Erica's Notes Kohlrabi performs best when it matures into cool weather, and it's easiest to grow this crop for fall harvest. However, since kohlrabi is a family favorite, I try to grow both a spring crop and a larger fall/winter crop Crowded kohlrabi doesn't bulb up properly, so transplant seedlings to 6-inches apart in an 18-inch wide row, or in an offset grid with plants 8 or 9-inches apart in all directions. Harvest spring sown kohlrabi promptly after it sizes…