Holes at the bottom of your pots are like a safety mechanism. They prevent accidental drowning, like KP said. But they aren't necessary for the plant to grow, as long as you have a good handle on watering. In a pinch I have used containers without drainage and got a good crop. But you have to know precisely when to water and how much since you don't want any standing water in your pots.

If you are new to growing then I would make the holes, just as you have done.
Perp Reviewed by Perp on . is it bad to grow bud in pots with no drain holes in the bottom? well is it, ? Rating: 5