Examine the corn ears 90 to 110 after the seeds sprout. Inspect the silk on the top of the corn ears. The silk will darken in color and feel dry to the touch.
Feel the ends of the corn ears. When the corn ends feel blunt instead of pointed, they are ready for harvest. If you cannot tell, you can test the kernels.
Test the corn for ripeness by pulling back the husk to expose the top kernels. Poke a plump kernel with your fingernail and look at the juice that runs from it. When the juice appears milky instead of clear, it's time to harvest the corn.
Grab onto the corn ear. Twist the ear downward to snap it from the stalk.
Place the corn ears into a basket or bucket. Place the corn ears in a single layer because stacking them does not allow the ears to breathe.
Prepare the corn ears using your desired cooking method. Refrigerate the corn if you cannot consume it immediately.