How much water and when to stop?

My bulbs are doing nicely but at some point I know they will want to rest for the summer without much moisture, just like they would in the wild. The question is when to stop the water.

I've been watering through the bloom, feeling that in pots on my porch they wouldn't have as much access to ground moisture as they would in the wild. So far, so good. When the blooms fade and any leaves start turning brown I intend to stop watering and put the pots in the side yard until next year. I'm only intuiting that this is the right thing to do.

- Posted at great expense from my iPhone