The best time to plant garlic is in the fall, notes The Old Farmer's Almanac, though garlic can also be planted in the spring. Gardeners should plant about the time of the first fall frost, according to Cornell's gardening website.
Planting in the fall gives the garlic longer to develop, producing larger bulbs, according to The Old Farmer's Almanac. To plant, gardeners should place cloves about 6 to 8 inches a part in well-tilled soil says Good Housekeeping, but the Old Farmer's Almanac notes that 4 inches is sufficient. Good Housekeeping says that giving them a fertilizer of fish emulsion and liquid seaweed in the spring can encourage growth.