There are two methods for producing baby corn: either as a primary crop or as a secondary crop in a planting of sweet corn or field corn. In the first method, a seed variety is chosen and planted to produce only baby corn. (Many varieties are suitable, but those developed specifically for baby corn tend to produce more ears per plant.) In the second production method, the variety is selected to produce sweet or field corn. The second ear from the top of the plant is harvested for baby corn, while the top ear is allowed to mature.[3]
Baby corn ears are hand-picked as soon as the corn silks emerge from the ear tips, or a few days after. Corn generally matures very quickly, so the harvest of baby corn must be timed carefully to avoid ending up with more mature corn ears. Baby corn ears are typically 4.5 cm to 10 cm (1.75 inches - 4 inches) in length and 7 mm to 17 mm (1/4 inch - 2/3 inch) in diameter.[3]