When they are fully ripe, they fall off. I like to pick them a little
before that. Pick them when the paper husk cracks and the fruit inside is
starting to yellow a little (but it'll still be green, not really yellow)
and you'll be pretty close.

I used mixed jalapeno and serrano peppers when I made it.

Bob

They have a ways to go I'd guess. The husks are quite large, and only half
full. I think I have a bumper tomatillo crop heading my way