Elephant garlic (Allium ampeloprasum) is only distantly related to garlic and is actually a species of leek. Elephant garlic has leaves like a leek plant, but a large, garlic-like bulb. The bulbs, with a milder taste than standard garlic, can weigh up to a pound or more. Elephant garlic, like real garlic, does not set viable seed and the individual cloves are known as "seed garlic," and available in the bulb department at gardening centers. Sow the elephant garlic seeds, in a sunny area, from September to November. Elephant garlic is hardy to USDA Zones 5a to 8b.
Prepare the elephant garlic bed by digging up the soil to a depth of 18 inches. Crush any soil clods larger than your fist, and remove any rocks or other debris.
Add 3 lbs. of 5-10-15 fertilizer for every 100 square feet of planting area, and mix it into the top 12 inches of soil.
Plant the elephant garlic seed with the base 2 inches deep and the tip just barely covered with soil. Space the seeds 8 inches apart. If planting more than one row, place the rows 18 inches apart.
Water the bed until it is soaked, and keep the area moist while the seed germinates.