If you want corn to bloom when cooked, the first step is to choose older corn. The rice grains can be pinched with your hands without much pulp coming out. When peeling, leave a few leaves close to the rice grains. Place the corn flat in the pot and cover with the remaining corn leaves. Fill the water almost to the level of the corn and start lighting the fire. After boiling the pot, reduce to low heat and simmer for 20 minutes. After the fire ceases, wait 15 minutes and remove the lid. That's the effect you want.

You can also use a pressure cooker to cook half a pot of old corn, and it will bloom after reducing the pressure three times in a row.