indoor garlic usually requires watering once every other week.
Set the pot in an area that receives at least six hours of bright, indirect sunlight. If you do not have access to bright, indirect sunlight indoors, set the pot under a grow light set to run for at least 12 hours per day.
Slide a plant heating pad under the pot. Garlic prefers to grow in temperatures between 65 and 70 degrees Fahrenheit. Set the plant heating pad to the required temperature to keep the garlic warm as it grows.
Continue to maintain light, water and warmth as the garlic grows. Garlic cloves mature in approximately four to six months. The green foliage will turn yellow and fall to the side when the garlic is ready for harvest. Repeat the process in fresh soil after digging up the cloves.