According to Washington State University, garlic planting in the northwest must occur during the months of September to October. Planting the garlic later on in the season, November to February, will result in lower yields to the bulbs. Garlic prefers a light, friable soil with little clay, as clay will deform the garlic bulbs. Bed preparation is key to planting a good crop of garlic for the Northwest region of the country.
Layer organic material onto the garlic bed at a rate of 2 bushels per 100 square feet of bed.
Broadcast 3 lbs. of 10-10-10 fertilizer per 100 square feet of area.
Work the material into the soil with the rototiller. You can also dig the material into the soil using a shovel, if no mechanical means are available.
Separate the garlic bulbs into individual cloves. Each small clove will grow into a large bulb, exactly like the planting bulbs you are separating.
Plant regular garlic with the individual cloves approximately 5 inches apart, in all directions, in the growing bed. Cover the bulbs with ½ to 1 inch of soil.
Place elephant garlic at a greater spacing between each clove. Set the cloves in rows that are spaced 18 to 20 inches apart. Plant the individual cloves in those rows 8 to 10 inches apart. Cover with soil 1 to 2 inches deep.