Don't pay any attention to the wild videos on YouTube about breaking over tops and cutting tops off to make more energy go to the bulbs,.
It is hog wash and goes against logic.
Where are they going to get energy if their tops are broken or cut off?
In the heat of our southern states that time will come on its own in the summer.
If left in the ground they will sprout back up in the fall and grow all winter till they trigger in the spring and make seeds.