How do you harvest kohlrabi?

To harvest kohlrabi, wait until the bulbs are about 3-4 inches in diameter, which typically occurs 6-8 weeks after planting. Use a sharp knife or garden shears to cut the bulb from the stem just above the soil line. It's best to harvest kohlrabi in the morning when temperatures are cooler, as this helps maintain its crispness. Be sure to check regularly, as kohlrabi can become tough and woody if left in the ground too long.