To boil fresh corn on the cob, the cooking time generally ranges between 3 to 10 minutes depending on the method and preference for tenderness:

• One common method is to bring a large pot of water to a boil (without corn), then add the fresh corn cobs. Once the water returns to a boil, reduce to a simmer and cook the corn for about 5 minutes. This results in tender, juicy kernels without overcooking the corn.

• Another approach is to add the corn to boiling water, cover the pot, then turn off the heat and let the corn sit in the hot water for 10 to 30 minutes. This keeps the corn warm and perfectly cooked, making it tender and sweet.

• Some advice suggests boiling for a shorter time of 2 to 4 minutes, especially if you want a bit more crispness and to avoid overcooking.

In summary, a typical boiling time is around 5 minutes after the water returns to a boil, but letting corn sit in hot water off the heat for 10 minutes or more also works well and keeps the corn warm until serving. The best method depends on your texture preference and timing convenience.