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If you're planting your garlic in the fall, cover the area with 6 inches of straw to protect the garlic during the winter. In the spring, the mulch can be removed. If you're planting your garlic in the spring, be sure to mulch it to retain soil moisture. You should see the garlic scapes emerge from the ground in early spring. Cut off any flower shoots you see, since if they're left to grow they'll take energy away from the bulb formation and result in smaller bulbs. Water the garlic every 3 to 5 days throughout the growing season. When you see the soil get dry and dusty, that means it's time to water. Garlic plants don't need to be water during the fall and winter. If the garlic shoots look yellowish or limp in the middle of the growing season, you can dress the plants with fertilizer to help them perk up. Keep the garlic bed weeded so that the garlic doesn't have to compete with other plants for nutrients and water.
Mulch the area heavily. Cut off flower shoots in the spring. Keep the garlic watered. Fertilize and weed as necessary.